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Medicare prescription drug coverage (Part D) is offered through private insurance companies, like Aetna and SilverScript. You can get Part D coverage through a stand-alone prescription drug plan (commonly referred to as a PDP) or some Medicare Advantage plans (commonly referred to as a MAPD or Part C).
A prescription drug plan (PDP) is a stand-alone Medicare Part D plan. PDPs only offer Part D and work together with your Original Medicare. This is a good option for someone who wants to stay in Original Medicare but add prescription drug coverage.
You are eligible to enroll in a PDP if you are already enrolled in Medicare Part A and/or Medicare Part B. Medicare Part D Prescription Drug Plans are only available through private insurers such as Aetna and SilverScript.
For more information, please visit our Unpacking Medicare prescription drug coverage page.
A Medicare Advantage prescription drug plan (or MAPD) is a plan — from a private insurer such as Aetna — that combines all your health coverage into one plan.
A MAPD plan includes:
Like other health plans, MAPDs come in various forms, such as HMOs (health maintenance organizations) and PPOs (preferred provider organizations).
There are four stages of Medicare Part D coverage that may change what you pay for covered prescriptions (aside from your plan premium) over the course of a year.
Here are some examples of what Part D prescription drug plans do not cover:
For a more complete list of drugs not covered by Medicare, please visit our Prescription drug formulary FAQ page.
Aetna Medicare and SilverScript Part D plans cover the shingles vaccine and some commercially available vaccines. Part D in general covers recommended adult immunizations when needed to prevent illness. Talk to your provider about which ones are right for you.
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