Medicare · Part D
How does Medicare prescription drug coverage (Part D) work?
Part D is Medicare's prescription drug coverage, offered through private plans. You can get it as a standalone plan alongside Original Medicare, or built into many Medicare Advantage plans. If you go without creditable drug coverage after you're first eligible, a late-enrollment penalty may apply — and it can stay with you.
Medicare · Part D
How does Medicare prescription drug coverage (Part D) work?
Part D is Medicare's prescription drug coverage, offered through private plans. You can get it as a standalone plan alongside Original Medicare, or built into many Medicare Advantage plans. If you go without creditable drug coverage after you're first eligible, a late-enrollment penalty may apply — and it can stay with you.
Two ways to get Part D
The first is a standalone prescription drug plan that sits alongside Original Medicare. The second is coverage built into many Medicare Advantage plans, so the drug benefit and the medical benefit come from the same plan.
One detail that surprises people: Medicare Supplement policies sold today don't include drug coverage. So people who go the Supplement route generally add a standalone Part D plan. If you're weighing the two directions, our side-by-side comparison lays them out.
“Creditable coverage” — the phrase that matters
Creditable coverage generally means drug coverage that's at least as good as Part D — some employer plans and some VA drug coverage may qualify. If you keep creditable coverage, you can typically delay Part D without a penalty. If you lose it, there's usually a 63-day window to pick up a plan.
Veterans often have more than one thing in play here; we cover that on Medicare for veterans.
The late-enrollment penalty
Going without creditable drug coverage after you're first eligible may add an amount to your Part D premium, generally based on how many months you went without. In most cases that amount stays with you for as long as you have drug coverage, which is why the timing tends to matter more than people expect.
Rules and figures are typically updated each year, so treat this as general education and confirm the details for your situation. You can also start from the Medicare hub.
Common questions
Questions we hear most
Do I need Part D if I don't take many medications?
Possibly. Even if you take little now, going without creditable drug coverage after you're first eligible may lead to a permanent late-enrollment penalty later. It's worth weighing with our team.
Does a Medicare Supplement include drug coverage?
No. Supplements sold today don't include prescription drug coverage, so people with a Supplement generally add a separate Part D plan.
What is creditable coverage?
Drug coverage that's at least as good as Medicare's — for example, some employer or VA coverage. Keeping it generally lets you delay Part D without a penalty; losing it usually opens a 63-day window to enroll.
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We do not offer every plan available in your area. Currently, we represent 10 organizations offering numerous Medicare plan options across our service area. Availability varies by location. Please contact Medicare.gov, 1-800-MEDICARE, or your local State Health Insurance Program (SHIP) to get information on all of your options.
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