Medicare Part D is an insurance program that helps cover the cost of prescription drugs for people who are eligible for Medicare. It’s offered by private insurance companies
approved by the Centers for Medicare & Medicaid Services (CMS). You can enroll in a
stand-alone Part D plan, or you can join a Medicare Advantage plan that includes
prescription drug coverage. You pay a monthly premium for the plan, an annual deductible (if applicable), and co-pays or co-insurance for the medications that you
need.