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HomeMedicare 2026AnswersWhat are the parts of Medicare (A, B, C and D)?

What Medicare covers

What are the parts of Medicare (A, B, C and D)?

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Short answer

Medicare has four parts: Part A is hospital insurance and Part B is medical insurance, and together they make up Original Medicare, run by the federal government.

Part C, Medicare Advantage, is an alternative way to get Parts A and B through a private plan approved by Medicare, usually with drug coverage included.

Part D is prescription drug coverage sold by private plans, either on its own alongside Original Medicare or built into a Medicare Advantage plan; Medigap is extra insurance for Original Medicare, not a part of Medicare.

What does each part of Medicare cover?

The parts of Medicare (2026)
PartWhat it coversWho provides itWhat you pay
Part A (hospital insurance)Inpatient hospital stays, skilled nursing facility care after a qualifying hospital stay, hospice, some home health careMedicarePremium-free for most; $1,736 deductible per benefit period (2026)
Part B (medical insurance)Doctors, outpatient care, preventive services, lab tests, medical equipment, some drugs given in a doctor's officeMedicare$202.90 a month standard; $283 deductible, then usually 20% (2026)
Part C (Medicare Advantage)Everything Parts A and B cover, usually drug coverage, often extra benefitsPrivate plans approved by MedicarePart B premium plus any plan premium; out-of-pocket limit up to $9,250 in network (2026)
Part D (drug coverage)Outpatient prescription drugsPrivate plans approved by MedicarePlan premium; out-of-pocket cap $2,100 (2026), $2,400 (2027)

What is Original Medicare?

Original Medicare is Part A and Part B, paid for directly by the federal government. You can see any doctor or hospital in the U.S. that accepts Medicare, usually without referrals. After the deductibles you generally pay 20% of the cost of Part B services, with no yearly limit, which is why many people add a Medigap policy and a Part D drug plan.

What is Medicare Advantage (Part C)?

Medicare Advantage plans are offered by private insurance companies approved by Medicare. They cover everything Original Medicare covers, usually include drug coverage, and must cap your yearly out-of-pocket costs for in-network care. Most use networks of doctors and hospitals and may require referrals or prior approval; many include extra benefits like some dental, vision or hearing care. How it compares with Original Medicare.

What is Medicare Part D?

Part D covers outpatient prescription drugs. You get it through a stand-alone drug plan alongside Original Medicare or through a Medicare Advantage plan that includes it. Each plan has its own list of covered drugs, and out-of-pocket costs for covered drugs are capped at $2,100 in 2026. How Part D works.

Where does Medigap fit in?

Medigap (Medicare Supplement Insurance) isn't a part of Medicare. It's private insurance that helps pay Original Medicare's deductibles, coinsurance and copays. Plans are standardized by letter, so a Plan G covers the same benefits from any insurer. Medigap works only with Original Medicare, not with Medicare Advantage. Medigap Plan G vs. Plan N.

Good to know

More questions people ask

Is Medigap the same as Medicare Part C?
No. Part C is Medicare Advantage, which replaces how Original Medicare pays for your care. Medigap is a separate policy that supplements Original Medicare, and it can't be used with a Medicare Advantage plan.
Do I need every part of Medicare?
Most people have Parts A and B. You then choose either a Medicare Advantage plan or Original Medicare with a Part D plan (and, if you want, Medigap). Skipping Part B or Part D without other qualifying coverage can mean lifelong late penalties.
Do Parts A and B cover prescription drugs?
Only in limited cases: Part A covers drugs you get as a hospital inpatient, and Part B covers some drugs given in a doctor's office or clinic, such as many infusions and injections. Most prescriptions you fill at a pharmacy need Part D.
Who runs Medicare?
The Centers for Medicare & Medicaid Services (CMS), a federal agency. Social Security handles enrollment in Parts A and B; private companies approved by Medicare offer Medicare Advantage, Part D and Medigap plans.

Related questions

Sources

Figures are Medicare’s, set nationally, and were checked against these pages on October 2026. For your own situation, contact Medicare.gov or 1-800-MEDICARE (TTY 1-877-486-2048).

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This page was last updated: October 2026.

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