
    Danny FOSTER, Appellant, v. Michael J. ASTRUE, Commissioner, Social Security Administration, Appellee.
    No. 11-1646.
    United States Court of Appeals, Eighth Circuit.
    Submitted: Sept. 27, 2011.
    Filed: Oct. 4, 2011.
    Davis Duty, Jr., Duty & Duty Law, Fort Smith, AR, for Appellant.
    Shalyn Timmons, Assistant Regional Counsel, Social Security Administration, Office of the General Counsel, Dallas, TX, Mark W. Webb, Assistant U.S. Attorney, U.S. Attorney’s Office, Fort Smith, AR, for Appellee.
    Before MELLOY, BOWMAN, and SHEPHERD, Circuit Judges.
   [UNPUBLISHED]

PER CURIAM.

Danny Foster appeals the district court’s order affirming the denial of disability insurance benefits (DIB) and supplemental security income. Upon de novo review, see Buckner v. Astrue, 646 F.3d 549, 556 (8th Cir.2011), we affirm. First, we find no error in the administrative law judge’s (ALJ’s) determination as to which of Foster’s impairments was severe. See Caviness v. Massanari, 250 F.3d 603, 605 (8th Cir.2001) (claimant has burden of showing impairment is severe-that it significantly limits his physical or mental ability to perform basis work activity). Second, we find that substantial evidence supports the ALJ’s determination as to Foster’s residual functional capacity (RFC), see Jones v. Astrue, 619 F.3d 963, 971 (8th Cir.2010) (ALJ is responsible for determining RFC based on all relevant evidence, including medical records observations of treating physicians and others, and claimant’s description of limitations); and that the ALJ properly relied on the testimony of a vocational expert to find that Foster could perform his past relevant work, see Wagner v. Astrue, 499 F.3d 842, 853-54 (8th Cir.2007). Finally, to the extent Foster has properly developed the issue, see Meyers v. Starke, 420 F.3d 738, 743 (8th Cir.2005), we reject as meritless his contention that he was presumptively disabled under a particular listing.

The judgment is affirmed. 
      
      . The Honorable Robert T. Dawson, United States District Judge for the Western District of Arkansas, adopting the report and recommendations of the Honorable Barry A. Bryant, United States Magistrate Judge for the Western District of Arkansas.
     
      
      . Notably, while an AU must first evaluate a claimant’s credibility before determining RFC, see Tellez v. Barnhart, 403 F.3d 953, 957 (8th Cir.2005), Foster has not challenged the ALJ’s credibility determination, see Hacker v. Barnhart, 459 F.3d 934, 937 n. 2 (8th Cir.2006) (abandonment of issue on appeal)
     