Prescription Drugs Q&ASeptember 15, 2026·8 min read·By Jacob Posner, Founder & Editor
Do I Need a Separate Prescription Drug Plan With Medicare? (2026)
Short answer: Yes, unless you already have other creditable drug coverage.
Full answer: Yes. Original Medicare (Part A and Part B) does not cover retail prescription drugs, so most beneficiaries need a stand-alone Part D plan or a Medicare Advantage plan that bundles drug coverage (MAPD) to avoid a permanent late-enrollment penalty. In 2026, stand-alone Part D plans average $34.50 a month, the deductible cannot exceed $615, and a new $2,100 out-of-pocket cap ends what used to be the coverage gap (the 'donut hole'). You can skip Part D only if you already have creditable drug coverage through an employer, union, VA, or TRICARE plan.
Original Medicare surprises millions of new beneficiaries every year by not covering the pharmacy counter. Part A pays hospital bills and Part B pays doctor visits, but neither part pays for the prescriptions picked up at a retail pharmacy. Medicare Part D, the stand-alone drug benefit created in 2006, fills that gap, and Medicare Advantage plans that bundle drug coverage (MAPD) fill it a different way. Skipping both is possible, but Medicare charges a permanent late-enrollment penalty for anyone who goes without creditable drug coverage for 63 days or more after becoming eligible.
Prescription drug coverage choices affect nearly every Medicare enrollee's monthly budget, and the sections below walk through how Medicare drug plans work in 2026: what Original Medicare covers and does not cover, how much a stand-alone Part D plan costs, what Medicare Advantage adds, and how Extra Help and state pharmacy assistance programs lower costs for people with limited income. For a side-by-side comparison, see Medicare Advantage vs. Original Medicare plus Medigap. To estimate what you might owe on a pharmacy bill, use the medical bill analyzer.
Coverage Breakdown
Coverage by type
Plan Type
Covers Prescription Drugs?
How It Works
2026 Average Cost
Original Medicare (Part A and Part B)
No
Part A covers hospital-administered drugs; Part B covers a narrow list of physician-administered infusions and injectables, but neither pays for retail pharmacy prescriptions
No drug premium, but 100% of retail prescription costs fall on you
Stand-alone Part D plan (PDP)
Yes
Added on top of Original Medicare; formulary-based coverage with a deductible, copays, and coinsurance
$34.50/month average premium; deductible cannot exceed $615 in 2026
Medicare Advantage with drug coverage (MAPD)
Yes
Drug benefit bundled into one plan alongside hospital and medical coverage
$11.50/month average added drug premium in 2026; many $0-premium plans available
Medigap (Medicare Supplement)
No
Pays Original Medicare cost-sharing only; policies sold after 2006 cannot include a drug benefit
Requires separate Part D enrollment to get any drug coverage
Medicare Part B covers a narrow set of physician-administered drugs (chemotherapy infusions, some injectables), which is different from the retail pharmacy coverage Medicare Part D provides.
Source: Medicare.gov, CMS 2026 Part D Redesign Program Instructions Fact Sheet, KFF Medicare Part D 2026 brief
Direct Answer
Yes, most people enrolled in Medicare need a prescription drug plan. Original Medicare (Part A and Part B) does not cover retail prescription drugs. To get drug coverage, you enroll in a stand-alone Medicare Part D plan or a Medicare Advantage plan that includes drug coverage (MAPD). Skipping both triggers a permanent late-enrollment penalty unless you already have other creditable drug coverage, such as an employer retiree plan, VA benefits, or TRICARE.
What Original Medicare Covers (and Does Not Cover)
Original Medicare pays for two very different categories of prescription drugs, and neither one is the retail pharmacy benefit most people picture. Medicare Part A covers drugs administered during an inpatient hospital stay, bundled into the overall hospital bill. Medicare Part B covers a narrow list of physician-administered drugs: chemotherapy infusions, injectable osteoporosis drugs, and certain vaccines given in a clinic, along with insulin delivered through a covered insulin pump. Everything else, including the maintenance medications most seniors take daily for blood pressure, cholesterol, or diabetes, falls outside Original Medicare entirely and requires a separate Medicare Part D plan.
