
    Michael C. DUFFEY, Appellant v. WORKERS’ COMPENSATION APPEAL BOARD (TROLA-DYNE, INC.), Appellees
    No. 4 MAP 2016
    Supreme Court of Pennsylvania.
    ARGUED: September 14, 2016
    DECIDED: January 19, 2017
    
      Fred Harold Hait, Esq., Allied Attorneys of Central Pennsylvania, LLC, for PA Association for Justice, Amicus Curiae.
    Drew Patrick Gannon, Esq., Katherman, Briggs & Greenberg, L.L.P., for Duffey, Michael C., Appellant.
    Amber Marie Kenger, Esq., Workers Compensation Appeal Board, for Workers’ Compensation Appeal Board, Appellee.
    William Joseph McCarthy, Esq., Ziru-link, Sherlock & DeMille, Thomas Francis Miller, Esq., for Trola-Dyne, Inc., Appel-lee.
    SAYLOR, C.J., BAER, TODD, DONOHUE, DOUGHERTY, WECHT, MUNDY, JJ.
   OPINION

CHIEF JUSTICE SAYLOR

The issue in this workers’ compensation appeal is ultimately whether a notice of compensation payable closely circumscribes the range of health-related conditions to be considered in impairment rating evaluations.

Appellant Michael C. Duffey (“Claimant”) sustained injuries to his hands when he picked up electrified wires while repairing a machine for Appellee, Trola-Dyne, Inc. (“Employer”). Employer issued a notice of compensation payable (the “NCP”) per Sections 406.1 and 410 of the Workers’ Compensation Act, 77 P.S. §§ 717.1, 731, which indicated that the “[bjody [p]art(s) affected” were “bilateral hands”; the type of injury was “electrical burn”; and the description of the injury was “stripping some electrical wire.”

On March 6, 2011, after Claimant had received benefits for total disability for a period of 104 weeks, Employer requested an impairment rating evaluation pursuant to Section 306(a.2)(l) of the Act, 77 P.S. § 511.2(1). In its request for designation of a physician to perform the evaluation per the applicable administrative regulations, see 34 Pa. Code § 123.104, Employer described the underlying compensable injury as “bilateral hands-nerve and joint pain.”

A few months later, Claimant submitted to an impairment rating evaluation (the “IRE”) by Bruce E. Sicilia, M.D. (the “Physician-Evaluator”), a specialist in physical medicine and rehabilitation. The Physician-Evaluator assigned a whole-body impairment rating of six percent, prompting Employer to issue a notice informing Claimant that his disability status would change from total to partial. This modification did not decrease the amount of Claimant’s weekly benefits, see 77 P.S. § 511.2(3) (“Unless otherwise adjudicated or agreed to based upon a determination of earning power ,.., the amount of compensation shall not be affected as a result of the change in disability status and shall remain the same.”), but instead, had the effect of limiting Claimant’s receipt of benefits to a 500-week period, see id. § 512(1) (prescribing that partial disability benefits are to be paid “for not more than five hundred weeks”).

Claimant proceeded to file a review petition attacking the validity of the IRE. Claimant did not aver that there had been a determination that he actually met the threshold impairment rating of at least 50 percent, as facially is required to support a challenge to an IRE under Section 306(a.2). See id. § 511.2(4) (“An employe may appeal the change to partial disability ... [pjrovided, [tjhat there is a determination that the employe meets the threshold impairment rating that is equal to or greater than fifty per centum impairment[.]”). Nevertheless, Claimant proceeded under prevailing Commonwealth Court precedent holding that such requirement does not pertain where the challenge is lodged, as it was here, within 60 days after the employer provides the claimant with notice of the status change from total to partial disability. See Barrett v. WGAB (Sunoco, Inc.), 987 A.2d 1280, 1288-89 (Pa. Cmwlth. 2010). It was Claimant’s position that the Physician-Evaluator had failed to rate the, full range of work-related injuries, since Claimant suffered from adjustment disorder with depressed mood and chronic post-traumatic stress disorder as a result of his work injury.

At hearings before a workers’ compensation judge (the “WCJ”), Claimant adduced his own testimony concerning the circumstances surrounding his injury and his initial and ongoing symptoms and treatment. According to this testimony, Claimant developed, and continued to experience, impairment in the use of his hands, agonizing deep pain, and debilitating exhaustion. See, e.g., N.T., Dec. 16, 2011, at 7-8.

Claimant later supplemented the record with deposition testimony from his family physician, Debra A. Bell, M.D., who had diagnosed Claimant with the adjustment disorder with depressed mood and chronic post-traumatic stress disorder and treated him -for- such conditions. See Deposition of Debra A. Bell, M.D., dated Mar. 20, 2012, in Duffy v. Trola-Dyne Inc,, No. 3485314 (DLI, Bur. of Workers’ Comp.), at 16, 18. Claimant also introduced deposition testimony from a neurologist, Scott M. Cherry, M.D., who attested that Claimant’s injury had evolved into a disabling, chronic neu-ropathic pain syndrome attended by emotional and cognitive changes. See Deposition of Scott M. Cherry, M.D., dated Dec. 9, 2011, in Duffy; No. 3485814, at 14, 16, 19, 33.

Employer presented the Physician-Evaluator’s testimony supporting the rating evaluation that he conducted. The Physician-Evaluator explained that, in addition to accounting for Claimant’s physical condition, he also considered Claimant’s complaints of pain, encompassing “work-related chronic neuropathic pain syndrome,” Deposition of Bruce E. Sicilia, M.D., dated July 27, 2012, in Duffy, No. 3485314, at - 23, 25, rating the condition according to a sensory impairment table provided in the governing impairment guidelines, see id. at 24. See generally 77 P.S. § 511.2(1) (keying impairment rating evaluations to “the most recent edition of the American Medical Association ‘Guides to the Evaluation of Permanent Impairment’ ”). According to the Physician-Eval-

uator, however, the rating did not account for asserted work-related adjustment.disorder or post-traumatic stress syndrome. In this regard, the Physician-Evaluator offered the following explanation:

I am not a psychiatrist and I don’t have appropriate skills, if you will, to do that ..type of assessment. And I was specifically asked to assess his electrical burn injuries and I did that.

Deposition of Bruce E. Sicilia, M.D., dated July 27, 2012, in Duffy, No. 3485314, at 31.

A clinical and forensic psychiatrist, Timothy J. Michals, M.D.,- also testified, via deposition on Employer’s behalf, that he had evaluated Claimant and concluded that he had recovered from the adjustment disorder with anxiety and depressed mood. See Deposition of Timothy J, Michals, M.D., dated Aug. 1, 2012, in Duffy, No. 3485314,-at-26-27. Dr. Michals-further expressed his disagreement with the diagnosis -of post-traumatic stress disorder. See id. at 32-34.

The WCJ accepted Claimant’s evidence as credible and rejected Employer’s conflicting evidence, directed that Claimant’s psychological conditions should be added to the notice of compensation payable, and determined that the IRE was invalid, because the Physician-Evaluator had not addressed those conditions. Accordingly, the WCJ also found that the total-disability status assigned to Claimant’s benefits could not be modified.

