What Does Original Medicare Cover? More Importantly… What Does It NOT Cover?

If you’re getting ready for Medicare, you’ve probably heard plenty about what Medicare covers. Hospital stays. Doctor visits. Preventive care. Medical equipment. The list can make Original Medicare sound pretty comprehensive—and in many ways, it is.

But there’s another question I think is even more important:

What does Original Medicare NOT cover?

That’s where people can get caught off guard.

Many people enter Medicare assuming that once they have Part A and Part B, nearly all of their healthcare needs will be covered. Then they discover that routine dental care, most routine vision care, hearing aids, long-term care, and many other expenses aren’t generally covered by Original Medicare.

Prescription drug coverage also isn’t built into Original Medicare. If you want coverage for the prescriptions you typically pick up at the pharmacy, you generally need a separate Medicare Part D plan.

And there’s another detail that surprises many people: Original Medicare does not have a yearly limit on what you could pay out of pocket for covered Part A and Part B services.

That doesn’t mean Original Medicare is bad coverage. Far from it. Original Medicare provides broad access to doctors and hospitals that accept Medicare throughout the United States and covers a wide range of medically necessary care.

The key is understanding both sides of the story—what Medicare covers and where the gaps are—before deciding how you want to receive your Medicare coverage.

Let’s break it down in plain English.

What Is Original Medicare?

Original Medicare is the traditional Medicare program administered by the federal government. It consists of two main parts:

Medicare Part A — Hospital Insurance

Medicare Part B — Medical Insurance

With Original Medicare, you can generally see any doctor or use any hospital in the United States that accepts Medicare. In most cases, you don’t need a referral to see a specialist.

That flexibility is one of the biggest reasons some people prefer Original Medicare.

However, Original Medicare was never designed to cover every healthcare expense. When you receive a Medicare-covered service, Medicare generally pays its portion and you are responsible for your share of the cost.

Depending on your situation, you may also choose to add a separate Medicare Part D prescription drug plan and/or Medicare Supplement Insurance (Medigap) to help with some of the costs Original Medicare leaves behind.

What Does Medicare Part A Cover?

Think of Medicare Part A primarily as your hospital coverage.

Part A helps cover:

Inpatient hospital care
Skilled nursing facility care under qualifying circumstances
Hospice care
Some home health care

But here’s where I want you to pay close attention.

Having Part A does not mean that if you go into the hospital, Medicare simply pays the entire bill.

For 2026, the Medicare Part A inpatient hospital deductible is $1,736 per benefit period.

And those last three words—per benefit period—really matter.

The Part A Deductible Is Not Necessarily a Once-a-Year Deductible

This is one of the most important differences between Medicare Part A and the type of health insurance deductible many people are accustomed to.

A Medicare Part A benefit period begins the day you’re admitted as an inpatient to a hospital or skilled nursing facility. The benefit period ends after you have gone 60 days in a row without receiving inpatient hospital care or skilled care in a skilled nursing facility.

If you need inpatient hospital care again after that benefit period has ended, a new benefit period begins.

And with that new benefit period, you may have to pay the Part A deductible again.

In fact, Medicare places no limit on the number of benefit periods you can have in a year.

Let’s put that into real life.

Suppose you’re admitted to the hospital in January and owe the Part A deductible. You recover, go home, and enough time passes for that benefit period to end.

Then you’re hospitalized again several months later.

That could begin an entirely new benefit period, which means you could owe another $1,736 Part A deductible.

If another separate benefit period occurs later in that same year, you could potentially face the deductible again.

That’s why simply hearing “Medicare Part A covers hospital stays” doesn’t tell you the whole story.

For a Medicare-covered inpatient hospital stay in 2026, your Part A costs generally look like this:

Length of Medicare-Covered Inpatient Hospital Stay	Your 2026 Part A Cost
Days 1–60	$0 coinsurance after the $1,736 Part A deductible
Days 61–90	$434 per day
Days 91–150	$868 per day while using lifetime reserve days
After lifetime reserve days are exhausted	You pay all costs

Medicare gives you a total of 60 lifetime reserve days. These are additional hospital days you can use after day 90 of a benefit period, but as the name suggests, you have only 60 of them over your lifetime.

Most people don’t pay a monthly premium for Part A because they or a spouse paid Medicare taxes long enough while working.

So yes, Medicare Part A provides valuable hospital coverage. But this is an important distinction:

“Covered by Medicare” does not necessarily mean “fully paid for by Medicare.”

What Does Medicare Part B Cover?