How Medicare Part D Stand-Alone Plans Work in 2026
Medicare Part D is optional drug-only insurance sold by private companies and added on top of Original Medicare. In 2026, CMS redesigned the benefit into three phases instead of the old four-phase structure with a coverage gap. You pay 100% of costs up to the deductible, which cannot exceed $615 in 2026. After the deductible, you pay copays or coinsurance during the initial coverage phase. Once your total out-of-pocket spending on covered drugs reaches $2,100 in 2026, catastrophic coverage kicks in and you pay $0 for the rest of the year, a cap set by the Inflation Reduction Act of 2022.
The national average Part D premium for a stand-alone plan is $34.50 a month in 2026, though actual premiums vary widely by plan and by which drugs are on the plan's formulary. Every formulary sorts drugs into tiers, with generics in the cheapest tiers and brand-name or specialty drugs in the most expensive tiers, so the same premium can produce very different real-world costs depending on your prescriptions.
What Medicare Advantage Adds (MAPD Plans, 2026)
Medicare Advantage plans that include drug coverage are called MAPD plans, and they bundle Part D benefits into the same plan that covers hospital and medical care. In 2026, the average added premium for MAPD drug coverage is $11.50 a month, and many Medicare Advantage plans in competitive markets charge $0 for the drug portion. MAPD plans use their own formularies and pharmacy networks, which can differ from a stand-alone Part D plan, so switching from Original Medicare plus Part D to Medicare Advantage (or the reverse) means checking whether your specific medications and pharmacy are still covered.
Medigap (Medicare Supplement) policies work differently: federal law bars any Medigap policy sold after January 1, 2006 from including a drug benefit, so Medigap policyholders still need a stand-alone Medicare Part D plan even though Medigap covers much of the Part A and Part B cost-sharing.
Your drug plan re-prices every January. Your prescriptions did not move
A free hand-checked report of what your medications cost on your county’s plans, plus the switch dates that apply to you. On our sister site BenefitsUSA.
Retail prices for common maintenance drugs without any insurance can run well beyond a Part D premium. A 30-day supply of a brand-name statin or blood thinner frequently lists for $300 to $600 without coverage, and specialty drugs for conditions like rheumatoid arthritis or cancer can exceed $10,000 a month at full retail price. GoodRx and pharmacy discount cards can lower cash prices, but they do not count as creditable coverage for Medicare's late-enrollment penalty and do not apply toward the $2,100 out-of-pocket cap in 2026.
Extra Help and Other Ways to Lower Part D Costs
Medicare's Extra Help program, also called the Part D Low-Income Subsidy (LIS), pays part or all of a beneficiary's Part D premium, deductible, and copays for those with limited income and resources. As of 2026, anyone with income up to 150% of the Federal Poverty Level generally qualifies for full Extra Help benefits, with no deductible and copays capped at a few dollars per prescription. Anyone who is dual-eligible for Medicare and Medicaid automatically qualifies for full Extra Help.
State Pharmaceutical Assistance Programs (SPAPs): state-run programs in many states that supplement Part D coverage for residents with modest incomes.
Manufacturer patient assistance programs: many drug makers offer free or reduced-cost medication for people who meet income guidelines and do not have adequate coverage.
Disease-specific foundations: nonprofit groups like the Patient Access Network Foundation and HealthWell Foundation cover copays for specific conditions.
Medicare Savings Programs: state programs that can also help pay Part B premiums and, in some cases, qualify you automatically for full Extra Help.
Enrollment Timing and Avoiding the Late-Enrollment Penalty
Medicare uses a strict enrollment clock instead of medical underwriting for prescription drug coverage. Unlike ACA-compliant marketplace plans, which cannot deny coverage for a preexisting condition, Medicare does not medically underwrite Part D at all; it simply charges a permanent penalty for waiting. Prescription drugs are one of the ten essential health benefits required in ACA marketplace plans, but Original Medicare handles drugs through this separate, opt-in Part D system instead.
