Drugs whose prices have been reduced by the Medicare negotiation process established by the Inflation Reduction Act will not be subject to additional new discounts required in Part D as part of the law’s overhaul of the benefit design.
Medicare Part D Redesign: New Discounts Will Not Apply To Drugs With ‘Negotiated’ Prices
However, Part D drugs subject to government price setting under the Inflation Reduction Act will still face pharmacy benefit manager demands for additional rebates in return for preferential formulary status.

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