Medicare Part B is the part of Original Medicare you’re more likely to use for everyday medical care.

Part B helps cover medically necessary and preventive services, including:

Doctor and other healthcare provider services
Outpatient care
Many preventive screenings and services
Durable medical equipment
Ambulance services when Medicare requirements are met
Mental health and substance use disorder services
Certain home health services
Certain medications administered in a medical setting

For 2026, the standard Medicare Part B premium is $202.90 per month, although some people pay more based on income.

The annual Part B deductible is $283 in 2026.

After you meet that deductible, you generally pay 20% of the Medicare-approved amount for many Part B-covered services.

And this brings us to another extremely important thing to understand about Original Medicare:

That 20% does not come with a built-in annual out-of-pocket maximum.

In other words, Original Medicare alone does not eventually say, “You’ve spent enough this year—your share of covered Part A and Part B services is now $0.”

That can become very important if you need frequent or expensive medical care.

And it brings us directly to the part of this article I really want you to understand:

What does Original Medicare NOT cover—and what could those gaps mean for your wallet?

What Does Original Medicare NOT Cover?

Now we get to the part that can really surprise people.

Original Medicare covers a wide range of medically necessary healthcare services, but it was never designed to cover everything. Some of the services people commonly use as they get older are either not covered at all or are covered only under specific circumstances.

Here’s a quick look:

Service or Expense	Does Original Medicare Generally Cover It?
Inpatient hospital care	Yes — but you have cost-sharing
Doctor visits and outpatient care	Yes — but you generally have cost-sharing
Many preventive services	Yes
Routine dental care	No
Dentures	No
Routine eye exams for glasses or contacts	No
Most eyeglasses and contact lenses	No
Hearing aids and exams for fitting them	No
Long-term custodial care	No
Most outpatient prescription drugs	Not through Parts A & B
Routine physical exams	No

There are some exceptions, which is why I’m using the word “generally.” For example, Medicare may cover certain dental services when they are directly connected to specific Medicare-covered medical treatment. Medicare also covers certain types of medically necessary eye care.

Another common point of confusion involves physical exams. Medicare covers certain preventive visits, including the “Welcome to Medicare” preventive visit and yearly Wellness visits, but these are not the same as a traditional routine physical exam.

The lesson here is simple:

Don’t assume a healthcare service is covered just because it seems medically necessary.

When you’re unsure, check Medicare’s coverage rules or ask your healthcare provider whether Medicare is expected to cover the service.

The Coverage Gap Many People Miss: No Annual Out-of-Pocket Maximum

Remember the Part B coinsurance we discussed earlier?

After meeting the Part B deductible, you generally pay 20% of the Medicare-approved amount for many Part B-covered services.

But here’s the important part:

Original Medicare does not have a built-in annual out-of-pocket maximum for Part A and Part B services.

That means there isn’t a dollar amount where Original Medicare automatically says, “You’ve paid enough this year. We’ll cover 100% of your covered Part A and Part B costs for the rest of the year.”

For someone who needs frequent medical care, outpatient treatments, or expensive Medicare-covered services, that distinction can matter.

This is one reason some people who choose Original Medicare also purchase Medicare Supplement Insurance (Medigap) to help pay certain out-of-pocket costs that Original Medicare doesn’t pay.

And it’s one of the important differences between Original Medicare and Medicare Advantage. Medicare Advantage plans have a yearly limit on what you pay out of pocket for covered Part A and Part B services.

Does Original Medicare Cover Prescription Drugs?

Not in the way many people assume.

Original Medicare does not include comprehensive coverage for the outpatient prescriptions you typically pick up at a pharmacy.

Medicare Part B does cover certain drugs under specific circumstances, including some medications administered by a doctor or other healthcare provider.

But if you choose Original Medicare and want coverage for most of your regular prescriptions, you generally need to enroll in a separate Medicare Part D prescription drug plan.

Even if you take few—or no—prescriptions when you first become eligible for Medicare, be careful about simply skipping Part D.

If you go without Part D or other creditable prescription drug coverage for 63 days or more after your Medicare drug coverage eligibility begins, you may have to pay a Part D late enrollment penalty if you enroll later. That penalty can continue for as long as you have Medicare drug coverage.

What About Dental, Vision, and Hearing?

This is probably one of the biggest surprises for people new to Medicare.

Dental

Original Medicare generally does not cover routine dental services such as cleanings, fillings, dentures, and most dental procedures.

