Introduction
Original Medicare is the federal coverage you receive through Medicare Part A and Part B. It is the starting point for understanding hospital coverage, outpatient care, provider access, bills, and the additional coverage choices that may follow.
It is broad coverage, but it is not complete coverage. Original Medicare does not include routine dental, routine vision, hearing aids, most outpatient prescriptions, or long-term custodial care. It also has deductibles and coinsurance without an annual out-of-pocket maximum.
Executive Summary
Original Medicare in one minute
Part A generally covers inpatient hospital care, limited skilled nursing facility care, hospice, and certain home health services. Part B generally covers doctors, outpatient services, durable medical equipment, many preventive services, and other medically necessary care.
You can generally use any doctor or hospital in the United States that takes Medicare. Medicare processes covered claims and pays its share of the Medicare-approved amount; you remain responsible for applicable premiums, deductibles, coinsurance, and non-covered care. A separate Part D plan can add outpatient prescription coverage, and Medigap may help with Original Medicare cost-sharing.
Quick Takeaways
- Original Medicare means Part A plus Part B.
- Part D and Medigap are not included automatically.
- There is generally no provider network, but the provider must take Medicare.
- Hospital “inpatient” and “observation” status are not the same.
- Original Medicare has no annual out-of-pocket maximum.
- Coverage depends on medical necessity and Medicare rules.
Start Here
What Is Original Medicare?
Original Medicare is the traditional federal Medicare program. Part A is often called hospital insurance, and Part B is medical insurance. Together, they pay for many medically necessary and preventive services under federal coverage rules.
Part A: Hospital Insurance
Inpatient hospital care, qualifying short-term skilled nursing facility care, hospice, and certain home health services.
Part B: Medical Insurance
Doctors, outpatient care, preventive services, durable medical equipment, and other medically necessary services.
How Original Medicare works
Get care
Use a doctor, hospital, or supplier that is enrolled in Medicare.
Claim is submitted
The provider generally sends the covered-service claim to Medicare.
Medicare decides
Medicare applies coverage rules and the Medicare-approved amount.
Costs are divided
Medicare pays its share; you or supplemental coverage pays the remaining covered share.
Original Medicare is Part A and Part B. Medicare Advantage is a private-plan alternative for receiving Part A and B benefits. Medigap supplements Original Medicare cost-sharing. Part D provides outpatient prescription drug coverage.
Hospital Insurance
Medicare Part A Explained
Part A generally pays for care when you are formally admitted as a hospital inpatient. It also covers qualifying short-term skilled nursing facility care, hospice care, and certain home health services.
Part A does not mean “everything that happens in a hospital.” Emergency department care, observation services, outpatient surgery, and physician services may be billed under Part B. Your formal status matters.
Medical Insurance
Medicare Part B Explained
Part B covers two broad categories: medically necessary services used to diagnose or treat a condition, and preventive services intended to prevent illness or find problems early.
Examples include physician visits, outpatient hospital services, laboratory testing, diagnostic imaging, ambulance services when requirements are met, mental health care, physical and occupational therapy, durable medical equipment, and many screenings and vaccines.
Part B generally does not provide broad outpatient retail prescription coverage. That is why people using Original Medicare often consider a separate Part D plan.
Coverage at a Glance
What Original Medicare Covers
Inpatient care
Formal inpatient hospital admissions, covered supplies, meals, general nursing, and certain inpatient drugs.
Post-hospital skilled care
Limited short-term skilled nursing or therapy when Medicare's qualifying conditions are met.
Home health
Certain part-time or intermittent skilled services from a Medicare-certified home health agency.
Hospice
Comfort-focused care for eligible people who elect the Medicare hospice benefit.
Doctors and outpatient care
Physicians, specialists, outpatient procedures, testing, therapy, and mental health services.
Prevention and equipment
Many screenings, vaccines, wellness visits, and medically necessary durable medical equipment.
Know the Gaps
What Original Medicare Does Not Cover
Original Medicare does not cover every healthcare or personal-care expense. Unless another type of coverage applies, you generally pay the full cost of non-covered services.
Routine dental care
Cleanings, fillings, extractions, and dentures are generally not covered, though limited dental services may be covered when closely connected to certain covered medical treatment.
Routine vision and hearing
Routine eye exams for glasses, most eyeglasses, hearing aids, and hearing-aid fitting exams are generally excluded.
Long-term custodial care
Help with bathing, dressing, eating, and other daily activities is not covered when custodial care is the only care needed.
Most outpatient prescriptions
Part B covers only limited categories of outpatient drugs. Broad retail prescription coverage generally requires Part D.
