How Many Days Does Medicare Pay for Rehab After a Hospital Stay? The 100-Day Rule
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Last Updated October 13, 2026
Reviewed by Christopher Daniels
Medicare Agent Licensed in SC, AL, AR & 41 other states
Medicare can help pay for skilled nursing facility (SNF) care and short-term rehab, but only under specific conditions. Many people assume Medicare will cover long-term nursing home care, but that’s not true. The coverage is limited to 100 days per benefit period, and understanding when it applies and when it doesn’t can save you from unexpected bills worth thousands of dollars.
This article breaks down exactly how Medicare covers skilled nursing and rehab after a hospital stay, who qualifies, how long the coverage lasts, and what costs you can expect.
Quick answer: Medicare Part A pays for up to 100 days of skilled nursing or rehab care per benefit period, after a qualifying 3-day inpatient hospital stay. Days 1 through 20 cost you nothing once the Part A deductible is paid. Days 21 through 100 run $217 a day in 2026. From day 101 on, you pay everything.
Those days reset only after you’ve been out of a hospital or facility for 60 straight days. Not on January 1.
What Is Skilled Nursing (and Rehab) Care Under Medicare?
Skilled nursing care refers to medically necessary services provided by licensed health professionals, such as registered nurses, physical therapists, or occupational therapists. These services must be ordered by a doctor and are typically required after a hospitalization due to surgery, injury, or a serious illness.
Skilled care includes things like wound treatment, IV therapy, and short-term rehab (physical, occupational, and speech therapy) delivered in a clinical setting. When people search for “rehab after a hospital stay,” this is usually what they’re describing — care in a Medicare-certified skilled nursing facility. This is not the same as custodial care, which includes assistance with daily activities like bathing, eating, or dressing. Custodial care is not covered by Medicare.
What happens to my Medicare coverage if I enter a skilled nursing facility for rehab but then need long-term care?
Medicare covers short-term skilled care, not custodial or long-term care. Once Medicare stops paying (when care is no longer skilled or you hit 100 days), you'll need to pay privately, use LTC coverage, or explore Medicaid for the costs of ongoing care. You should talk to the social worker if Medicaid is an option; otherwise, you will need to explore LTC plans.When Medicare Covers Skilled Nursing Facility (SNF) Care
To qualify for Medicare coverage of skilled nursing or rehab care, five conditions must be met (see Medicare.gov’s SNF coverage rules for the official guidance):
1. You Have Medicare Part A
Medicare Part A covers inpatient hospital stays and skilled nursing facility care. You must be enrolled in Part A for coverage to apply.
2. You Had a Qualifying Inpatient Hospital Stay
You must have been admitted as an inpatient for at least three consecutive days (not counting the discharge day). Observation status does not count, even if you stayed overnight in a hospital bed. This distinction trips up a lot of people, so always confirm your admission status with hospital staff before you leave.
I just got Medicare Part A, and I'm worried about hospital stays. How do I know if my overnight stay will be covered fully?
Medicare Part A covers hospital stays only if you are formally admitted as an inpatient, not if you’re under “observation status,” even if you stay overnight. To know if your stay will be covered, ask the hospital staff whether you’re being admitted as an inpatient and for how many days. Even with inpatient coverage, Part A has a deductible per benefit period, so it may not be fully paid unless you have supplemental coverage. A Medigap plan or Medicare Advantage plan can help cover those deductibles and reduce unexpected hospital bills.3. You Enter the SNF Within 30 Days of Hospital Discharge
You need to transfer to the skilled nursing or rehab facility within 30 days after leaving the hospital. In some cases, if it’s medically inappropriate to begin rehab sooner, the timeline can be extended. That exception isn’t automatic. Your doctor has to document that starting rehab sooner wasn’t medically appropriate, so ask the hospital’s case manager to get it in writing before you’re discharged.
4. You Need Skilled Care
Your condition must require daily skilled services that can only be provided in a SNF setting.
5. The Facility Is Medicare-Certified
The SNF must be approved by Medicare, and not all facilities are. You can verify a facility’s certification on Medicare’s Care Compare tool.
How Many Days Does Medicare Pay for Rehab or Skilled Nursing?
When all requirements are met, Medicare Part A will cover the cost of care in a skilled nursing facility. This includes a shared room, meals, skilled nursing services, physical and occupational therapy, speech-language pathology services, medications, and medical supplies needed during the stay.
