What Medicare Actually Covers: A Clear Guide to Your Benefits

Understanding what Medicare covers can feel confusing at first, especially with so many parts, plans, and terms to sort through. This guide breaks it all down in plain language so you can see, at a glance, what’s generally covered, what usually isn’t, and where you may need extra protection.

The Big Picture: How Medicare Coverage Works

Medicare is divided into several parts, and each part covers different types of care:

• Part A – Hospital insurance
• Part B – Medical insurance (doctor and outpatient care)
• Part C – Medicare Advantage (private plans that bundle Parts A and B, often more)
• Part D – Prescription drug coverage
• Medigap (Supplement Insurance) – Optional policies that help pay costs not fully covered by Original Medicare

What Medicare covers for you depends on:

• Whether you have Original Medicare (Parts A & B) or a Medicare Advantage (Part C) plan
• Whether you’ve added Part D for drugs
• Whether you have a Medigap policy

Let’s explore each area in more detail.

What Does Medicare Part A Cover? (Hospital Insurance)

Medicare Part A is often described as hospital insurance, but it covers more than just a hospital room.

Inpatient Hospital Care

Part A generally helps cover:

• Semi-private room
• Meals
• Nursing care
• Medications and medical supplies you receive during your stay
• Inpatient treatments ordered by your doctor

You’re usually covered if:

• You’re formally admitted as an inpatient
• The facility accepts Medicare

You still usually pay:

• A deductible per benefit period
• Possible daily coinsurance for longer stays

Skilled Nursing Facility (SNF) Care

Part A can help cover skilled nursing facility care after a qualifying hospital stay, when you need skilled services such as:

• IV medications
• Wound care
• Physical, occupational, or speech therapy

Important points:

• Coverage is for skilled care, not long-term custodial care
• There’s a limited number of covered days
• You may pay coinsurance after a certain period

Home Health Care (Limited)

Medicare Part A (and sometimes Part B) may cover home health services if you meet specific conditions, such as being homebound and needing skilled care. Covered services can include:

• Intermittent skilled nursing care
• Physical, occupational, or speech therapy
• Certain medical social services

Medicare typically does not cover:

• 24-hour home care
• Household services (like cleaning or shopping) if those are the only services needed
• Personal care (bathing, dressing) when that’s the only care you require

Hospice Care

For those with a terminal illness who choose comfort-focused care instead of curative treatment, Part A may cover:

• Pain relief and symptom management
• Nursing care
• Social services and counseling
• Short-term inpatient or respite care in some situations

A doctor must certify that you have a limited life expectancy (under current rules), and you agree to receive comfort care rather than treatment to cure the illness.

What Does Medicare Part B Cover? (Medical Insurance)

Medicare Part B covers many of the services you’re likely to use regularly, mainly in outpatient or office settings.

Doctor Visits and Outpatient Care

Part B typically helps cover:

• Primary care visits
• Specialist visits (such as cardiology or dermatology)
• Outpatient surgery and procedures
• Mental health services (outpatient counseling, psychiatric care)
• Certain telehealth services

You generally pay:

• A monthly premium
• An annual Part B deductible
• Coinsurance (often a percentage of the Medicare-approved amount)

Preventive Services and Screenings

One of the most important parts of Part B is preventive care. Medicare often covers a wide range of preventive services, when medically appropriate, including:

• “Welcome to Medicare” visit (within the first year of Part B)
• Yearly wellness visits
• Vaccines like:
  • Flu shot
  • COVID-19 vaccine (as applicable under current rules)
  • Pneumococcal vaccine
• Screenings for:
  • Certain cancers (like breast, colorectal, prostate, and others)
  • Diabetes
  • Heart disease risks
  • Depression and other mental health concerns

Many preventive services may be covered at no additional cost to you if you see providers that accept Medicare assignment and meet program rules.

Diagnostic Tests and Imaging

Part B commonly covers medically necessary tests such as:

• Blood work and lab tests
• X-rays
• MRIs, CT scans, and ultrasounds
• Certain cardiac tests and pulmonary function tests

These must be ordered by a doctor to diagnose or monitor a medical condition.

Durable Medical Equipment (DME)

Part B may help pay for durable medical equipment your doctor prescribes for use at home, such as:

• Walkers
• Wheelchairs or scooters
• Hospital beds
• Oxygen equipment
• Continuous glucose monitors (under certain conditions)

Typically, the equipment must be:

• Medically necessary
• Reusable
• Ordered by a Medicare-enrolled provider
• Supplied by a Medicare-enrolled DME supplier

Outpatient Therapies

When medically necessary, Part B may cover:

• Physical therapy (PT)
• Occupational therapy (OT)
• Speech-language pathology (speech therapy)

These services usually need a doctor’s order and are often given in outpatient clinics, therapy offices, or sometimes at home if you meet certain conditions.

