Medicare covers inpatient rehabilitation after surgery, but only if you meet specific conditions and your doctor orders it as medically necessary

Medicare Part A covers a stay in an inpatient rehabilitation facility (IRF) after surgery if three things are true: you spent at least three days in the hospital as an inpatient, your doctor orders rehabilitation as medically necessary, and you are admitted to the IRF within 30 days of leaving the hospital. You pay a copay for days 1–20 (currently $0), and then $194.50 per day for days 21–100 in 2024, though this amount changes yearly. After day 100, you pay all costs yourself.

Medicare does not cover outpatient rehabilitation (therapy you receive at a clinic or your home without an overnight hospital stay) under the same rules. Instead, outpatient therapy is covered under Part B, with different limits and copays. Many seniors need both — inpatient rehab first, then outpatient therapy to continue at home — and understanding which type you may have access to for matters because the costs and time limits are different.

Key Takeaways

  • Inpatient rehabilitation after surgery is covered by Medicare Part A only if you spent at least three days in the hospital first and are admitted to a rehabilitation facility within 30 days.
  • You pay nothing for the first 20 days of inpatient rehab, then $194.50 per day (in 2024) for days 21–100; Medicare stops covering after day 100.
  • Outpatient therapy (at a clinic or your home) is covered under Medicare Part B with a separate copay and annual limits, not under the inpatient rehab rules.
  • Your doctor must order rehabilitation as medically necessary; Medicare will not cover it if you straightforward want therapy or if you are stable enough to go home.
  • The rehabilitation facility must be Medicare-certified; not all rehabilitation centers accept Medicare, so confirm before admission.

The three-day hospital stay requirement

Medicare's three-day rule is strict: you must be admitted to the hospital as an inpatient (not observation status) for at least three consecutive days before you can move to an inpatient rehabilitation facility and have Medicare pay for it. The three days count from midnight of your admission day through midnight of your discharge day. If you are in the hospital for observation only — a status that looks like a hospital stay but is technically outpatient — those days do not count toward the three-day requirement.

This distinction matters because many seniors after surgery are placed in observation status instead of inpatient admission, especially if their surgery was minor or their recovery is quick. If this happens to you, ask your doctor or the hospital billing department whether you are admitted as an inpatient or on observation status. If you are on observation and your doctor believes you need inpatient rehabilitation, discuss with your medical team whether an inpatient admission is appropriate, because observation days will not satisfy Medicare's requirement.

The three days must occur within 30 days before you are admitted to the rehabilitation facility. If you are discharged from the hospital and go home for 31 days before entering rehab, Medicare will not cover the rehabilitation stay, even if your doctor still thinks you need it.

What "medically necessary" means for post-surgery rehab

Medicare will only pay for inpatient rehabilitation if your doctor documents that it is medically necessary — meaning you cannot safely return home and live independently without intensive therapy. After surgery, this usually means you cannot walk, bathe, dress, or use the toilet without help, and you need 24-hour nursing care and therapy from multiple disciplines (physical therapy, occupational therapy, speech therapy, or others) to regain function.

If you can go home and receive outpatient therapy a few times a week, Medicare considers you well enough for outpatient care, not inpatient rehab. The rehabilitation facility's medical team will assess you when you arrive and decide whether you truly need inpatient-level care. If they determine you do not, they may discharge you and refer you to outpatient therapy instead, and Medicare will not pay for the inpatient days you already spent there.

Your surgeon's recommendation carries weight, but it is not the final word. The rehabilitation facility's doctors make the admission decision based on Medicare's rules, not on what your surgeon prefers. If you disagree with a discharge decision or denial of admission, you have the right to appeal, and your hospital social worker or the facility's patient advocate can help you understand the process.

Inpatient versus outpatient rehabilitation coverage

Inpatient rehabilitation (staying overnight at a facility) and outpatient rehabilitation (therapy at a clinic or your home) are covered under different Medicare rules and have different costs. Inpatient rehab is Part A coverage with the copay structure described above. Outpatient therapy is Part B coverage, and you typically pay 20% of the approved amount after you meet your Part B deductible (currently $240 in 2024).

Outpatient therapy also has an annual limit. In 2024, Medicare covers up to 60 visits per year for physical therapy and speech-language pathology combined, and up to 60 visits per year for occupational therapy, though your doctor can request more visits if medically necessary. Inpatient rehab does not have a per-visit limit, but it does have the 100-day maximum stay limit per benefit period.