Routine physical exams
The Medicare yearly Wellness visit creates a prevention plan; it is not the same as a traditional routine physical.
Other exclusions
Examples include cosmetic surgery, massage therapy, private-duty nursing, and non-emergency care from a provider who has opted out of Medicare.
Side-by-Side
Medicare-Covered Services vs. Non-Covered Services
| Need | Original Medicare treatment | Important distinction |
|---|---|---|
| Hospital stay | Part A generally covers a formal inpatient admission | Observation is outpatient and generally billed under Part B. |
| Skilled nursing facility | Part A may cover short-term skilled care when requirements are met | It does not cover indefinite nursing-home residence or custodial care alone. |
| Home care | Certain skilled home health services may be covered | Round-the-clock home care, meals, and custodial help alone are generally not covered. |
| Preventive visit | Part B covers specified preventive services and Wellness visits | A Wellness visit is not a routine physical exam. |
| Prescription drugs | Part B covers limited drugs in specific settings | Most retail prescriptions require separate Part D coverage. |
| Dental, vision, hearing | Limited medically connected services may qualify | Routine dental, routine vision, and hearing aids are generally excluded. |
Part A Details
Hospital and Skilled Nursing Facility Coverage
Hospital coverage
Part A generally covers a semi-private room, meals, general nursing, certain inpatient drugs, and medically necessary hospital services after a formal inpatient admission. Physician services received in the hospital are generally covered under Part B.
You may stay overnight and still be an outpatient receiving observation services. Ask the hospital to explain your status and how it affects costs and post-hospital skilled care.
Skilled nursing facility coverage
Original Medicare may cover short-term skilled nursing or rehabilitation in a Medicare-certified facility. Eligibility generally requires a qualifying three-day inpatient hospital stay, entry into the facility within the required timeframe, available benefit-period days, and a need for daily skilled care related to the hospital stay. Observation time generally does not count toward the three inpatient days.
For 2026, eligible SNF care has $0 daily coinsurance for days 1–20 after the applicable Part A deductible, daily coinsurance for days 21–100, and no Part A coverage after day 100 in the benefit period. These amounts change annually.
Review current SNF requirements and costs →Care Beyond the Hospital
Home Health and Hospice Coverage
Home health coverage
Medicare covers certain home health services when a clinician certifies that you are homebound and need qualifying part-time or intermittent skilled nursing, therapy, or related services. Care must come from a Medicare-certified home health agency.
Covered home health is not the same as continuous household help. Medicare generally does not pay for 24-hour home care, delivered meals, homemaker services unrelated to the care plan, or personal care when that is the only service needed.
Hospice coverage
Part A covers hospice for eligible people who choose comfort-focused care for a terminal illness. The hospice team develops a plan of care. Original Medicare can continue covering unrelated health problems under normal Part A and B rules.
Hospice does not generally pay room and board in a person's home, nursing home, or residential hospice facility. Limited copayments may apply for outpatient symptom-control drugs and inpatient respite care.
Part B Details
Doctor, Outpatient, Preventive, and Equipment Coverage
Doctor and outpatient coverage
Part B generally covers medically necessary services from doctors and other qualified professionals, hospital outpatient care, testing, imaging, therapy, outpatient mental health care, and many supplies.
Preventive services
Part B covers many screenings, vaccines, counseling services, the “Welcome to Medicare” preventive visit when eligible, and yearly Wellness visits. Most specified preventive services cost nothing when the provider accepts assignment, but additional diagnostic or treatment services during the same visit may create deductible or coinsurance costs.
Durable medical equipment
Part B covers medically necessary equipment used in the home—such as certain walkers, wheelchairs, hospital beds, oxygen equipment, and CPAP devices—when Medicare's requirements are met. The prescriber and supplier must be enrolled in Medicare. After the Part B deductible, you generally pay 20% of the Medicare-approved amount when the supplier accepts assignment.
Review Medicare's DME rules →Using the Coverage
How Claims Work and How Provider Choice Works
Original Medicare generally lets you use any doctor or hospital in the United States that takes Medicare. There is usually no plan network or primary-care referral requirement, but not every provider accepts Medicare or accepts the Medicare-approved amount as full payment.
Ask before the visit
Confirm the provider is enrolled in Medicare and whether the provider accepts assignment.
Provider submits the claim
Participating providers must submit covered-service claims directly to Medicare.
Medicare processes it
Medicare determines the approved amount, covered share, and patient responsibility.
Review the notice
Your Medicare Summary Notice explains what was billed, what Medicare paid, and what you may owe. It also explains appeal rights.
