of the Social Security Act as having in effect an agreement with the Secretary under the Drug Price Negotiation Program under part E of title XI of such Act, with respect to a price applicability period (as defined in section 1191(b) of such Act) and a selected drug (as defined in section 1192(c) of such Act) with respect to such period for which coverage is provided under such plan or coverage— (1) the provisions of such part shall apply— (A) in the case the drug is furnished or dispensed at a pharmacy or by a mail order service, to such plan or coverage, and to the participants, beneficiaries, and enrollees enrolled under such plan or coverage, during such period, with respect to such selected drug, in the same manner as such provisions apply to prescription drug plans and MA–PD plans, and to participants, beneficiaries, and enrollees enrolled under such prescription drug plans and MA–PD plans during such period