A plan, other than a prepayment plan described in section 8903(4) of this title
, may not provide benefits, in the case of any retired enrolled individual who is age 65 or older and is not covered to receive Medicare hospital and insurance benefits under part A of title XVIII of the Social Security Act (42 U.S.C. 1395c
et seq.), to pay a charge imposed by any health care provider, for inpatient hospital services which are covered for purposes of benefit payments under this chapter and part A of title XVIII of the Social Security Act, to the extent that such charge exceeds applicable limitations on hospital charges established for Medicare purposes under section 1886 of the Social Security Act (42 U.S.C. 1395ww
). Hospital providers who have in force participation agreements with the Secretary of Health and Human Services consistent with sections 1814(a) and 1866 of the Social Security Act (42 U.S.C. 1395f
(a) and 1395cc), whereby the participating provider accepts Medicare benefits as full payment for covered items and services after applicable patient copayments under section 1813 of such Act (42 U.S.C. 1395e
) have been satisfied, shall accept equivalent benefit payments and enrollee copayments under this chapter as full payment for services described in the preceding sentence. The Office of Personnel Management shall notify the Secretary of Health and Human Services if a hospital is found to knowingly and willfully violate this subsection on a repeated basis and the Secretary may invoke appropriate sanctions in accordance with section 1866(b)(2) of the Social Security Act (42 U.S.C. 1395cc
(b)(2)) and applicable regulations.