In the case of an individual enrolled in a Medicare+Choice plan, the Secretary shall provide for necessary adjustments of the monthly beneficiary premium to reflect 80 percent of any reduction elected under section
1395w–24
(f)(1)(E) of this title and to reflect any credit provided under section
1395w–24
(b)(1)(C)(iv) of this title. To the extent to which the Secretary determines that such an adjustment is appropriate, with the concurrence of any agency responsible for the administration of such benefits, such premium adjustment may be provided directly, as an adjustment to any social security, railroad retirement, or civil service retirement benefits, or, in the case of an individual who receives medical assistance under subchapter XIX of this chapter for medicare costs described in section
1396d
(p)(3)(A)(ii) of this title, as an adjustment to the amount otherwise owed by the State for such medical assistance.