Medicare Coverage Basics: What’s Included—and What Isn’t

Understanding what Medicare actually pays for is the key to avoiding surprise bills. Medicare is structured in parts, and each part covers different types of care while leaving some common needs out.

What Original Medicare Covers (Parts A and B)

Medicare Part A – Hospital Insurance
Part A generally helps cover:

• Inpatient hospital stays: semi-private room, meals, nursing care, and medically necessary tests while you’re admitted.
• Skilled nursing facility care: short-term rehab after a qualifying hospital stay, not long‑term custodial care.
• Home health care: part-time skilled nursing or therapy when medically necessary and ordered by a doctor.
• Hospice care: for people with a terminal illness who meet Medicare rules.

You still pay deductibles and coinsurance; Part A is not “free” care.

Medicare Part B – Medical Insurance
Part B generally helps cover:

• Doctor visits, including primary care and specialists.
• Outpatient services: same-day surgery, imaging, lab tests, emergency room care not resulting in admission.
• Preventive services: annual wellness visit, many vaccines, cancer screenings when Medicare criteria are met.
• Durable medical equipment (DME): items like walkers, wheelchairs, and home oxygen when medically necessary.
• Certain mental health services: outpatient counseling and psychiatric care.

Part B has a monthly premium, an annual deductible, and coinsurance (often 20% of the Medicare‑approved amount).

What Medicare Typically Does NOT Cover

Original Medicare leaves several everyday health needs outside its benefits. Common gaps include:

• Routine dental care: cleanings, fillings, dentures, and most oral surgery.
• Routine vision care: eye exams for glasses, eyeglasses, and contact lenses (with limited exceptions, such as after cataract surgery).
• Routine hearing care: hearing aids and standard hearing exams for fitting them.
• Long-term custodial care: help with bathing, dressing, or eating in a nursing home or at home when no skilled care is required.
• Most prescription drugs you take at home: these are generally covered under Medicare Part D or through a Medicare Advantage plan, not Parts A or B.
• Cosmetic surgery and most services that are not medically necessary.
• Care received outside the United States in most situations.

Knowing these gaps helps you decide whether to add coverage like a Part D drug plan, a Medigap policy, or a Medicare Advantage plan.

How Medicare Advantage and Other Options Fit In

Medicare Advantage (Part C) plans are offered by private insurers approved by Medicare. They must cover at least what Original Medicare covers, but:

• Many include Part D prescription drug coverage.
• Some offer limited dental, vision, or hearing benefits or extras like gym memberships.
• You use plan networks and follow plan rules, which can affect which doctors you see and what you pay.

Medigap (Medicare Supplement) policies don’t add new types of benefits; they help pay deductibles, coinsurance, and copayments under Original Medicare.

Bringing It All Together

The most important distinction is this: Medicare focuses on medically necessary, acute and preventive care—not routine dental, vision, hearing, or long-term custodial care. Once you know what’s in and what’s out, you can fill gaps with drug coverage, Medigap, or Medicare Advantage so your benefits match your real-world needs and budget.