McGuffey

MEMORANDUM ****

Steven R. McGuffey sought judicial review in the district court of the Commissioner’s final decision denying his application for disability insurance under Title II of the Social Security Act (“the Act”), 42 U.S.C. §§ 401-33 , and supplemental social security income (“SSI”) under Title XVI of the Act, 42 U.S.C. §§ 1381 -1383f. The district court granted the Commissioner’s motion for summary judgment, and McGuffey appeals. 1 McGuffey claims that the Commissioner’s determination — in the form of a decision by an Administrative Law Judge (“ALJ”) — was both legally erroneous and not supported by substantial evidence because the ALJ failed to conduct a proper step-four analysis. 2 We agree and reverse and remand.

At step four in the sequential disability evaluation process, “claimants have the burden of showing that they can no longer perform them past relevant work.” 3 Pinto v. Massanari, 249 F.3d 840, 844 (9th Cir.2001). “Although the burden of proof lies with the claimant at step four, the ALJ still has a duty to make the requisite factual findings to support his conclusion.” Id. Under Social Security Ruling 82-62, 4 a determination “that an individual has the…