shall apply to veterans receiving such care or services under this section. (b) Eligible providers For purposes of this section, an eligible provider is one of the following: (1) A provider of services that has enrolled and entered into a provider agreement under section 1866(a) of the Social Security Act ( 42 U.S.C. 1395cc(a) ). (2) A physician or supplier that has enrolled and entered into a participation agreement under section 1842(h) of such Act ( 42 U.S.C. 1395u(h) ). (3) A provider of items and services receiving payment under a State plan under title XIX of such Act ( 42 U.S.C. 1396 et seq.) or a waiver of such a plan. (4) A provider that is— (A) an Aging and Disability Resource Center, an area agency on aging, or a State agency (as defined in section 102 of the Older Americans Act of 1965 ( 42 U.S.C. 3002 ))