What Does Medicare Part C (Medicare Advantage) Cover?

Medicare Advantage (Part C) plans are offered by private companies approved by Medicare. They’re required to cover at least what Original Medicare (Parts A and B) covers, but they can package benefits in different ways and often add extras.

Core Medicare Advantage Coverage

Every Medicare Advantage plan must cover:

• All Part A benefits (hospital, skilled nursing, hospice*)
• All Part B benefits (doctor visits, outpatient care, preventive services)

*In many cases, hospice care is still covered under Original Medicare even if you’re in a Medicare Advantage plan.

Extra Benefits Many Advantage Plans Offer

Many Medicare Advantage plans include additional coverage, such as:

• Prescription drugs (Part D)
• Routine dental care (cleanings, X-rays, basic procedures)
• Vision coverage (eye exams, glasses or contacts allowances)
• Hearing services (hearing tests, hearing aid allowances)
• Fitness or wellness benefits, like gym memberships

Coverage details, networks, and out-of-pocket costs vary widely by plan and location. It’s important to review:

• Which doctors and hospitals are in-network
• Which medications are covered and at what cost tier
• Copays, coinsurance, and out-of-pocket maximums

What Does Medicare Part D Cover? (Prescription Drug Coverage)

Medicare Part D is prescription drug coverage offered through private insurers approved by Medicare. You can get it:

• As a stand-alone Part D plan with Original Medicare
• Through a Medicare Advantage plan that includes drug coverage

Typical Part D Coverage

Most Part D plans cover a range of:

• Brand-name and generic drugs
• Medications in categories that Medicare expects plans to include (such as drugs for high blood pressure, diabetes, and many chronic conditions)

Each plan has a formulary (drug list) that:

• Groups drugs into tiers (usually lower copays for generics; higher for brand-name or specialty drugs)
• May require prior authorization, step therapy, or quantity limits for certain medications

You’ll typically have:

• A monthly premium
• Possible annual deductible
• Copay or coinsurance at the pharmacy

What Does Medigap (Medicare Supplement) Cover?

Medigap plans are optional policies you can buy from private insurers when you’re on Original Medicare (Parts A & B), not on Medicare Advantage.

Medigap plans are designed to help pay some of the out-of-pocket costs that Original Medicare does not fully cover, such as:

• Part A and Part B deductibles
• Coinsurance and copayments
• Some plans cover foreign travel emergency care up to plan limits

Key points about Medigap:

• Plans are standardized by letter (such as Plan G, Plan N, etc.), and each lettered plan offers a specific set of benefits
• Medigap does not include prescription drug coverage, so you generally need a separate Part D plan

Medigap does not usually add new services; it helps you pay for services that Medicare already covers.

Quick Summary: What Each Medicare Part Covers

Here’s a simplified overview:

What Medicare Usually Covers (and What It Usually Doesn’t)

A helpful way to think about Medicare is to separate medical and health-related care from non-medical or routine needs.

Commonly Covered (When Medically Necessary)

Medicare often covers:

• Hospital stays and surgeries
• Doctor and specialist visits
• Emergency room care
• Medically necessary tests and imaging
• Preventive screenings and vaccines
• Outpatient mental health care
• Rehabilitation therapies (PT, OT, speech)
• Durable medical equipment ordered by your doctor
• Home health services when strict criteria are met
• Hospice and end-of-life comfort care

The key phrase is “medically necessary” under Medicare rules. Services must be needed to diagnose or treat a medical condition or to prevent it from getting worse.

Commonly Not Covered

Many people are surprised by what Medicare does not usually cover. In general, Medicare does not cover:

• Most routine dental care (cleanings, fillings, dentures) under Original Medicare
• Routine vision exams for glasses or contacts (with some exceptions, such as after certain surgeries)
• Hearing aids and most routine hearing exams under Original Medicare
• Long-term custodial care, such as:
  • Assisted living facility stays
  • Long-term nursing home residency when you mainly need help with daily activities (bathing, dressing, eating)
• Routine foot care (with some exceptions for specific medical conditions)
• Cosmetic surgery (unless related to an injury or necessary to improve function)
• Most acupuncture and alternative therapies (with limited exceptions depending on current policy)
• 24/7 in-home caregivers when care is primarily personal or custodial

Some Medicare Advantage plans may offer limited coverage in areas Original Medicare does not, such as routine dental, vision, or hearing, but the details vary by plan.