On appeal, the Workers’ Compensation Appeal Board reversed the decision to invalidate the IRE, reasoning that a physician-evaluator may properly limit an impairment rating evaluation according to the accepted injuries as reflected in a notice of compensation payable. Along these lines, the Board observed that Claimant had not, sought to amend the NCP to include additional injuries in a timely fashion, but instead, waited to do so until almost six months after the IRE was performed. The Board thus held that the six percent impairment rating assigned by the Physician-Evaluator was valid and, accordingly, modified the status of Claimant’s benefits from total to partial disability-

On further appeal, the Commonwealth Court affirmed the Board’s order in a published opinion. See Duffey v. WCAB (Trola-Dyne, Inc.), 119 A.3d 445 (Pa. Cmwlth. 2015). From the outset of its analysis, the intermediate court emphasized that Section 306(a.2) requires a determination of the degree of impairment “due to the compensable injury.” Id. at 450 (emphasis in original). The court then focused most of its remaining analysis on the “compensable injury” component of this phrase, explaining that the notice of compensation payable establishes the description of the work injury. See id. at 451 (quoting Harrison v. WCAB (Auto Truck Tmnsp. Corp.), 78 A.3d 699, 703 (Pa. Cmwlth. 2013)). In light of this approach—and given that an impairment rating evaluation involves an assessment of a claimant’s condition at the time of the evaluation, see id. (quoting Westmoreland Reg’l Hosp. v. WCAB (Pickford), 29 A.3d 120, 128 (Pa. Cmwlth. 2011))—the court indicated that “the focus in determining the validity of an [impairment rating evaluation] is on the state of the claimant and the compensable injury, as described in the [notice of compensation payable] at the time the [impairment rating evaluation] is performed.” Id. (emphasis in original).

After distinguishing several previous decisions, the Commonwealth Court expressed its disinclination to “believe that the General Assembly intended to nullify an already performed and otherwise valid IRE by claims of new or additional injuries that were not yet determined to be work-related and, therefore, would not have been addressed by the [evaluating] physician.” Id. at 452. To hold otherwise, the court posited, would contravene the reform goals of the 1996 amendment to the WCA which had implemented Section 306(a.2). See id. at 452-53.

Along these lines, the Commonwealth Court suggested that a contrary holding would encourage claimants to effectively sabotage impairment rating evaluations. See id. at 453 (“The delay in adding injuries as a litigation strategy to defeat an [impairment rating evaluation] performed under Section 306(a.2) does not serve the purpose of the IRE process or the 1996 Amendments to the Act.”). In this respect, the intermediate court stressed that an employer has only a single opportunity to obtain a self-executing change of a claimant’s status from total to partial disability. See id. (“Claimant’s position would effectively strip Employer of its only opportunity to obtain a self-executing change in disability status, by adding injuries to the [notice of compensation payable] after the IRE is performed and having the IRE declared invalid.”). According to the court, claimants should be encouraged to be proactive in updating notices of compensation payable so that their constellation of injuries can be considered in impairment rating evaluations. See id.

We find the outcome of this case to be controlled by straightforward statutory interpretation, a matter over which our review is plenary. See, e.g., Fish v. Twp. of Lower Merlon, — Pa. -, -, 128 A.3d 764, 769 (2015). At the outset, we reiterate that a pervasive focus on “com-pensable injury” has obscured an important aspect of the governing statute. See supra note 5. In this regard, Section 306(a.2) explicitly invests in physician-evaluators the obligation to “determine the degree of impairment due to the compen-sable injury,” 77 P.S. § 511.2(1) (emphasis added). Per such express terms, a physician-evaluator must consider and determine causality in terms of whether any particular impairment is “due to” the com-pensable injury. Id. Moreover, the required evaluation is of “the percentage of permanent impairment of the whole body resulting from the compensable injury.” 77 P.S. § 511.2(8)(ii).

We have no difference with the Commonwealth Court’s reasonable holding that a notice of compensation payable should define “compensable injury” for purposes of this inquiry. Such recognition, however, simply does not determine the range of impairments which may be “due to” such injury. Under Section 306(a.2) and the applicable impairment guidelines, the physician-evaluator must exercise professional judgment to render appropriate decisions concerning both causality and apportionment. See id.; accord Am. Med. Ass’n, Guides To the Evaluation of Permanent Impairment, Ch. 2, Introduction (6th ed. 2009) (the “AMA Guides”) (“Physicians must use their clinical knowledge, skills, and abilities to arrive at a specific diagnosis; define the pathology; and rate impairments based on the Guides’ criteria.”).

It is noteworthy that causation, for purposes of the AMA Guides, is assessed, in the first instance, by reference to an “event” rather than an “injury,” thus creating some potential tension with Section 306(a.2)’s focus on causal association with a compensable injury. See ÁMA Guides § 2.5b (“Causality is an association between a given cause (an event capable of producing an effect) and an effect (a condition that can result from a specific cause) with a reasonable degree of medical probability.”). But cf. id. Ch. 2, Introduction (depicting the AMA Guides as a “tool to translate human pathology resulting from a trauma or disease process into a percentage of the whole person”). Accordingly, there may be some basis in the AMA Guides permitting a physician-evaluator to attribute a claimant’s psychological disorders to the event in which the claimant was injured, rather than to the com-pensable injury itself. Again, however, a physician-evaluator simply may not entirely disavow any and all responsibility to consider causality relative to a given condition. See 77 P.S. § 511.2(1).

Here, it is apparent from the record that the Physician-Evaluator did not apply professional judgment to assess (or, per the applicable regulations, arrange for an assessment of) the psychological conditions identified by Claimant during the IRE examination; nor did he determine whether such conditions as might have been diagnosed were fairly attributable to Claimant’s compensable injury. Instead of abiding by the directives of Section 306(a.2) and the AMA Guides in such regards, the Physician-Evaluator purported to take a different set of instructions from Employer. See Deposition of Bruce E. Sicilia, M.D., dated July 27, 2012, in Duffy, No. 3485314, at 31 (“I was specifically asked to assess his electrical burn injuries and I did that.”). Proceeding as such, the Physician-Evaluator simply ignored a range of potential diagnoses and impairments. See, e.g., id. at 15 (reflecting the evaluator’s testimony that Claimant’s depression “was not rateable [sic] at the time became I was not asked to rate it.” (emphasis added)). Again, however, the Physician-Evaluator was bound to take his guidance, not from Employer, but from Section 306(a.2) and the AMA Guides. See AMA Guides § 2.3b (“As an impairment evaluator, the physician must understand the regulations pertaining to medical practice and evaluation.”); id. Chapter 2, Introduction (“Physicians must use their clinical knowledge, skills, and abilities to arrive at a specific diagnosis; define the pathology; and rate impairments based on the Guides’ criteria.”).

The Commonwealth Court’s opinion may reflect a pragmatic approach in requiring claimants manifesting psychological symptoms deriving from a compensable injury to address the causality question in advance of an impairment rating evaluation. There may obviously be an attendant concern that the alternative is to require psychological assessments in the broader range of impairment rating evaluations.

There are competing considerations involved, however. For example, injuries often are depicted briefly, and even cryptically, on notices of compensation payable. Furthermore, benefits ultimately cease as a result of -an unfavorable rating evaluation, although a claimant may remain, in conventional terms, totally disabled and unable to provide for his or her own well-being. See generally I A Constr., — Pa. at -, 139 A.3d at 155 (discussing the distinction between impairment and disability in terms of the focus of the latter term on loss of earnings capacity); AMA Guides § 2.3b (reflecting that the object of the impairment rating process is “to enable a fair and competent determination of benefits to which the [subject of the evaluation] may be entitled”).

Moreover, per the AMA Guides, as a matter of clinical judgment, a physician-evaluator may, where appropriate, treat the impairment rating pertaining to a particular organ or body system as encompassing a whole body assessment. See AMA Guides §§ 2.2a, 14.1c (reflecting the general rule that u[t]he psychological distress associated with a physical impairment is . included within the rating” for a physical condition (emphasis in original)). In point of fact, the AMA Guides rather pointedly discourage separate treatment of psychological effects. See AMA Guides § 14.1c (“In most cases of a mental and behavioral disorder accompanying a physical impairment, ... the mental and behavioral disorder chapter should not be used.” (emphasis added)). In this regard, it devolves to the physician-evaluator’s sound professional judgment whether, and under what circumstances, psychological conditions effectively graduate to distinct consideration per the AMA Guides’ mental- and-behavioral-disorders protocols.