The coverage does not last indefinitely. Medicare pays the full cost for the first 20 days, once the Part A deductible for that benefit period has been met. Because a qualifying SNF stay requires a 3-day inpatient admission, you’ll almost always have already paid that $1,736 deductible at the hospital. From day 21 through day 100, you are responsible for a daily copayment. That switch on day 21 is what some people call the Medicare 21-day rule for rehab: 20 covered days, then a copay. After 100 days, Medicare coverage ends entirely and you become responsible for all costs. This is what people usually mean when they refer to the Medicare 100-day rule for rehab.
The coverage is time-limited, and is often described as a hidden expense that people don’t think about until it’s too late. Here is the breakdown:
- Days 1–20 — Medicare pays 100%$0 to you
- Days 21–100 — Medicare pays partially$217/day copay
- After Day 100 — Medicare pays $0You pay all costs
Note: These numbers are for Original Medicare in 2026 and assume the $1,736 Part A deductible was already paid during the qualifying hospital stay. Medicare Advantage plans may vary.
What happens to my Medicare coverage if I enter a skilled nursing facility for rehab but then need long-term care?
For the first 20 days in Skilled Nursing, Medicare covers the cost 100%, as long as you have spent 3 days as an inpatient in the hospital before admission. If you have a Medicare Advantage plan, the 3-day requirement is usually waived.After day 20, you pay a daily copay of $217 per day until day 100, which is the maximum Medicare covers. If you have a Medicare Supplement plan, it will usually cover that cost. A Medicare Advantage plan usually has a copay nearly the same, which you will pay until you hit your plan's maximum out-of-pocket.
If you are still in Skilled Nursing beyond 100 days, you are responsible for the full cost of the care unless you have some type of Long Term Care Insurance.
How Long Can You Stay in Rehab on Medicare?
“Rehab” covers two different Medicare settings, and the day limits are not the same. Which building you’re in decides how long the coverage lasts.
A skilled nursing facility is where most people go after a hospital stay for a hip replacement, a stroke, or a bad fall. That’s the 100-day benefit described above.
An inpatient rehabilitation facility (IRF), also called a rehab hospital or acute rehab, is a step up: daily physician supervision and several hours of therapy a day. Medicare treats an IRF stay as a hospital stay, so it runs on the hospital day ladder rather than the 100-day skilled nursing ladder. Per benefit period in 2026:
| Inpatient rehab facility stay | What you pay (2026) |
|---|---|
| Days 1–60 | $0 per day, after the $1,736 Part A deductible |
| Days 61–90 | $434 per day |
| Days 91–150 | $868 per day, using your 60 lifetime reserve days |
| After day 150 | All costs |
So the honest answer to “how long will Medicare pay for rehab” is 100 days in a skilled nursing facility, or up to 90 days plus lifetime reserve days in a rehab hospital. Either way, the clock is tied to the benefit period, not the calendar.
One useful wrinkle: you don’t owe a second deductible if you transfer straight from the hospital to the rehab facility, or get admitted there within 60 days of discharge. You’re still inside the same benefit period, and that deductible is already paid.
Do Medicare Rehab and SNF Days Reset Every Year?
No. Your 100 skilled nursing days do not reset on January 1 or on the anniversary of your enrollment. Medicare hospital and SNF days don’t follow a calendar year. They operate on a benefit period system. A benefit period starts the day you’re admitted as an inpatient and ends after you’ve been out of the hospital or SNF for 60 consecutive days. Once that happens, a new benefit period begins and your coverage days reset, giving you a fresh 100 days of SNF coverage. That 60-day break is the Medicare 60-day rule. Come back a day early and you’re still in the old benefit period, spending the same 100 days.
A quick note on lifetime reserve days: Medicare’s 60 lifetime reserve days apply to inpatient hospital and rehab hospital stays only. They do not extend skilled nursing facility coverage beyond the 100-day limit. Once you hit day 100 in a SNF, you’re responsible for all costs until a new benefit period begins.
Do my Medicare hospital days reset every year?
They reset every benefit period. Medicare benefit periods under Part A start upon becoming an inpatient in the hospital and ends when you have been out of the hospital or skilled nursing facility for 60 days in a row.You also have extra lifetime days to use if you run out of days that Medicare will cover. These 60 lifetime days can only be used one time in your life.
Medicare Advantage and Medigap plans are figured differently and provide you with more days.
How a Medicare Supplement Can Help
If you’re on Original Medicare, a Medicare Supplement (Medigap) plan can significantly reduce your skilled nursing costs. Most Medigap plans, including the popular Plan G and Plan N, cover the $217/day coinsurance for days 21 through 100. Plan K and Plan L are the exceptions: they pay 50% and 75% of it, leaving you the rest. That’s a potential savings of $17,360 over an 80-day stay in a single benefit period.
Keep in mind that Medigap helps cover the copay within Medicare’s 100-day window. It does not extend SNF coverage past day 100.