Medicare may cover certain dental services in limited situations when they are closely connected to the treatment of a Medicare-covered medical condition. But that is very different from having routine dental coverage.

Vision

Original Medicare generally does not cover routine eye exams for eyeglasses or contact lenses, and it usually doesn’t cover the glasses or contacts themselves.

There are exceptions. For example, Medicare Part B can cover one pair of eyeglasses with standard frames or one set of contact lenses after cataract surgery that implants an intraocular lens, when Medicare’s requirements are met.

Hearing

Original Medicare does not cover hearing aids or exams for fitting hearing aids.

So if dental, vision, and hearing benefits are important to you, these are expenses you should consider when deciding how you want to receive your Medicare coverage.

Does Original Medicare Cover Long-Term Care?

This is another major Medicare misconception.

Original Medicare does not cover long-term custodial care.

Long-term care can include ongoing help with activities of daily living such as bathing, dressing, eating, and using the bathroom. This care may be provided at home, in an assisted living facility, or in a nursing home.

This is different from skilled nursing facility care, which Medicare Part A may cover for a limited period when Medicare’s requirements are met.

In other words, Medicare can cover qualifying skilled medical care, but it is not designed to pay for ongoing custodial care simply because someone needs help with everyday activities over an extended period.

For individuals and families planning for retirement, this is one coverage gap that’s especially important to understand before the need for long-term care arises.

So, What Can You Do About the Gaps in Original Medicare?

After reading about deductibles, coinsurance, prescription drug coverage, dental, vision, hearing, and the lack of an annual out-of-pocket maximum, you may be wondering:

If Original Medicare leaves all of these gaps, how do I protect myself?

For most people, there are two main paths to consider:

Option 1: Keep Original Medicare and add a Medicare Supplement (Medigap) policy, usually along with a separate Part D prescription drug plan.

Option 2: Choose a Medicare Advantage (Part C) plan as an alternative way to receive your Medicare Part A and Part B benefits.

These two options work very differently, which is why it’s important to understand the differences between Medicare Advantage and Medicare Supplement before choosing your coverage.

Option 1: Original Medicare + Medicare Supplement (Medigap)

A Medicare Supplement policy—also called Medigap—works alongside Original Medicare.

You keep Medicare Parts A and B as your primary coverage, and the Medigap policy helps pay certain out-of-pocket costs that Original Medicare leaves behind, depending on the Medigap plan you choose.

One of the biggest advantages of this route is flexibility. With Original Medicare, you can generally use any doctor or hospital in the United States that accepts Medicare, and in most cases, you don’t need a referral to see a specialist.

But Medigap does not fill every gap we discussed.

Standard Medigap policies generally do not cover routine dental care, routine vision care, hearing aids, long-term care, or prescription drugs. If you want prescription drug coverage, you can enroll in a separate Medicare Part D plan.

There is also a separate monthly premium for the Medigap policy, in addition to your Medicare Part B premium and any Part D premium you may have.

And timing matters.

Your six-month Medigap Open Enrollment Period generally begins the first month you have Medicare Part B and you’re 65 or older. During this period, you have important federal protections when purchasing a Medigap policy. After that period, your ability to buy a Medigap policy may depend on your circumstances and applicable protections.

Option 2: Medicare Advantage (Part C)

The second path is Medicare Advantage, also known as Medicare Part C.

This is where people sometimes get confused:

Medicare Advantage is not a supplement to Original Medicare.

Instead, it is another way to receive your Medicare Part A and Part B benefits. Medicare Advantage plans are offered by private insurance companies that contract with Medicare.

Most Medicare Advantage plans include Part D prescription drug coverage, and many plans offer additional benefits that Original Medicare doesn’t cover, which may include dental, vision, and hearing benefits.

Medicare Advantage plans also have a yearly out-of-pocket limit for covered Part A and Part B services. Once you reach your plan’s limit, you pay nothing for covered Part A and Part B services for the rest of that year.

However, Medicare Advantage plans work differently from Original Medicare.

Depending on the type of plan, you may need to use doctors, hospitals, and other healthcare providers within the plan’s network. Some plans may require referrals or prior authorization for certain services.

Costs, provider networks, prescription drug coverage, additional benefits, and plan rules can also vary from one Medicare Advantage plan to another.

Two Different Paths — Not One “Best” Answer

This is the part I think is most important:

Medicare Supplement and Medicare Advantage are not simply two versions of the same coverage. They are two very different ways of handling the gaps and costs associated with Medicare.

For some people, the flexibility of Original Medicare combined with Medigap is extremely important.