In all events, the evaluative judgment is the touchstone on these subjects, as well as on the topic of causality. In the present case, since the Physician-Examiner failed to exercise such judgment based on a misunderstanding concerning the scope of his responsibilities, the WCJ did not err in invalidating the IRE.

The dissenting opinion authored by Justice Wecht chastises this opinion on multiple fronts, assérting that we have: exceeded the scope of the issues presented; ignored the statutory definition of “impairments”; compromised the impairment-rating process; inappropriately misallocat-ed decision-making responsibility relative to causation from workers’ compensation judges to physician-evaluators; and disregarded the significance of the fourth edition of the AMA Guides to the Evaluation of Permanent Impairment.

Regarding the issue preservation concern, Justice Wecht characterizes the question presented as a narrow one limited to the following:

Does an amendment that expands the injury description on a notice of compensation payable (“NCP”) invalidate an impairment rating evaluation (“IRE”) that was conducted before the amendment?

Dissenting Opinion at 998 (Wecht, J.). In point of fact, however, the issue accepted for review is framed in a considerably different fashion, see Duffey v. WCAB (Trola-Dyne, Inc.), — Pa. -, -, 131 A.3d 480, 481 (2016) (per curiam), as are the arguments in Claimant’s brief.

While, as we have previously explained, the issue statement and Claimant’s arguments are clouded by a conflation of the terms “injury” and “impairment,” see supra note 5, Claimant’s brief otherwise makes clear that he is advancing the position that a physician-evaluator has an obligation “to address all work-related conditions at the time of the evaluation.” Brief for Appellant at 19 (emphasis added). Unfortunately, the difficulty with the terms “injury” and “impairment” arises from the complexity of these overlapping and intersecting—but also diverging—concepts. See, e.g., supra note 10. Indeed, such conflation appears to be quite common. See, e.g., Dissenting Opinion at 998 (Wecht, J.) (incorrectly asserting that the holding of this opinion is that physicians must assess all of the claimant’s “injuries,” when in point of fact, we have repeatedly explained that the statutorily prescribed duty is simply to assess “the degree of impairment due to the compensable injury” on a “whole body” basis, 77 P.S. § 511.2(1), (8)(ii) (emphasis added)).

As a more general observation, a Court of last resort must have some leeway to make rational judgments and pronouncements that are not strictly confined according to the precise letter of parties’ arguments. Otherwise, the law would be shaped according to the nuances of the litigants’ presentations, including the extremes toward which they .sometimes press their positions within the adversary system. Such latitude is particularly appropriate in matters involving statutory construction, where the language of the governing statute ultimately must remain the polestar for rulings having widespread application. Again, from our point of view, Claimant’s position sufficiently implicates a plain-meaning interpretation of Section 306(a.2), and the need for clarification is sufficiently great, that the substantial differences between our approach and that of the dissents should be—and are fairly— resolved at the present time.

In reply to the criticism that we-have disregarded the statutory definition of “impairment,” see Dissenting Opinion at 998 (Wecht, J.), notably, the dissent fails to provide a concrete explanation. To the degree that the dissent is suggesting that the statutory definition excludes psychological impairment's, this is contradicted by both Section 306(a.2) and the AMA Guides which it incorporates. Alternatively, to the extent that the dissent is proposing a rule that psychological “impairment” can result only from a psychological “injury,” it fails to offer any textual grounding in the governing statute to support such a proposition. Indeed, as we have otherwise explained, psychological impairments are generally factored into the ratings for physical ones under the AMA Guides. See AMA Guides §§■ 2.2a, 14.1c. In this way— or through the alternative rating infrastructure provided in Chapter 14 of the AMA Guides where implicated—psychological impairments are always a component of the “whole- body” assessment explicitly required under Section 302(a.2). 77 P.S. § 511.2(8)(ii). From our perspective, the dissent’s contrary approach .unduly intermingles traditional compensation concepts into an impairment rating regime that, by its explicit terms, institutes a different focus.

Next, we address the assertion, in Justice Wecht’s dissent, that we have “convert[ed] the statute’s impairment-rating process into one in which physicians must scrutinize each ‘condition’ hinted at by a claimant, and then determine which, if any, are ‘fairly attributable’ to the compensable injury.” Dissenting Opinion at 998 (Wecht, J,). From our point of view, this line of argument red/uctio ad absurdum understates the role of the permanency threshold for impairments (such that a cough or a cold would not qualify), see 77 P.S. § 511.2(8)(ii), as well as the statutory causation requirement that the impairment be “due to” the compensable injury, id. § 511,2(1). Moreover, we do not find it to be at all unreasonable to believe that the Legislature intended to require a physician to render a detailed whole-person evaluation in. order to support an ultimate termination of benefits for injured persons whose right to seek legal redress has been substantially limited, see id. § 481(a), and who may remain permanently disabled in the traditional sense.

Regarding Justice Wecht’s position that a workers’ compensation judge must determine causation for impairments, we reiterate that this directly contradicts Section 306(a.2)’s express directive that the degree of impairment due to the compensable injury is determined “based upon an evaluation by a physician ... pursuant to the most recent edition of the [AMA Guides].” Id. § 511.2(1). To the extent that the dissent is suggesting that workers’ compensation judges and not physicians have the qualifications to render causation determinations, this overlooks the pervasive reliance by workers’ compensation judges upon expert medical opinion testimony from physicians in the adjudicatory setting.

' Certainly Section 306(a.2) introduced an innovation into the workers’ compensation system by directing an automatic impact on benefits premised on a physician’s determination, see 77 P.S. § 511.2(2), thus displacing the conventional involvement of a judicial or quasi-judicial decision-maker in the adjustment of substantive liabilities. This substantial change, however, is dictated by the statute and not of this Court’s own accord, and nothing in the statute supports the sort of parsing of the decision-making responsibility expressly allocated by the Legislature to physician-evaluators favored by Justice Wecht’s dissent.

Notably, we have otherwise identified deficiencies in the impairment racing statute and suggested that the system is ripe for legislative review and adjustment. See I. A. Constr. Carp., — Pa. at -, 139 A.3d at 159-61. Unless and until this occurs, however, it is our considered judgment that courts should adhere as closely as possible to the existing statutory directives, subject to constitutional limitations, rather than supplementing and/or adjusting these based on judicial policy-making judgments. From our point of view, such restraint is particularly in order given the many compromises and tradeoffs inherent in a workers’ compensation liability scheme, among competing interests which each are very important in their own right. See id. at 161.

. Finally, to the extent that Justice Wecht’s dissent suggests that the fourth edition of the AMA Guides to the Evaluation of Permanent Impairment does not permit the rating of mental and behavioral impairments, see Dissenting Opinion at 1000-01 (Wecht, J.), this is an issue of first impression in this Court which is well beyond the scope of this appeal. Nevertheless, we note that some other jurisdictions are in square disagreement with the dissent’s position that the fourth edition “categorically rejects the use of impairment percentages in the context of mental disorders,” id. at 1001. See Harvey v. H.C. Price Co., 957 A.2d 960, 962-68 (Me. 2008) (approving of the assignment of a percentage of impairment to the psychological component of an injury in a workers’ compensation system requiring the use of the fourth edition for impairment rating purposes and explaining that the method for establishing a percentage was “a product of [the physician-evaluator’s] medical training, clinical judgment, and application of the AMA Guides”). Alternatively, if assignment of impairment ratings pertaining to psychological impairments by evaluators is found to be impossible under the fourth edition, it may well be that the statute should simply be deemed incapable of enforcement as applied, and no conversions to partial disability should occur for claimants who suffer from serious work-related psychological impairments. Accord Torrey & Greenberg, West’s PA. Prac,, Workers’ Compensation § 6.52 (advocating such position).

