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Medicare Glossary

Definitions for common Medicare terms

Medicare part d

DEFINITION: Medicare Part D is prescription drug coverage that subsidizes the costs of prescription drugs for Medicare beneficiaries. Medicare recipients select the coverage by enrolling in either a prescription drug plan (PDP) – which covers only prescription drugs – or a Medicare Advantage plan, which covers prescriptions and other medical expenses. Enrollees pay a co-pay for each prescription, a monthly premium and an annual deductible. Find out how to enroll and what Medicare Part D coverage costs.