Robinson

MEMORANDUM ***

Elaine Ruth Robinson appeals pro se the district court’s summary judgment for the Commissioner of Social Security (“Commissioner”) on Robinson’s claim that the Administrative Law Judge (“ALJ”) improperly determined the onset date of her disability as December 1, 1996, and not November 30, 1992. We have jurisdiction under 28 U.S.C. § 1291 . We affirm.

We review de novo the district court order affirming the Commissioner’s denial of social security benefits. Armstrong v. Commissioner of the Soc. Sec. Admin., 160 F.3d 587 , 589 (9th Cir.1998). If the Commissioner applied the correct legal standards and substantial evidence supports *267 the Commissioner’s decision, it must be affirmed. Id.

None of Robinson’s examining and treating physicians opined that Robinson’s multiple sclerosis was disabling prior to December 20, 1996. The medical reports and the testimony of the vocational expert constitute substantial evidence supporting the ALJ’s conclusion that Robinson was capable of performing her past relevant work as a secretary/clerk until December 1, 1996. See Villa v. Heckler, 797 F.2d 794, 796 (9th Cir.1986) (stating that while the Secretary could have chosen an…