In any event, as should be clear from the above, this case does not present questions pertaining to the fourth edition, and, unlike the dissent, we do not view these as overarching or disabling for present purposes. See Dissenting Opinion at 1000 (Wecht, J.). Rather, we believe this opinion addresses a matter that is important in its own right. Again, we hold that physician-examiners must exercise independent professional judgment to make a whole-body assessment of “the degree of impairment due to the compensable injury,” 77 P.S. § 511.2(1), which discernment cannot be withheld on the basis that the physician-examiner believes the undertaking is a more limited one.

The order of the Commonwealth Court is reversed, and the matter is remanded for reinstatement of the finding of invalidity rendered by the WCJ.

Justices Todd, Donohue, Dougherty and Mundy join the opinion.

Justice Baer files a dissenting opinion.

Justice Wecht files a dissenting opinion.

DISSENTING OPINION

JUSTICE BAER

As noted by the majority, Michael Duf-fey, Claimant herein, did not focus his argument on the issue addressed by the majority, namely, whether Bruce E. Sicilia, M.D., “the Physician-Evaluator” conducting the IRE, was obligated to evaluate Claimant’s PTSD/adjustment disorder as an impairment arising from the compensa-ble injury set forth in the NCP. Majority Opinion at 986 n.5. Rather, “it was Claimant’s position that the Physician-Evaluator had failed to rate the full range of work-related injuries, since Claimant suffered from adjustment disorder with depressed mood and chronic post-traumatic stress disorder as a result of his work injury.” Id. at 986. Nevertheless, the majority finds that the issue argued by Claimant sufficiently subsumes the analysis conducted by the majority. Specifically, the majority holds that a physician must consider the causal relationship between the compensa-ble injury and any impairment articulated by a claimant at the IRE, and fully evaluate those impairments as part of the IRE examination. The majority’s departure from the issue as expressed by Claimant is problematic for several reasons.

First, Claimant has never posited that his PTSD/adjustment disorder derived in any way from his accepted compensable work-related injury set forth in the NCP, ie., his hand injury. To the contrary, it has been Claimant’s position throughout all of the prior proceedings that the PTSD and adjustment disorder are independent injuries that, like his hand injury, derived directly from being electrocuted at work. Indeed, it seems obvious that the PTSD and adjustment disorder do not derive from claimant’s hand injury but, if compensable, are a result of being electrocuted. The majority takes the view that, regardless, the Physician-Evaluator conducting the IRE must independently evaluate any mentioned impairment a claimant makes at the examination and consider the causal relationship between the impairment and the compensable injury in the NCP. Majority Opinion at 989. Thus, even in a case like this, where the Claimant himself does not purport that the impairment he is expressing, PTSD/adjustment disorder, is related to his accepted hand injury, if the physician fails to evaluate those conditions, then the IRE is to be disregarded by the WCJ. Id at 990.

Second, by addressing the issue that was raised by Claimant in a way that was not fully briefed and argued by the parties, the majority has altered the structure of how IRE proceedings will take place without input regarding the full ramifications that will result from such alteration. In my mind, the Court’s holding will undermine the IRE process in general and permit claimants easily to invalidate otherwise fair IRE proceedings by simply expressing new physical and/or psychological conditions unknown to the employer, even ones that clearly were not derived from the injury set forth in the NCP. The claimant’s mere expression will trigger an obligation on the part of the physician to evaluate these conditions, regardless of the injuries accepted as compensable, or risk having the IRE declared a nullity. This obligation will inject uncertainty and inefficiency into the IRE process, which is contrary to the goals of- the legislature in enacting this legislation.-

Specifically,- pursuant to Section 306(a.2)(l) of the Workers’ Compensation Act, 77 P.S. § 511.2(1), when an employee has received total disability compensation for 104 weeks, unless otherwise agreed to, the employee will be required to submit to a medical examination (the IRE) for the purpose of determining the degree of impairment due to the compensable injury, if any. A duly rendered impairment rating is automatically effective if the employer/insurer requested the examination within 60 days after the expiration of the 104-week period prescribed by the statute. If such a determination results in an impairment rating that is equal to or greater than fifty percent impairment, then the employee will be presumed to be totally disabled and will continue to receive total disability compensation benefits. However, if such determination results in an impairment rating of less than fifty percent, then the employee will then receive partial disability benefits after proper notice.

An employer has only one opportunity under the Act to utilize the self-executing change; if employer requests an IRE beyond that short window, then employer must file a modification petition and litigate the requested change in disability status. Gardner v. Workers’ Compensation Appeal Board (Genesis Health Ventures), 585 Pa. 366, 888 A.2d 758, 767-68 (2005). The IRE procedure “was part of the General Assembly’s 1996 reform effort intended to reduce rising Workers’ Compensation costs and restore efficiency to the Workers’ Compensation system.” Hilyer v. Workers’ Compensation Appeal Board (Joseph T, Pastrill, Jr. Logging), 847 A.2d 232, 235 (Pa. Cmwlth. Ct. 2004).

Here, Employer requested the IRE within the 60 day window provided by subsection 306(a.2), which authorizes employers to issue the self-executing change of disability resulting from an IRE that establishes an impairment rating of less than fifty percent. 77 P.S. § 511.2(1), (2). Employer specified that the Physician-Evaluator should determine the percentage of impairment from Claimant’s hand injury, the only injury arising from the work incident accepted and set forth in the NCP. Although Claimant indicated at the time of the IRE that he suffered impairments from other work-related injuries arising from the work incident, I believe the physician properly limited his evaluation to the impairments associated with the compensable injury set forth in the NCP. As said, to hold otherwise is to subject the IRE process to chicanery having the potential to render it useless. Thus, I dissent and would affirm the Commonwealth Court’s decision.

DISSENTING OPINION

JUSTICE WECHT

Subsection 306(a.2) of the Workers’ Compensation Act provides that impairment-rating physicians shall “determine the degree of impairment due to the com-pensable injury.” 77 P.S. § 511.2(1). The learned Majority construes this to mean that physicians must assess all of the claimant’s injuries, including those that the claimant’s employer never accepted as compensable. The Majority arrives at this interpretation by disregarding the statutory definition of the word “impairment.” Because the Majority’s reading of Subsection 306(a.2) will compromise the impairment-rating process, which exists to quantify a claimant’s whole body impairment due to his established work-related injuries, I respectfully dissent.

The issue that Duffey presents is narrow: Does an amendment that expands the injury description on a notice of compensation payable (“NCP”) invalidate an impairment rating evaluation (“IRE”) that was conducted before the amendment? Trola-Dyne maintains that it does not, arguing instead that claimants must file a petition to amend the NCP before the IRE occurs. In the event that a claimant fails to seek an amendment prior to the IRE, Tro-la-Dyne notes, the claimant still may contest the change to partial disability status “at any time during the five hundred week period of partial disability,” 77 P.S. § 511.2(4), by petitioning the WJC to amend the NCP and then obtaining an impairment rating of at least fifty percent. Brief for Trola-Dyne at 23. Duffey, on the other hand, argues that allowing post-IRE amendments to invalidate an already-completed IRE would not impose much of a burden on employers, who can simply require that the claimant submit to another IRE. Brief for Duffey at 18.

The Majority adopts neither party’s position. Under the Majority’s approach, claimants in Duffey’s position need not file a petition to amend the NCP at all. This is so, the Majority reasons, because impairment-rating physicians have a duty to identify any injuries that are “fairly attributable” to the claimant’s compensable injury. To be sure, the fact that Duffey himself has not advanced the Majority’s reading of Subsection 306(a.2) does not mean that the issue is “waived” or otherwise beyond the scope of our review. Maj. Op. at 992-93. It is notable, however, that the interpretation which the Majority deems “straightforward” was not championed by Duffey, his Amicus, Trola-Dyne, the Commonwealth Court, the Appeal Board, or the WCJ. Moreover, to my knowledge, no judicial or administrative tribunal expressed such an understanding of Subsection 306(a.2) throughout the two decades since Act 57 became effective.