The penalty is 1% of the national base beneficiary premium ($38.99 in 2026) for every full month you went without Part D or other creditable drug coverage after your Initial Enrollment Period, added to your premium for as long as you keep Part D. You can enroll during your 7-month Initial Enrollment Period around your 65th birthday, during the Annual Enrollment Period from October 15 to December 7, 2026 for coverage starting January 1, 2027, or during a Special Enrollment Period triggered by losing other creditable coverage.
How to Find a Part D or Medicare Advantage Plan That Covers Your Drugs
Medicare.gov's Plan Finder tool lets you enter your specific medications, dosages, and preferred pharmacy to compare every Part D and Medicare Advantage plan available in your area by estimated annual cost, not just premium. The tool factors in the deductible, formulary tier, and whether your pharmacy is in-network or preferred, which can change your real cost by hundreds of dollars a year even between plans with similar premiums. Your State Health Insurance Assistance Program (SHIP) offers free, unbiased one-on-one help comparing plans if you would rather talk to a person.
Frequently Asked Questions
Does Original Medicare (Part A and Part B) cover prescription drugs?
Only in narrow situations. Medicare Part A covers drugs given during a hospital stay, and Medicare Part B covers a short list of physician-administered drugs like chemotherapy infusions, some injectables, and insulin delivered through a covered pump. Retail pharmacy prescriptions, the medications most people pick up monthly, are not covered by Original Medicare at all. You need a stand-alone Medicare Part D plan or a Medicare Advantage plan with drug coverage to get that benefit in 2026.
What is the Medicare Part D deductible in 2026?
The standard Part D deductible cannot exceed $615 in 2026, though many plans set a lower deductible or $0 deductible for certain drug tiers. You pay 100% of your prescription costs out of pocket until you hit the deductible, then move into the initial coverage phase where copays or coinsurance apply. Some low-cost generic drugs may be exempt from the deductible on certain plans, so check a plan's formulary before enrolling.
How much does a Medicare Part D plan cost in 2026?
The national average premium for a stand-alone Part D plan is $34.50 a month in 2026, while Medicare Advantage plans that include drug coverage average $11.50 a month for the drug portion, with many charging $0. Actual premiums vary by plan, region, and formulary, and higher earners pay an added Income-Related Monthly Adjustment Amount (IRMAA) on top of the base premium.
What happens if I don't sign up for Part D when I'm first eligible?
Medicare charges a permanent late-enrollment penalty equal to 1% of the national base beneficiary premium ($38.99 in 2026) for every full month you went without Part D or other creditable drug coverage. That penalty is added to your monthly premium for as long as you keep Medicare drug coverage, so a 24-month gap adds roughly $9.36 a month forever, on top of your regular Part D premium.
Can I get help paying for Medicare Part D if I have a low income?
Yes. Medicare's Extra Help program, also called the Part D Low-Income Subsidy, covers part or all of your premium, deductible, and copays if you qualify. In 2026, people with income up to 150% of the Federal Poverty Level generally qualify for full Extra Help, and anyone dual-eligible for Medicare and Medicaid automatically receives it. State Pharmaceutical Assistance Programs can help further.
Does Medicare Advantage include prescription drug coverage?
Most Medicare Advantage plans include drug coverage and are called MAPD plans, bundling Part D benefits with hospital and medical coverage in a single plan. Not every Medicare Advantage plan includes drug coverage, however, so confirm a specific plan is an MAPD plan before enrolling, especially since joining a Medicare Advantage plan without drug coverage can leave you without any prescription benefit.
What is the Medicare Part D out-of-pocket cap in 2026?
The 2026 out-of-pocket cap is $2,100. Once your total spending on covered drugs (deductible plus copays and coinsurance) reaches that amount, you enter catastrophic coverage and pay $0 for the rest of the calendar year on covered prescriptions. This cap, created by the Inflation Reduction Act of 2022, replaced the old system where costs could keep climbing indefinitely.
Is there still a donut hole coverage gap in Medicare Part D in 2026?
No. CMS eliminated the traditional coverage gap, or donut hole, when it redesigned Part D into three phases: deductible, initial coverage, and catastrophic. In 2026, once you reach the $2,100 out-of-pocket cap, you move straight into catastrophic coverage and pay nothing more for covered drugs, without the temporary jump in cost-sharing that used to happen in the gap.
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