Drug coverage (Part D) How to get drug coverage Choose from 2 ways to get prescription drug coverage. You can choose a Medicare Part D plan. Or, you can choose a Medicare Advantage Plan (like an HMO or PPO) that offers drug coverage. What drug plans cover Learn what Medicare drug plans cover, including the list of covered prescription drugs (drug formulary), generic drugs, and tiers. Costs for Medicare drug coverage Learn about the types of costs you’ll pay in a Medicare drug plan. How Part D works with other insurance Learn about how Medicare Part D (prescription drug coverage) works with other coverage, like employer or union health coverage.