For others, a Medicare Advantage plan that combines their Medicare benefits, usually includes prescription drug coverage, offers an annual out-of-pocket limit, and may include additional benefits makes more sense.

Neither choice is automatically right for everyone.

Your doctors, prescriptions, healthcare needs, budget, travel habits, and comfort with provider networks can all influence which path may be a better fit.

That’s why choosing Medicare coverage should never be based on one attractive benefit or one monthly premium.

You have to look at the whole picture.

The Bottom Line

Original Medicare provides valuable healthcare coverage, but one of the biggest mistakes you can make is assuming that “covered by Medicare” means “Medicare pays for everything.”

It doesn’t.

Part A has a hospital deductible that can potentially apply more than once in the same year because it is based on benefit periods. Part B generally leaves you responsible for 20% of the Medicare-approved amount for many covered services after you meet the deductible. And perhaps most importantly, Original Medicare by itself has no annual out-of-pocket maximum for covered Part A and Part B services.

Then there are the things Original Medicare generally doesn’t cover: routine dental care, routine vision care, hearing aids, long-term custodial care, and most of the prescription drugs you pick up at the pharmacy.

That doesn’t make Original Medicare bad coverage. It simply means you need to understand what you’re getting—and what you’re not getting.

For many people, the decision eventually comes down to two different paths: staying with Original Medicare and adding a Medicare Supplement (Medigap) policy, usually along with Part D prescription drug coverage, or choosing a Medicare Advantage plan as another way to receive Medicare benefits.

There is no single Medicare option that is best for everyone.

The right choice depends on you—your doctors, your prescriptions, your budget, your healthcare needs, how often you travel, and what matters most to you when it comes to your coverage.

And if there’s one thing I hope you take away from this article, it’s this:

Don’t wait until you receive an unexpected medical bill to learn what Medicare doesn’t cover. Understanding the gaps before you choose your coverage can make a big difference later.

Frequently Asked Questions About Original Medicare

Does Original Medicare cover 100% of hospital bills?

No. Medicare Part A helps cover qualifying inpatient hospital care, but deductibles and coinsurance can apply.

Another important detail is that the Part A hospital deductible is based on a benefit period, not simply one deductible per calendar year. If you have more than one benefit period during the year, you could potentially owe the Part A deductible more than once.

Does Original Medicare have an annual out-of-pocket maximum?

No. Original Medicare by itself does not have a yearly out-of-pocket maximum for covered Part A and Part B services.

This is an important difference between Original Medicare and Medicare Advantage plans, which have a yearly out-of-pocket limit for covered Part A and Part B services.

Does Original Medicare include prescription drug coverage?

Original Medicare does not include comprehensive coverage for the outpatient prescriptions you normally pick up at a pharmacy.

Medicare Part B covers certain medications under specific circumstances, but people who choose Original Medicare and want broader prescription drug coverage can generally enroll in a separate Medicare Part D plan.

Does Original Medicare cover dental care?

Original Medicare generally does not cover routine dental care such as cleanings, fillings, dentures, and most dental procedures.

There are limited circumstances in which Medicare may cover certain dental services when they are closely connected to specific Medicare-covered medical treatment.

Does Original Medicare cover eyeglasses?

Generally, Original Medicare does not cover routine eye exams for glasses or contacts or the glasses themselves.

There are exceptions. For example, Medicare Part B can cover one pair of eyeglasses with standard frames or one set of contact lenses after qualifying cataract surgery that implants an intraocular lens.

Does Original Medicare cover hearing aids?

No. Original Medicare does not cover hearing aids or exams specifically for fitting hearing aids.

Does Original Medicare cover nursing home or long-term care?

Original Medicare does not cover long-term custodial care when that is the only care you need.

Medicare Part A may cover skilled nursing facility care for a limited period when Medicare’s requirements are met, but skilled nursing care and long-term custodial care are not the same thing.

Is Medicare Advantage the same as Medicare Supplement?

No.

A Medicare Supplement (Medigap) policy works with Original Medicare and helps pay certain out-of-pocket costs that Original Medicare leaves behind.

Medicare Advantage is an alternative way to receive your Medicare Part A and Part B benefits through a private insurance company that contracts with Medicare.

Understanding that distinction is one of the most important steps when comparing your Medicare coverage options.

References

For additional information and the most current Medicare rules, coverage details, and costs, visit these official resources:

This article is for educational purposes only and is not a substitute for information from Medicare or personalized advice regarding your individual Medicare coverage.