; (B) the price paid to procure the drug under section 8126 of title 38, United States Code; or (C) the best price determined under section 1927(c)(1)(C) of the Social Security Act ( 42 U.S.C. 1396r–8(c)(1)(C) ) for the drug. (3) Participating providers (A) In general A health care provider that is a participating provider of services or supplier under the Medicare program under title XVIII of the Social Security Act ( 42 U.S.C. 1395 et seq.) or under a State Medicaid plan under title XIX of such Act ( 42 U.S.C. 1396 et seq.) on the date of enactment of this Act shall be a participating provider in the Medicare Transition plan. (B) Additional providers The Administrator shall establish a process to allow health care providers not described in subparagraph (A) to become participating providers in the Medicare Transition plan. Such process shall be similar to the process applied to new providers under the Medicare program. (e) Premiums (1) Determination The Administrator shall determine the premium amount for enrolling in the Medicare Transition plan, which— (A) may vary according to family or individual coverage, age, and tobacco status (consistent with clauses (i), (iii), and (iv) of section 2701(a)(1)(A) of the Public Health Service Act ( 42 U.S.C. 300gg(a)(1)(A) ))