The Majority’s principal misstep is that it mislabels Duffey’s psychological conditions, both of which are injuries in their own right, as “impairments” that the IRE physician must diagnose and evaluate. Notably absent from the Majority’s analysis is the fact that the Act defines “impairment” as “an anatomic or functional abnormality or loss that results from the compensable injury and is reasonably presumed to be permanent.” 77 P.S. § 511.2(8)(i). Similarly, the Majority’s thorough review of the AMA Guides to the Evaluation of Permanent Impairment (“the Guides”) fails to recognize that the AMA defines “impairment” as “a significant deviation, loss, or loss of use of any body structure or body function in an individual with a health condition, disorder, or disease.” Am. Med. Ass’n, Guides To the Evaluation op Permanent Impairment 5 (6th ed. 2008). Under both definitions, losses could be anatomic (like amputation) or functional (like decreased range of motion or an inability to perform activities of daily living). As these definitions suggest, the purpose of an IRE is to determine whether the compensable injury has left the claimant with a permanent “loss,” and, if so, to quantify it. Put differently, impairment ratings quantify losses and limitations, not diseases and disorders.

Notwithstanding its repeated insistence that its holding flows from the plain language of Section 306(a.2), the Majority fails to elucidate the principle which can transform the statutory phrase “the degree of impairment due to the compensa-ble injury” into the unconfined styling “the degree of impairment due to injuries not yet determined to be compensable.” With today’s decision, the Majority by judicial fiat converts the statute’s impairment-rating process into one in which physicians must scrutinize .each “condition” hinted at by a claimant, and then determine which, if any, are “fairly attributable” to the com-pensable injury. Maj. Op. at 990. The Majority justifies this remodeling by citing a few nonspecific ■ passages from the Guides. But, when deciding whether a particular malady is causally related to a claimant’s work injury, the Guides are no more helpful to physicians- than a copy of Moby-Dick. As the Majority correctly notes, the Guides are simply a “tool to translate human pathology resulting from a trauma or disease-process into a percentage of the whole person.” Maj. Op. at 989.

The Majority invokes the mandate (which no one disputes) that impairment-rating physicians must determine the degree of “whole-body” or “whole-person” impairment. Id. at 989, 990, 991 n.10, 992, 992 n.14, 993. However, the Majority misconstrues the concept of “whole-body” impairment to mean that impairment-rating physicians must go beyond the scope of the claimant’s compensable injury. See id. at 993 n.l6p (stating that whole-body impairment “obviously encompasses the brain and functioning”); 994 (concluding that the General Assembly “intended to require a physician to render a detailed whole-person evaluation”).

The requirement that impairment ratings be expressed in terms of “the percentage of permanent impairment of the whole body,” 77 P.S. § 511.2, exists because the Guides’ formulae differ across the various organ systems. Some chapters, like those relating to the musculoskeletal system, yield “regional” ratings, which must be converted into a whole-person rating. The complete loss of a hand, for instance, is equivalent to 90% upper-extremity impairment, while the complete loss of an upper extremity is equivalent to 60% whole-person impairment. Am. Med. Ass’n, Guides To the Evaluation op Permanent Impairment 22 (6th ed. 2008). In light of these hierarchical impairment schedules, the “whole-body” requirement serves two important purposes. First, it ensures consistent impairment ratings across different organ systems, and second, it guarantees that a claimant’s total impairment rating will not exceed 100%. Id. at 21-22.

Chapter 14 of the Guides, which relates to mental and behavioral disorders, also provides no support for the Majority’s holding. As the Majority notes, the Guides “rather pointedly discourage separate treatment of psychological effects.” Maj. Op. at 991. Specifically, physicians are to use Chapter 14: (1) if a mental or behavioral disorder is present without a physical impairment; (2) if a mental or behavioral disorder “is judged independently com-pensable by the jurisdiction involved-,” or (3) when explicitly required by a particular state’s compensation system. Am. Med. Ass’n, Guides To the Evaluation of Permanent IMPAIRMENT 349 (6th ed. 2008) (emphasis in original). As with Subsection 306(a.2), these directives plainly contemplate that the scope of an IRE will be constrained by the “compensable injury.” Id.; 77 P.S. § 511.2(1) (providing that impairment-rating physicians shall “determine the degree of impairment due to the compensable injury”). Thus, the Majority errs in opining that “it devolves to the physician-evaluator’s sound professional judgment whether, and under what circumstances, psychological conditions effectively graduate to distinct consideration per the Guides’ mental-and-behavioral-disorders protocols.” Maj. Op. at 991.

Even if the Sixth Edition of the Guides supported the Majority’s statutory interpretation, I find it impossible to ignore the proverbial elephant-in-the-room that is Protz v. W.C.A.B. (Derry Area School Dist.), 124 A.3d 406 (Pa. Cmwlth. 2015), appeal granted, 133 A.3d 733 (Pa. 2016), in which the Commonwealth Court held that Subsection 306(a.2) constitutes an unconstitutional delegation of the General Assembly’s legislative authority. Notably, that decision required that impairment-rating physicians use the Fourth Edition of the Guides. Protz, 124 A.3d at 416. Yet, the Majority’s interpretation is driven, in part, by portions of the Sixth Edition that were not present in earlier versions. See Maj. Op. at 990-1000 (discussing Chapter 14 of the Guides, relating to “Mental and Behavioral Disorders”).

Setting aside the substantive legal issues in Protz, the appeal of which is currently pending before this Court, I see two problems with the Majority’s use of the Guides to interpret Subsection 306(a.2). First, as a conceptual matter, I fail to discern why this Court should, or even how it could, divine the legislative intent of Subsection 806(a.2) by looking at a publication that the AMA released more than a decade after the General Assembly enacted the statute. To make matters worse, the Fourth Edition of the Guides—the most recent version in existence when the General Assembly enacted Subsection 306(a.2) in 1996—categorically rejects the use of impairment percentages in the context of mental disorders, and contains no formula for calculating them. Am. Med. Ass’n, Guides To the Evaluation of Permanent Impairment 300 (4th ed. 1993) (explaining that there “is no available empiric [sic] evidence to support any method for assigning a percentage of impairment” to mental or behavioral disorders); id. at 301 (embracing the view that, “unlike the situations with some organ systems, there are no precise measures of impairment in mental disorders”).

Because it is likely that the Majority would interpret Subsection 306(a.2) differently if it relies upon the Fourth Edition of the Guides, I cannot agree that Protz has no bearing upon this case. Even a cursory review of the Majority’s analysis reveals that its decision today is rooted in the text of the Guides as much or more than it is grounded in the text of the statute. See e.g., Maj. Op. at 989, 990, 990-92. In other words, the Majority extensively relies upon the Sixth Edition of the Guides, even though current precedent holds that the Sixth Edition plays no role in the IRE process. My point here is not to suggest that the issue Duffey presents is not “important in its own right;” it is to propose that the manner in which the Majority resolves the issue disregards an important overarching inquiry. Id. at 996.

Equally troubling, the Majority relieves claimants of their burden of proving a causal relationship between the accepted work-related injury and any subsequently arising psychological injuries. On this subject, the Act makes clear that, when an employer accepts liability for purely physical injuries, the claimant bears the burden of proving the necessary causal relationship. See 77 P.S. § 772 (providing that a WCJ “may, at any time, modify, reinstate, suspend, or terminate a notice of compensation payable ... upon proof that the disability of an injured employe [sic] has increased, decreased, recurred, or has temporarily or finally ceased”).