Many people need both: they spend time in an inpatient facility to regain basic function after surgery, then continue with outpatient therapy at home or a clinic to build strength and independence. Your discharge plan from the inpatient facility should spell out what outpatient therapy is recommended and for how long.

How to confirm the facility accepts Medicare

Not all rehabilitation facilities are Medicare-certified. Before you are admitted or transferred to a rehabilitation facility, confirm that it accepts Medicare and is certified to provide the level of care you need. Your hospital's discharge planner or social worker can tell you which facilities in your area are Medicare-certified and have bed availability.

You can also search the Medicare Care Compare tool on Medicare.gov, which lists certified inpatient rehabilitation facilities by location and shows their quality ratings and staffing information. The tool does not tell you bed availability, but it does confirm which facilities are Medicare-approved.

If you are transferred to a facility that is not Medicare-certified, Medicare will not pay for your stay, and you will be responsible for the full cost. This can happen if a facility loses its certification or if you are admitted to a facility your insurance company recommends without checking its Medicare status first. Always verify before admission.

Your costs during inpatient rehabilitation

If you have Original Medicare (Part A and Part B), your costs for inpatient rehabilitation are straightforward. Days 1–20 have no copay. Days 21–100 cost $194.50 per day in 2024 (this amount increases yearly). After day 100 in a benefit period, you pay all costs. A benefit period begins the day you enter the hospital and ends 60 days after you leave the hospital or rehabilitation facility.

If you have a Medigap (supplemental insurance) policy, it may cover some or all of your copays for days 21–100, depending on which Medigap plan you have. If you have a Medicare Advantage plan (Part C), your costs may be different — your plan sets its own copays and may have different rules about which facilities you can use. Check your plan documents or call your plan's customer service before admission to understand your exact costs.

These costs cover room, board, nursing care, therapy, and most medications while you are in the facility. They do not cover any care after you leave the facility or any services not ordered by your doctor.

What happens if Medicare denies your rehabilitation stay

If Medicare denies coverage for your inpatient rehabilitation stay — either before you are admitted or after you arrive — you have the right to appeal. The rehabilitation facility must give you a notice explaining why coverage was denied and telling you how to appeal. This notice is called a Notice of Non-Coverage or similar language depending on the facility.

You have several appeal options. You can ask the facility to reconsider the decision (called a redetermination). You can also ask for a peer-to-peer review, in which your doctor speaks directly with a Medicare medical reviewer to discuss whether the stay is medically necessary. If you disagree with the appeal decision, you can request a hearing before an administrative law judge. Your hospital social worker or the facility's patient advocate can help you understand these options and file an appeal if you choose to do so.

While an appeal is pending, you may be responsible for paying for your stay out of pocket, though some facilities will hold off billing while the appeal is in process. Ask the facility's billing department about their policy before you decide whether to appeal.

Frequently Asked Questions

Does Medicare cover rehabilitation at home after surgery?

Medicare Part B covers outpatient physical therapy, occupational therapy, and speech therapy at your home if your doctor orders it and you are homebound or cannot travel to a clinic. Home health therapy is not the same as inpatient rehabilitation and has different copays and visit limits. You typically pay 20% of the approved amount after your Part B deductible.

What if I need more than 100 days of inpatient rehabilitation?

Medicare Part A stops paying after 100 days in a benefit period. If you need more inpatient care, you would pay out of pocket, or your supplemental insurance (Medigap) or Medicare Advantage plan might cover some costs. Discuss this possibility with your doctor and the facility's social worker before you reach day 100 so you can plan ahead.

Can I choose which rehabilitation facility I go to?

You have the right to choose a Medicare-certified facility, but your choice may be limited by bed availability, your insurance network (if you have a Medicare Advantage plan), and whether the facility accepts your insurance. Your hospital's discharge planner will usually present you with options in your area. If you have a strong preference for a specific facility, tell your discharge planner early so they can check availability.

Does Medicare cover rehabilitation after outpatient surgery?

No. Inpatient rehabilitation is only covered if you spent at least three days in the hospital as an inpatient first. If you had outpatient surgery and go home the same day, you do not meet the three-day requirement, even if your doctor thinks you need intensive rehabilitation. You would need outpatient therapy instead, covered under Part B with different rules and copays.

Will my Medigap or Medicare Advantage plan cover rehabilitation differently?

Medigap plans cover some or all of your copays for inpatient rehabilitation, depending on which plan you have. Medicare Advantage plans set their own rules and copays for rehabilitation and may require you to use in-network facilities. Review your plan documents or call your plan's customer service before admission to understand your coverage and costs.