How Medicare Decides What’s Covered

Medicare generally looks at:

1. Is it medically necessary?
   Does it diagnose, treat, or manage a health condition in a way recognized as effective?

2. Is it reasonable and appropriate?
   Is it being used in the right setting, at the right frequency, and at a reasonable cost compared with alternatives?

3. Is the provider enrolled in Medicare?
   Many services require that you see providers who accept Medicare or, for Advantage plans, providers in the plan’s network.

4. Does your specific plan include it?
   Especially important for:

   • Part C (Medicare Advantage) plans
   • Part D drug plans
   • Any prior authorization rules or coverage limits

It’s common for consumers to check directly with their plan or provider before scheduling non-emergency services, especially for high-cost items like imaging, surgery, or brand-name medications.

Special Topics: Areas People Often Ask About

Does Medicare Cover Dental?

• Original Medicare generally does not cover routine dental care, such as:
  • Cleanings
  • Fillings
  • Dentures
  • Tooth extractions (unless connected to an otherwise covered medical procedure)

Some Medicare Advantage plans may include dental benefits for routine or comprehensive services, but coverage, networks, and annual limits vary.

Does Medicare Cover Vision?

Original Medicare usually:

• Covers eye care related to medical conditions, like:
  • Cataracts (including surgery and basic intraocular lenses)
  • Glaucoma treatment and monitoring
  • Diabetic eye disease exams
• Does not typically cover:
  • Routine eye exams for glasses or contacts
  • Most eyeglasses or contact lenses (with some exceptions after cataract surgery)

Some Medicare Advantage plans may include routine eye exams and allowances for lenses or frames.

Does Medicare Cover Hearing Aids?

• Original Medicare generally does not cover:
  • Hearing aids
  • Routine hearing exams for fitting hearing aids

Certain Medicare Advantage plans may offer some hearing benefits, including exams and partial coverage or discounts for hearing aids.

Does Medicare Cover Long-Term Care?

Medicare is not designed to cover long-term custodial care. It may:

• Cover short-term skilled nursing facility care after a qualifying stay
• Cover rehab and therapy while you’re recovering

Medicare does not typically cover:

• Long-term residence in a nursing home when your main needs are custodial
• Assisted living facility fees
• Ongoing help with daily activities at home when this is the primary service

People often look into long-term care insurance, personal savings, or state-based programs (such as Medicaid, if eligible) to help with these costs.

What You Pay: Costs That Are Not Fully Covered

Even when Medicare covers a service, it doesn’t always pay the full amount. Expect to see:

• Premiums – Monthly payments for Part B, Part D, and many Medicare Advantage or Medigap plans
• Deductibles – The amount you pay before Medicare or your plan starts to pay
• Copayments and coinsurance – Your share of the cost for each service or prescription
• Out-of-network charges – In some Medicare Advantage plans if you see providers outside the plan’s network

Medigap plans can help with many of these out-of-pocket costs when you have Original Medicare.

Practical Tips for Understanding Your Medicare Coverage

Here are some practical ways to get clarity on your personal coverage:

1. Know your type of Medicare.

   • Original Medicare (Parts A & B) with or without Medigap and Part D
   • Or a Medicare Advantage (Part C) plan, possibly with drug coverage

2. Review your plan documents.

   • Summary of Benefits
   • Drug formulary (for Part D or Advantage with drug coverage)
   • Provider and pharmacy directories

3. Ask before scheduling non-emergency services.

   • “Is this covered by Medicare?”
   • “Is prior authorization required?”
   • “How much will I pay out of pocket?”

4. Check coverage for expensive prescriptions.
   If a drug is not covered or is in a high tier, ask your prescriber about alternatives that may be more affordable within your plan.

5. Revisit your choices annually.
   Coverage and costs can change each year, especially with Part D and Medicare Advantage. Many people review plans during the Medicare Open Enrollment Period to ensure their coverage still fits their needs.

Key Takeaways: What Medicare Covers

• Part A covers inpatient hospital care, skilled nursing facility care, limited home health services, and hospice, when medically necessary and under specific rules.
• Part B covers doctor visits, outpatient care, preventive services, tests, and durable medical equipment, with deductibles and coinsurance.
• Part C (Medicare Advantage) plans must cover at least what Original Medicare does, and often include extras like dental, vision, hearing, or drugs, but with plan-specific rules and networks.
• Part D covers many prescription drugs, with coverage depending on the plan’s formulary and tiers.
• Medigap helps pay out-of-pocket costs Original Medicare doesn’t fully cover, but doesn’t add new types of care.
• Medicare typically does not cover routine dental, vision, hearing aids, or long-term custodial care.

Understanding these basics can make it much easier to see where Medicare provides strong protection, where there may be gaps, and what choices (like Part D, Medicare Advantage, or Medigap) might help align your coverage with your personal health needs and budget.