In Commercial Credit Claims v. W.C.A.B. (Lancaster), 556 Pa. 325, 728 A.2d 902 (1999), a claimant was injured when he fell from a catwalk. The employer issued a NCP in which it voluntarily accepted liability for physical injuries that it described as “cervical syndrome, sprain[ed] right sternoclavicular joint.” Id. at 903. Three years later, the employer sought to terminate the claimant’s benefits, alleging that he had fully recovered from the work-related injury. The WCJ denied the employer’s termination petition, noting that the employer’s own medical expert had raised the possibility that the claimant was suffering from a psychological condition due to his initial work injury.

On appeal, we held that the WCJ erred in failing to confine his analysis to the injuries listed on the NCP. We emphasized that the claimant’s psychological -injury “plainly fell outside the scope of liability to which the employer had stipulated in the [NCP] because it was an entirely different type of injury, distinct in kind from” the claimant’s physical injuries. Id. at 905 n.5. Thus, “because claimant never sought to modify the terms of the [NCP] to include compensation for his mental injuries, employer needed to show only that claimant’s physical injuries had been resolved in order to succeed on its termination petition.” Id. at 905.

Although Commercial Credit Claims involved a termination petition rather than an IRE, the underlying rationale is equally applicable here. Our decision was based upon Section 407 of the Act, which provides that a NCP is “valid and binding unless modified or set aside,” as well as Subsection 413(a), which states that a WCJ may modify a NCP “upon proof that the disability of the injured employe [sic] has increased, decreased, [or] recurred.” 77 P.S. §§ 731, 772. Though the Majority claims otherwise, neither of these provisions is limited to the Act’s “modification and termjnation schemes.” Maj. Op. at 993 n.15. Furthermore, the Majority’s decision is at odds with our holding in Commercial Credit Claims insofar as the Majority refuses to acknowledge that Duffey’s late-manifesting psychological conditions are separate injuries, “distinct in kind from the [physical] injury described in the [NCP].” Commercial Credit Claims, 728 A.2d at 905 n.5.

Evidently, Duffey understands that the NCP’s injury description is binding unless modified or set aside, because he sought to amend the NCP to include his PTSD and adjustment disorder with depressed mood. The WCJ then held hearings, considered the deposition testimony of multiple physicians, made credibility determinations, and ultimately concluded that Duffey’s additional injuries should be added to the NCP. According to the Majority, all of this was unnecessary; instead, the impairment-rating physician unilaterally should have discerned the scope of Duffey’s compensa-ble injury. Or, to use the Majority’s words, the impairment-rating physician should have determined whether “any particular impairment” was due to the compensable injury, a phrase that may or may not be synonymous with the compensable injury itself. Maj. Op. at 992, 992-93 (referring to injuries and impairments as “overlapping and intersecting—but also diverging—concepts”), The Majority insists that this is nothing out of the ordinary, since WCJs typically rely upon medical experts in other contexts. In my view, however, a physician who proceeds according to his or her own assessment is not a substitute for a WCJ who first evaluates conflicting expert testimony and then reaches a reasoned decision. The Majority’s approval of the former marks a significant departure from both the statutory language and current practice.

I also find puzzling the Majority’s citation to a Department of Labor and Industry regulation, which instructs that, “when the evaluating physician determines that the compensable injury incorporates more than one pathology, the evaluating physician may refer the employee to one or more physicians specializing in the specific pathologies which constitute the compensa-ble injury.” 34 Pa. Code § 123.105(b). If anything, the above regulation suggests that the Department of Labor and Industry, unlike the Majority, believes that impairment ratings should include only the “pathologies which constitute the compen-sable injury.” Id (emphasis added). Despite the Majority’s concession that a NCP defines the compensable injury and that the NCP in this case did not include Duf-fey’s psychological injuries, it somehow concludes that Dr. Sicilia should have referred Duffey for an assessment of those injuries. Maj. Op. at 985-96, 989.

Finally, the Majority justifies its holding by noting that employers sometimes describe injuries “briefly and even cryptically” on NCPs. I share the Majority’s worry that such practices are not rare and that they might enure to a claimant’s detriment. See generally David B. Torrey & Andrew E. Greenberg, 8 West’s PA. Practice Series, Workers’ Compensation: Law and Practice, § 20:63 (3rd ed. 2008) (“Unfortunately, the integrity of the ‘description of injury’ can be impacted either by sloppy or perfunctory claims handling or by intentional though unwarranted efforts to limit employer liability.”). The NCP here, for example, described Duffey’s injury as “stripping some electrical wire.” See Notice of Compensation Payable, 3/23/2009, at 1. It may well be that in situations like these; where the NCP lacks needed specificity, we should interpret it in the light most favorable to the claimant, who, after all, did not. draft it. See e.g., Cerro Metal Products Co. v. W.C.A.B. (PLEWA), 855 A.2d 932, 938 (Pa. Cmwlth. 2004) (construing broadly an injury described in the NCP as “chemical fume exposure” because employer failed to “specify the physical injury,” instead describing “the manner in which it was acquired”). The Majority does not create such a rule here. It offers an authoritative interpretation of the Act, presumably applicable even when the NCP is a model of perfect clarity and precision.

The Majority’s interpretation of Section 306(a.2), one which neither party has advanced and which the plain language does not support, will fundamentally alter the IRE process. It will relieve claimants of their burden to prove compensable injuries and turn impairment-rating physicians into junior varsity WCJs. The likely result will be heightened confusion and increased litigation. I respectfully dissent. 
      
      . Act of June 2, 1915, P.L. 736 (as amended 77 P.S. §§ 1-1041.4, 2501-2626 (the “WCA" . or the "Act”)).
     
      
      , This Court recently summarized the impairment rating regime in IA Construction Corporation v. WCAB (Rhodes), — Pa. -,-, 139 A.3d 154, 155-56 (2016).
     
      
      . See 77 P.S. § 511.2(2) (prescribing that, if an impainnent rating determination under Section 306(a.2)(l) results in an impairment rating of less than 50 percent impairment under the relevant criteria, “the employe shall then receive partial disability benefits under [Section 306(b)]”); see also 34 Pa. Code § 123.105(d) (providing for a requisite notice to the employee of the change in status from total to partial disability).
     
      
      . It is beyond the scope of this appeal to consider the validity of the Commonwealth Court’s precedent on the subject of whether Section 306(a,2)(4) applies to challenges lodged within the 60-day period,
     
      
      . As further discussed below, Claimant’s framing of his argument, which has continued into the present appeal, is misleading, In this regard, physician-evaluators do not specifically rate "injuries”; rather, it is their obligation under the governing statute to determine "the degree of impairment due to the compensable injury.” 77 P.S, § 511.2(1). Thus, the rating is of impairments deriving from injuries.
      Despite this diversion, Claimant’s arguments do incorporate the notion that an impairment rating evaluator has "the obligation to address all work-related conditions existing at the time of the evaluation.” Brief for Appellant at 19 (emphasis added). Accordingly, although Claimant’s focus on rating injuries as opposed to impairments is pervasive, we find that his arguments do subsume the contention that an impairment rating evaluator is obliged to "determine the degree of impairment due to the compensable injury,” 77 P.S. § 511.2(1) (emphasis added), regardless of whether such impairment is otherwise separately denoted as a compensable injury unto itself.
     
      
      . The Commonwealth Court further observed that its decision did not foreclose a subsequent challenge to the IRE under Section 306(a.2)(4), to the degree that Claimant could produce an impairment rating evaluation demonstrating at least 50 percent impairment. See id. (citing 77 P.S, § 511.2(4)).
     
      
      . Parenthetically, the Commonwealth Court has separately determined that the 6th edition of the AMA Guides cannot be used to conduct impairment rating evaluations in Pennsylvania. See Protz v. WCAB (Derry Area Sch. Dist), 124 A.3d 406, 416-17 (Pa. Cmwlth. 2015), appeal granted, — Pa. -, 133 A.3d 733 (2016) (per curiam). Claimant, however, did not raise such a challenge, and the validity of the use of the 6th edition is beyond' the scope of the present appeal.
     