A provider accepting assignment agrees to the Medicare-approved amount for covered services. A non-participating provider may accept assignment case by case and, in many situations, may charge up to the limiting charge. An opted-out provider generally uses a private contract and Medicare does not pay, except for limited emergency or urgent circumstances.
Your Share
Costs Under Original Medicare
Original Medicare uses premiums, deductibles, coinsurance, and hospital copayments. The figures below are 2026 amounts and change over time. Verify current amounts before making a financial decision.
| Cost | 2026 amount or rule | How it works |
|---|---|---|
| Part A premium | $0 for most people | People without enough Medicare-tax work history may be able to buy Part A. |
| Part A deductible | $1,736 | Applies per inpatient benefit period, not once per calendar year. |
| Inpatient hospital | Days 1–60: $0 daily after deductible; later days have daily coinsurance | Lifetime reserve days are limited; after covered days end, you pay all costs. |
| Part B premium | $202.90 standard monthly premium | Higher-income beneficiaries may pay more. |
| Part B deductible | $283 annually | Applies before Medicare begins paying for many Part B services. |
| Part B coinsurance | Usually 20% of the Medicare-approved amount | Applies after the deductible for many covered services. |
| Annual out-of-pocket maximum | None under Original Medicare alone | Supplemental coverage may reduce exposure. |
Deductibles, coinsurance, and copays
A deductible is what you pay before coverage begins paying. Coinsurance is a percentage of the approved cost. A copayment is a fixed amount. Part A's benefit-period structure can create more than one deductible in a year, while the Part B deductible is annual.
Verify current Medicare costs →Filling Gaps or Choosing Another Path
Medigap, Part D, and Medicare Advantage
Why many people buy Medigap
Medigap is private supplemental insurance designed to help pay some deductibles, coinsurance, and copayments left by Original Medicare. It generally works only with Original Medicare, does not include modern prescription drug coverage, and does not turn non-covered services into Medicare-covered services.
Why others choose Medicare Advantage
Medicare Advantage is an alternative way to receive Medicare Part A and Part B benefits through a private Medicare-approved plan. Plans may combine medical and drug coverage and may offer additional benefits, but they can use networks, service areas, prior authorization, and plan-specific cost sharing.
Where Part D fits
A person staying with Original Medicare can join a separate Part D plan for outpatient prescriptions. Part D has its own premium, formulary, pharmacy network, cost-sharing, and enrollment rules.
| Coverage | Purpose | Provider structure | Drug coverage |
|---|---|---|---|
| Original Medicare | Federal Part A and B coverage | Any U.S. provider that takes Medicare | Limited Part B drugs only |
| Medigap | Helps with Original Medicare cost-sharing | Follows Original Medicare | Not included in policies sold after 2005 |
| Part D | Outpatient prescription coverage | Plan pharmacy network and formulary | Primary purpose |
| Medicare Advantage | Private-plan alternative for A and B benefits | Plan rules and often networks | Often included, depending on plan type |
Avoid These Assumptions
Common Misunderstandings and Mistakes
Observation and outpatient services are generally Part B, even in a hospital bed.
It may cover limited skilled care, not long-term custodial residence.
Most outpatient drugs require separate Part D coverage.
It is a prevention-planning visit with defined components.
Providers may participate, be non-participating, or opt out.
Original Medicare alone has no annual out-of-pocket maximum.
Medigap primarily helps with cost-sharing for Medicare-covered care.
It is an alternative way to receive Part A and B benefits, not a Medigap policy.
Educational Illustrations
Original Medicare in Everyday Situations
Emergency room, then admission
Helen enters the emergency room as an outpatient and is later formally admitted. Part B generally covers the outpatient phase and physician services; Part A generally covers the inpatient stay.
Overnight observation
George spends a night in the hospital but is never admitted. His care remains outpatient under Part B, which may also affect eligibility for later SNF coverage.
Short-term rehabilitation
Linda has a qualifying inpatient stay and needs daily skilled therapy. Part A may cover an eligible Medicare-certified SNF stay for a limited time.
Long-term help with bathing
Arthur needs ongoing personal assistance but no skilled care. Original Medicare generally does not cover custodial care when it is the only need.
Home wound care
A clinician certifies that Rosa is homebound and needs intermittent skilled nursing. A Medicare-certified agency may provide covered home health services.
Yearly Wellness visit
Sam receives a covered Wellness visit from a provider accepting assignment. An additional unrelated diagnostic service may still create Part B cost-sharing.
