To amend part D of title XVIII of the Social Security Act to require the Secretary of Health and Human Services to negotiate and disclose lowest possible prices for prescription drug prices for Medicare beneficiaries.

Amends part D (Voluntary Prescription Drug Benefit Program) of title XVIII (Medicare) of the Social Security Act, as amended by the Medicare Prescription Drug, Improvement, and Modernization Act of 2003, to repeal provisions prohibiting the Secretary of Health and Human Services from interfering with the negotiations between drug manufacturers and pharmacies and prescription drug plan sponsors with respect to drug price. Replaces them with a requirement that the Secretary negotiate and disclose the lowest possible prices for prescription drugs for Medicare beneficiaries.