Without a supplement, you’re on the hook for the full copay amount each day. For someone recovering from hip replacement surgery or a stroke, an 80-day SNF or rehab stay is not uncommon.
What happens to my Medicare coverage if I enter a skilled nursing facility for rehab but then need long-term care?
If the following conditions are met:- a qualifying hospital stay of at least 3 days
- you need specialized care
- the reason for the SNF stay is the same as the hospital stay
Then your Medicare Part A (and Medigap and most Medicare Advantage Plans) cover the first 20 days in a Skilled Nursing Facility. Days 21-100 are $217 per day. Medigap Plan G covers this cost. Medicare Advantage plans can set their own copay schedule, but in general they follow the Part A copays. Under Medicare Advantage, you pay the $217 per day (or whatever their copay schedule is) from day 21-100, or until you hit your Maximum Out Of Pocket, whichever comes first.
Once you hit day 101, Medicare no longer covers a SNF stay, so under Original Medicare, Medicare + Medigap, or Medicare + Medicare Advantage, you pay 100% of the cost.
If your SNF rehab stay turns into Long Term (custodial) care, no matter what day this happens, Medicare no longer covers the cost of the stay, so neither will Medigap or Medicare Advantage. You will have to self-pay, pay with your Long Term Care Insurance, or if on Medicaid, Medicaid may pay.
I recommend talking to a broker about your situation to understand how your specific coverage will handle this situation.
Common Reasons People Lose Coverage
Medicare may stop covering your skilled nursing care in several situations:
- Your condition improves enough that daily skilled care is no longer medically necessary. Medicare will determine that continued skilled care isn’t justified and will discontinue payment. This is the most common reason.
- You reach 100 days in a benefit period. Coverage ends automatically, and there is no extension or exception to this limit under Original Medicare.
- You voluntarily leave the facility for an extended period, or begin receiving only custodial care.
- You refuse treatment or fail to follow the care plan outlined by your healthcare provider.
If a patient had surgery with more than a 3 day stay in the hospital and needed to recover from the surgery before starting rehab, can the rehab stay be delayed by up to 90 days pending recovery?
Yes, with a couple of caveats. Medicare will pay for inpatient rehab in a skilled nursing facility, as long as the rehab stay is preceded by a 3-day stay in a hospital. This is called the "Medicare 3-day rule." And it is true that beginning the rehab stay can be delayed by up to 90 days after the hospital stay, pending recovery from the surgery. However, if the delay is longer than 30 days, it must be medically inappropriate to begin rehab sooner to remain covered. Also, the above rules apply to Original Medicare. If someone is enrolled in a Medicare Advantage plan, they will have to follow the guidelines set forth by their particular plan. Medicare Advantage members are not subject to the 3-day rule, but their plan will still have to approve any inpatient rehab stay based on medical necessity.Medicare Advantage Skilled Nursing Coverage: What’s Different
If you’re enrolled in a Medicare Advantage plan instead of Original Medicare, your skilled nursing facility benefits may look different. Medicare Advantage is required to offer the same core benefits as Original Medicare, but the plan may impose additional rules.
Prior authorization is a big one. Many Advantage plans require approval before entering a facility. Copay amounts and coverage timelines can also differ from the standard Medicare structure. Some MA plans waive the 3-day inpatient rule; others still require a qualifying hospital stay based on their own policies. Always confirm with your specific plan.
Another key difference is provider networks. Medicare Advantage plans often have a limited list of approved skilled nursing facilities, and receiving care outside that network could result in higher costs or denied coverage.
Review your plan details carefully and confirm coverage with your insurer before a skilled nursing admission, not after.
Tips to Protect Yourself
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Get documentation: Ensure your hospital stay qualifies as "inpatient" and not just "under observation." Ask the hospital staff directly about your admission status.
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Ask the facility: Confirm the nursing facility is Medicare-certified before you transfer.
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Track your days: Keep count of how many days you’ve used in a benefit period so you’re not surprised by the copay kicking in on day 21.
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Consider a supplement: A Medigap plan can cover the SNF copay gap and protect you from large out-of-pocket costs.
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Get free, unbiased help: Your State Health Insurance Assistance Program (SHIP) gives free one-on-one Medicare counseling, with nothing to sell you.
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Talk to an agent: A licensed Medicare advisor can help you understand your coverage or compare Medigap options to reduce costs.
Final Thoughts
Medicare does provide skilled nursing and short-term rehab coverage, but only under narrow conditions and for a limited time — up to 100 days per benefit period. Understanding the rules before you need the care makes all the difference. If you’re unsure about your eligibility or want to compare plans that offer better post-hospital coverage, consider speaking with a licensed Medicare agent who can walk you through your options.