      
      . In dissent, Justice Baer posits that the outcome of this case should turn on an event-injury dichotomy. See Dissenting Opinion at 996, 997 n.l (Baer, J.). According to the dissent, Claimant does not attribute his psychological conditions to his, electrical bum injury, id. at 996—which has been recognized by Employer to encompass bilateral nerve and joint pain in the hands—and it should be obvious that the incident and the recognized injury are entirely distinct,, see id. To the contrary, however, although Claimant does explain that he was diagnosed with post-traumatic stress disorder “from the incident,” he depicts this to encompass the electrical "lead in his left hand consisting] of two wires ... melt[ing] to the bones in his hand.” Brief for Appellant at 3. Moreover, the expert testimony that Claimant offered and which was credited by the workers' compensation judge described an ongoing pain syndrome originating in Claimant's hands, as .well as a failure to improve from physical impairments, yielding derivative psychological conditions. See, e.g., Deposition of Scott M. Cherry, M.D., dated Dec, 9, 2011, in Duffy, No. 3485314, at 12-13 (describing the ongoing pain syndrome); id. at 14 ("I felt that he had, as was clearly obvious, the electrical injury and that this subsequently evolved into a chronic neu-ropathic pain syndrome”); id. at 33 (“The stated injury, ... electrical burn injury was followed by a syndrome of chronic pain complicated by emotional and cognitive changes,”); Deposition of Debra A. Bell, M.D., dated Mar. 20, 2012, in Duffy, No. 3485314, at 16 (attributing Claimant’s adjustment disorder to his failure to improve after his initial injury); id. at 27-28 (opining that Claimant's post-traumatic stress disorder was caused by his previous physical impairment).
      We believe that the impairment rating process encompasses discerning judgments recognizing the complexity of injury and causation, arising in part because notions of an "incident” (presently described by the dissent as "being electrocuted at work”) and attendant “injuries” (here, electrical burn and attendant nerve and joint pain) can be integrally interrelated. See infra note 10. In this case, however, the Physician-Examiner made no such judgments related to an event-injury distinction or otherwise, and such failure is both the specific basis for our decision and a matter about which Claimant expressly complains. See, e.g., Brief for Appellant at 14 (attacking the IRE because the Physician-Examiner "did not rate [the additional diagnoses] because of the limited scope of his exam and his lack of qualifications pertaining to those conditions." (emphasis added)).
     
      
      . See 34 Pa. Code § 123.105(b) ("To ascertain an accurate percentage of the employee's whole body impairment, when the evaluating physician determines that the compensable injury incorporates more than one pathology, the evaluating physician may refer the employee to one or more physicians specializing in the specific pathologies which constitute the compensable injury.").
     
      
      . In this regard, there is a tendency, in the workers' compensation arena, to oversimplify what can sometimes be complex subjects, such as injury and impairment. See generally AMA Guides § 1.3b (recognizing “the complex and dynamic interactions between an individual with a given health condition, the environment, and personal factors”); id. § 1.5a (“Impairment and disability are complex concepts ...,”); id. ("CT]he impact of injury or illness is dependent on factors beyond physical and psychological aspects, including biopsychosocial, behavioral and contextual issues.”).
     
      
      . Citing to a listing of rules set forth in Chapter 14 of the AMA Guides, Justice Wecht's dissent eschews the exercise of sound medical expertise and judgment, see Dissenting Opinion at 1000 (Wecht, J.), which is otherwise the touchstone of impairment rating evaluations. See, e.g., AMA Guides § 2.3b. The dissent, however, fails to recognize that the rules to which it refers are expressed in non-exclusiye terms. See AMA Guides at § 14.1c (stating that the rules for using Chapter 14 "would include” those highlighted by the dissent). See generally Mishoe v. Erie Ins. Co., 573 Pa. 267, 288, 824 A.2d 1153, 1165 (2003) (explaining that the term “includes” represents “non-exclusive verbiage”).
      In any event,.we have not disputed that the Physician-Examiner potentially could have appropriately relied on rules stated in Chapter 14, otherwise invoked principles under the AMA Guides, or exercised sound professional judgment to exclude Chapter 14’s application. However, as developed in the text above, the record amply demonstrates that that sinjpty is not what occurred in the present case. Rather, the Physician-Examiner erroneously followed instructions that were extrinsic to the AMA Guides, as well as the terms of the governing statute.
     
      
      . Per this Court's order allowing the appeal, the issue accepted for review is as follows:
      Did the Commonwealth Court err in concluding that an Impairment Rating Evaluation (IRE) ... was valid where the IRE only considered the injuries listed on the notice of compensation payable issued at the time of the injury, and did not consider additional injuries that subsequently arose and were known at the time of the IRE but not yet formally added to the description of injury?
      
        Id. As Justice Wecht's dissent stresses, Claimant does accept an additional obligation to secure a post-evaluation modification of the notice of compensation payable within a reasonable time after a contested rating evaluation. In our considered opinion, however, this does not prevent us from recognizing Claimant’s explicit assertions of an error on the part of the Physician-Evaluator in the first instance in declining to consider the degree of whole-body impairment due to the compensa-ble injury as the governing statute explicitly requires. See 77 P.S. § 511.2(1), (8).
     
      
      . Accord id. at 7 ("The Claimant submits that for an IRE to be valid, all of the Claimant’s work-related conditions at the time of the IRE must be rated.”); id. at 8 (explaining that Claimant advised the Physician-Evaluator of his psychological conditions at the time of the evaluation and faulting the Physician-Evaluator for failing as a consequence to consider such conditions in the rating evaluation); Brief for Amicus Pa. Ass’n for Justice at 5 ("[T]he Court should hold that in a timely filed appeal of an IRE determination, if the evidence shows that the IRE did not consider all work related pathologies, then the IRE is invalid.”).
     
      
      .For example, an amputation is both an "injury,” see, e.g., 77 P.S. § 513, and an impairment, see, e.g., AMA Guides at § 15.6 (discussing "Amputation Impairment”). Accordingly, to the extent that the dissent envisions a categorical division between the two—per which a condition that may be an injury for purposes of the traditional compensation regime cannot also represent a derivative impairment for purposes of the distinct impairment rating regime, see Dissenting Opinion at 998-99 (Wecht, J.)—such portrayal is incorrect.
     
      
      . To the degree that the dissents discern unfairness to Employer, we note that Claimant quotes the governing statute in his brief, see Brief for Appellant at 9 (explaining that an IRE is permitted “to determine the degree of impairment due to the compensable injury,” (quoting 77 P.S. § 511.2(1)), while repeatedly arguing that the Physician-Examiner erred by failing to account for his derivative psychological conditions. Indeed, Employer recognizes both that Claimant’s arguments are multidimensional and that they encompass the notion that "the IRE should have taken into account any and all possible injuries that [Claimant] might have had from the work injury.” Brief for Appellee at 14 (emphasis added). Apparently based on such understanding, Employer ably advances all of the policy positions highlighted in the dissents. See, e.g., id. at 15, 19, 23-24.
      In response to Justice Wecht's claim that our decision to implement the plain import of the governing statute represents a substantial change in workers' compensation practice, Dissenting Opinion at 998-99 (Wecht, X), certainly the dissent has not identified any deci-sional law from this Court that is in conflict with our holding. For example, the Commercial Credit Claims decision which the dissent highlights was expressly decided under the distinct statutory language of the WCA’s modification and termination schemes, see Commercial Credit Claims v. WCAB (Lancaster), 556 Pa. 325, 332, 728 A.2d 902, 905 (1999) (explaining that the disposition of the case was "plainly dictated by the relevant statutory provisions”), whereas, our present decision is premised on the plain language of an entirely different statute. Moreover,, it appears that the Commonwealth Court otherwise has recognized that the impairment rating system introduced a new conceptual overlay into the workers’ compensation regime. See, e.g., Harrison v. WCAB (Auto Truck Transp. Corp.), 78 A.3d 699, 703-04 (Pa. Cmwlth. 2013) (discussing an impairment rating "based on all of the claimant's medical conditions,” while highlighting the conceptual difference between a traditional compensation determination and an impairment rating evaluation).
     
