What Is a Drug Formulary?
Each Medicare Part D plan includes a drug formulary, which is a list of drugs covered by the plan.
Drugs are divided up into different tiers based on the type of drug, whether or not it's a generic drug or a brand name drug, and other factors.
Generic prescription drugs are generally on lower tiers and cost less than brand name drugs or specialty drugs that may be on a higher tier.
The Medicare Part D “Donut Hole” Coverage Gap in 2025
The donut hole no longer exists, as of 2025 the out-of-pocket maximum has been reworked and no longer relies on the Donut Hole. In 2025 the out-of-pocket maximum for prescription drugs is $2,000.
Can I Get Help Paying for Medicare Part D?
Lower income Medicare beneficiaries may be able to receive some assistance purchasing a Part D plan. Medicare Extra Help offers assistance for paying Part D premiums, deductibles and cost-sharing expenses.
You may automatically qualify for Extra Help if you have Original Medicare (Part A and Part B) and meet any of the following conditions:
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You have full Medicaid benefits coverage
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Your state Medicaid program helps pay for your Part B premiums
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You receive Supplemental Security Income (SSI)
Depending on the level of Extra Help that you qualify for, you may only pay a portion of the Medicare Part D drug plan premiums and deductibles. Your level of qualification depends on your reported financial resources.
Most Medicare Advantage Plans Offer Prescription Drug Coverage
Medicare Advantage (Medicare Part C) plans are an alternative to Original Medicare. Medicare Advantage plans offer the same benefits as Original Medicare, and most Medicare Advantage plans also include prescription drug coverage.
Some Medicare Advantage plans also include coverage for other benefits that Original Medicare doesn't cover, such as routine dental, vision and hearing care.
Medicare Advantage plans are not the same as Medicare Supplement plans. You cannot have a Medicare Advantage plan and a Medicare Supplement plan at the same time.
Explore 2025 Medicare Part D Plans
The average cost of a Medicare Part D plan may be quite different than the options available to you in your immediate area.
If you have a Medicare Supplement plan, you may be able to get Medicare prescription drug coverage by joining a Part D plan.
A licensed insurance agent can help you compare plan costs and drug coverage in your area so that you can find a plan that covers the drugs you need and fits your budget.