Walker from a supplier
Naomi gets a medically necessary walker. She checks that both the prescriber and supplier are enrolled and that the supplier accepts assignment.
Doctor does not accept assignment
Caleb uses a non-participating physician. He may pay more than the Medicare-approved amount, subject to applicable limiting-charge rules.
Retail prescriptions
Denise takes several medications filled at a pharmacy. She uses a separate Part D plan because Original Medicare does not broadly cover retail prescriptions.
Care while traveling
Frank visits another state and uses a physician who takes Medicare. Original Medicare generally works nationwide, though foreign care is covered only in limited situations.
Frequently Asked Questions
Original Medicare FAQ
What is Original Medicare?
Original Medicare is the federal program made up of Part A hospital insurance and Part B medical insurance.
Is Original Medicare the same as Medicare Advantage?
No. Medicare Advantage is a private-plan alternative for receiving Medicare-covered Part A and Part B services.
Does Original Medicare include Part D?
No. You can add a separate Medicare drug plan to Original Medicare for outpatient prescription coverage.
Can I use any doctor with Original Medicare?
You can generally use any U.S. doctor or hospital that takes Medicare. Ask whether the provider accepts assignment because that affects your costs.
Do I need referrals to see specialists?
Original Medicare generally does not require a primary-care referral, but the specialist must take Medicare and the service must meet coverage rules.
Does Part A cover every hospital visit?
No. Part A generally covers formal inpatient admissions. Emergency, observation, and outpatient services are usually covered under Part B.
What is observation status?
Observation is outpatient hospital care used while a clinician decides whether to admit or discharge you. You can remain an outpatient even when you stay overnight.
Does Medicare cover skilled nursing facilities?
Part A may cover limited short-term skilled care when qualifying hospital, timing, facility, benefit-period, and daily-skilled-care requirements are met.
Does Medicare cover long-term nursing-home care?
Original Medicare generally does not cover long-term custodial care when help with daily activities is the only care needed.
Does Original Medicare cover home health care?
It covers certain part-time or intermittent skilled home health services for eligible homebound patients using a Medicare-certified agency.
Does Original Medicare cover hospice?
Part A covers hospice for eligible people who elect comfort-focused care for a terminal illness, subject to Medicare's requirements.
Does Part B cover preventive care?
Yes. Part B covers many screenings, vaccines, counseling services, and preventive visits. Cost-sharing depends on the service and provider assignment.
Is the yearly Wellness visit a physical exam?
No. It is a prevention-planning visit. Additional diagnostic or treatment services can create separate costs.
Does Medicare cover wheelchairs and walkers?
Part B may cover medically necessary durable medical equipment when Medicare requirements are met and enrolled prescribers and suppliers are used.
Does Original Medicare cover dental care?
Routine dental care and dentures are generally not covered. Limited dental services may be covered when closely connected to certain covered medical treatment.
Does Original Medicare cover hearing aids or routine vision?
Routine hearing aids, fitting exams, and routine eye exams for glasses are generally not covered, though specific medically necessary services may qualify.
What does accepting assignment mean?
It means the provider agrees to the Medicare-approved amount as full payment for covered services, leaving you responsible only for applicable Medicare cost-sharing.
Is there an annual out-of-pocket maximum?
Not under Original Medicare alone. Medigap or other supplemental coverage may reduce financial exposure.
Why would someone buy Medigap?
Medigap can help pay some deductibles, coinsurance, and copayments for services covered by Original Medicare.
Can I use Medigap with Medicare Advantage?
No. Medigap is designed to work with Original Medicare, not Medicare Advantage.
How do I know whether Medicare covers a service?
Ask the provider why the service is needed, check Medicare's coverage tool, and request written information when Medicare may not pay.
How do I review a Medicare claim?
Review your Medicare Summary Notice for the service, approved amount, Medicare payment, your possible responsibility, and appeal instructions.
Official Resources
Review Official Medicare Information
Individual Questions
Ask Steve About Original Medicare
Bring your doctors, prescriptions, travel needs, current coverage, and budget questions. The goal is to understand how the coverage works before choosing a path.
Steve Hamilton
Hamilton Insurance Agency
Florida License W792922
Phone: 352-232-9295
Email: steve@medicarebrooksvillefl.com
Medicare Disclaimer
This guide provides general educational information and does not replace individualized Medicare, legal, tax, medical, or financial advice. Medicare coverage rules, costs, provider participation, and benefits may change. Confirm current information with Medicare, Social Security, CMS, healthcare providers, and applicable coverage before making decisions.
Hamilton Insurance Agency is not connected with or endorsed by the U.S. government or the federal Medicare program.