      
      . See, e.g., 77 P.S. § 511.2(8)(ii) (defining "impairment rating” in terms of the degree of impairment to the "whole body,” which obviously encompasses the brain and functioning); AMA Guides § 1.3d (defining "impairment” to include deviation, loss, or loss of use of any ... body function,” which is separately defined under Section 1.3c to include "psychological functions”); see also id. at §§ 14.1b, 14.5 (discussing "psychiatric impairment”).
     
      
      . To the extent that the dissents express concerns about malingering, notably, the General Assembly integrated a potent safeguard into the impairment-rating regime, via its prescription that conversions may only be subject to challenge upon a determination that a claimant meets the fifty-percent impairment threshold. See 77 P.S. § 511.2(4); see also supra note 4 and accompanying text. The Commonwealth Court, however, has relieved claimants filing appeals within 60-days after notice of an automatic conversion of such condition, based upon the requirement that claimants be noticed of the conversion and attendant due process. See Johnson v. WCAB (Sealy Components Group), 982 A.2d 1253, 1257 (Pa. Cmwlth. 2009). See generally Torrey & Greenberg, West’s PA. Prac„ Workers’ Compensation § 6.48.50 (characterizing Johnson as a "remarkable case”). Although Johnson represents prevailing Pennsylvania precedent, it has not been subject to this Court’s substantive review, and we- believe that it would be unfortunate if the understanding of other key aspects of Legislature’s intent in the impairment rating system (i.e., the responsibility expressly invested in physician-examiners to determine the degree of impairment due to the compensable injury) were to be colored by an intermediate court’s deviation (whether correct or incorrect) from the plain import of others.
     
      
      . In this regard, we note that the approach of tying the continuation of disability benefits to impairment rating protocols has been decried by many physicians and characterized as "unappealing, if not Orwellian” in commentary. David B. Torrey & Andrew E. Green-berg, West's PA. Prac., Workers’ Compensation § 6.51 (2008 & July 2016 Supp.) (quoting Nortin M. Hadler, Impairment Rating in Disability Determination for Low Back Pain: Placing the AMA'Guides and the Quebec Institute Report in Perspective, in John F. Burton, Jr. & Timothy P. Schmidlé, Workers’ Compensation Desk Book 1-132 (LRP Pubs. 1992)); see also id. at § 6:48:50 (discussing controversy surround the AMA Guides, including the criticism that they lack any empirical basis). We make this observation not as an adoption of such viewpoint, but rather, to add perspective to our adherence to the specific statutory directives embodying the legislative policy choices that have been made in the impairment-rating arena.
     
      
      . The majority responds to Justice Wecht’s similar observation in dissent, that physician evaluators must now consider any condition hinted at by a claimant by noting that this ignores the statutory causation requirement that the impairment be "due to” the compen-sable injury. Majority Opinion at 994. It seems to me, however, that the majority has ignored this very requirement where, as here, there is no allegation that the articulated impairment is "due to” the compensable injury; rather, Claimant alleges the impairment is due to the work incident.
     
      
      . This Court consistently has held that the term “injury” encompasses “any hurtful or damaging effect which may be suffered by anyone.” Panyko v. W.C.A.B. (U.S. Airways), 585 Pa. 310, 888 A.2d 724, 735 (2005) (citing Creighan v. Firemen's Relief & Pension Fund Bd., 397 Pa. 419, 155 A.2d 844, 847 (1959)).
     
      
      .The Guides and the Act also define an "impairment rating” using similar language. See Am. Med. Ass'n, Guides To the Evaluation of Permanent Impairment 5 (6th ed. 2008) (describing an impairment rating as a “consensus-derived percentage estimate of loss of activity reflecting severity for a given health condition, and the degree of associated limitations in terms of ADLs [ (Activities of Daily Living)]”); 77 P.S. § 511.2(8)(ii) (“[T]he term 'impairment rating’ shall mean the percentage of permanent impairment of the whole body resulting from the compensable injury.”).
     
      
      . See Maj. Op. at 988-89, 990, 992 n.12, 993-94 n.15, 994, 994, 994-95.
     
      
      . Although the record in this case demonstrates that Duffey informed Dr. Sicilia about his mental health issues, the Majority’s holding logically would apply even if Duffey had remained silent. This is so because the statute provides simply that "[t]he degree of impairment shall be determined based upon an evaluation by a physician ... pursuant to the most recent edition of the [Guides].” 77 P.S. § 511.2(1).
     
      
      . See generally Payes v. W.C.A.B. (State Police), 621 Pa. 564, 79 A.3d 543 (2013) (discussing so-called "mental-mental” injuries).
     
      
      . It may be true that Duffey did not challenge the use of the Sixth Edition in this appeal, but the Majority’s interpretation of Subsection 306(a.2) presumably does not apply only to Duffey. See Maj. Op. at 989 ("Per [the] express terms [of Subsection 306(a.2),] a physician-evaluator must consider and determine causality in terms of whether any particular impairment is 'due to’ the compensable injury.”).
     
      
      . That the Fourth Edition of the Guides eschews the practice of assigning impairment percentages in the context of mental disorders is not open to serious debate. In that publication, the AMA, in no uncertain terms, took the position that there is no evidence “to support any method for assigning a percentage of impairment” to mental or behavioral disorders. Am. Med.'Ass’n, Guides To the Evaluation of Permanent Impairment 300 (4th ed. 1993). It is of no moment that the State of Maine’s Workers’ Compensation Act allows physicians to rate such impairments using criteria that were intended to be used for other purposes. Maj. Op. at 994-95 (citing Harvey v. H.C. Price Co., 957 A.2d 960 (Me. 2008)). Once more, the problem with the Majority’s analysis is that it is predicated upon the Sixth Edition of the Guides (the adoption of which the Commonwealth Court has held unconstitutional) despite the undeniable fact that the Sixth Edition differs dramatically from the Fourth Edition, particularly in the context of mental disorders. The' prospect that this Court, if presented with a challenge to the absence of certain impairment-rating criteria in the Fourth Edition, might apply a layer of judicial gloss on top of the AMA’s handiwork does not make the Majority’s statutory interpretation any less problematic.
     
      
      . Imagine a situation where a claimant, during an IRE, mentions that he is experiencing a litany of psychiatric symptoms. Although the NCP describes the compensable injury as a spinal injury, the physician—perhaps having read the Majority’s decision—finds that the claimant is suffering from PTSD, which he believes is fairly attributable to the claimant’s work injury. After evaluating the claimant’s physical and mental injuries, the physician concludes that the claimant has a fifty-percent impairment rating. This scenario is problematic because the issue of causation should be for the WCJ to decide, not the physician. See 77 P.S. § 772 (providing Aat Ae WCJ may modify a NCP upon proof Aat a claimant’s disability has increased).
      Furthermore, assuming Aat Ae employer could somehow challenge Ae physician’s determination, Ae employer would need to prove Ae absence of a causal relationship between Ae compensable injury and Ae subsequently arising psychological injury. In oAer words, the employer would be forced to prove a negative. See Commercial Credit Claims, 728 A.2d at 905 (declining to "strain Ae humanitarian goals underlying Ae [Act]” by requiring employers to disprove a causal relationship between the physical injuries described in Ae NCP and a subsequently alleged psychological injury).
     
      
      . It is also inconsistent with Ae Guides, which state Aat "an impairment evaluation is a form of expert testimony.” Am. Med. Ass’n, Guides To the Evaluation of Permanent Impairment 27 (6th ed. 2008).
     