Medicare covers inpatient rehabilitation, but only under specific conditions

Medicare Part A covers a stay in an inpatient rehabilitation facility (IRF) if you meet three conditions: you have had a may have access to hospital stay of at least three days, your doctor orders inpatient rehab as medically necessary, and you are admitted to an IRF within 30 days of leaving the hospital. The facility itself must be Medicare-certified. Medicare does not cover all rehabilitation stays — it depends on your diagnosis, your functional ability, and whether the facility meets federal standards.

The key difference from other settings: inpatient rehab is a hospital-level facility where you stay overnight and receive intensive therapy (usually three or more hours per day). It is not the same as outpatient therapy, skilled nursing facility care, or home health. Each has different Medicare rules and costs.

Key Takeaways

  • You must have spent at least three consecutive days in a hospital before Medicare will cover an inpatient rehab stay.
  • Your doctor must order inpatient rehab as medically necessary, and you must be admitted within 30 days of hospital discharge.
  • Medicare Part A covers the facility costs, but you pay a copay for each day after day 60, and all costs after day 100 in a benefit period.
  • The facility must be Medicare-certified and must admit you based on medical need, not your ability to pay.
  • Common diagnoses that may have access to include stroke, hip fracture, spinal cord injury, and major surgery recovery, but the decision depends on your individual condition.

The three-day hospital stay requirement

Before Medicare will cover inpatient rehab, you must have been an inpatient in a hospital for at least three consecutive days. This means three full days and nights — the day you are admitted does not count toward the three days. If you are admitted on a Monday and discharged on Thursday, that counts as three days (Tuesday, Wednesday, Thursday).

Observation stays do not count. If you were in the hospital on "observation status" rather than admitted as an inpatient, those days do not satisfy the three-day requirement, even if you spent three calendar days in the building. This is a common source of confusion and denial. You can check your hospital paperwork or call the hospital billing department to confirm whether you were admitted as an inpatient or held on observation.

The three-day stay must happen when ready before the rehab admission. If you go home for a week and then enter rehab, the three-day requirement still applies, but the clock does not restart — you still need those three days from your most recent hospital stay.

What diagnoses and conditions typically may have access to

Medicare does not publish a fixed list of diagnoses that automatically may have access to for inpatient rehab. Instead, the facility and your doctor must document that you have a condition requiring intensive, coordinated therapy that cannot be delivered safely in an outpatient or skilled nursing setting. The decision is based on your functional ability and medical complexity, not the diagnosis alone.

Conditions that frequently lead to inpatient rehab admission include stroke, hip fracture, knee or hip replacement, spinal cord injury, traumatic brain injury, amputation, and recovery from major surgery. Conditions like pneumonia, urinary tract infection, or straightforward fracture treatment alone typically do not may have access to. The facility will review your hospital records and your current functional status before deciding whether to admit you.

If your doctor orders inpatient rehab but the facility denies admission, you have the right to appeal. The denial letter will explain the reason. You can ask your doctor to provide additional documentation of your medical complexity or functional limitations, or you can request a second opinion from another Medicare-certified IRF.

Medicare Part A coverage and your out-of-pocket costs

Medicare Part A covers the full cost of inpatient rehab for days 1 through 60 of your stay in each benefit period. You pay nothing for these days — no copay, no deductible. A benefit period begins the day you are admitted to the hospital and ends 60 days after you are discharged from the hospital or inpatient rehab facility, whichever is later.

For days 61 through 100, you pay a daily copay. The amount changes each year; in 2024 it is $194 per day, but confirm the current amount with your plan or Medicare. After day 100 in a benefit period, Medicare stops paying, and you are responsible for all costs. Most inpatient rehab stays last 10 to 21 days, so many people never reach day 61.

If you have a Medigap or Medicare Advantage plan, your supplemental coverage may pay some or all of your copays. Check your plan documents or call your plan to confirm what they cover for inpatient rehab.

How to move from hospital to inpatient rehab

The hospital discharge planner or social worker usually starts the process before you leave the hospital. They will contact Medicare-certified inpatient rehab facilities in your area, explain your condition, and ask whether they will admit you. The facility reviews your hospital records and makes the decision. This process typically takes one to three days.

You do not choose the facility yourself — the hospital works with facilities that have bed availability and accept your insurance. If you have a preference, tell the discharge planner, and they will try to accommodate it, but the facility must agree to admit you first. Once a facility accepts you, the hospital arranges transport, and you are admitted within one to three days of hospital discharge.

If no inpatient rehab facility will admit you, or if you do not meet the three-day requirement, the hospital may offer skilled nursing facility care instead. Skilled nursing facilities have different Medicare rules and typically provide less intensive therapy. Ask the discharge planner to explain the difference and why inpatient rehab is or is not an option for you.

What happens if Medicare denies your inpatient rehab stay

A denial can happen for two reasons: the facility decides you do not meet medical necessity criteria, or Medicare reviews the stay after admission and decides it should not have been covered. If the facility denies you before admission, you can ask your doctor to appeal or seek a second opinion from another facility.

If Medicare denies the stay after you have already been admitted and received care, you will receive a notice called a Notice of Non-Coverage. This notice explains why Medicare believes the stay was not medically necessary. You have the right to appeal. You can ask for a detailed explanation, request that your doctor provide additional medical justification, or ask for an independent review by a Quality Improvement Organization (QIO). The QIO is a contractor hired by Medicare to review coverage decisions.

While an appeal is pending, you may be responsible for the facility's charges. Some facilities will hold off billing you until the appeal is resolved. Ask the facility's billing department about their policy. If you disagree with a denial, do not straightforward accept it — the appeal process exists to protect you.

Inpatient rehab versus skilled nursing and outpatient therapy

Inpatient rehabilitation, skilled nursing facility care, and outpatient therapy are three different settings with different Medicare rules. Inpatient rehab is a hospital-level facility where you stay overnight and receive three or more hours of therapy per day. Medicare Part A covers it after a three-day hospital stay. Skilled nursing facilities provide less intensive therapy (usually one to two hours per day) and are often used for recovery after surgery or illness. Medicare Part A also covers skilled nursing, but the rules are different and the copay structure varies. Outpatient therapy happens in a clinic or at home and does not require an overnight stay; Medicare Part B covers it separately.

Your doctor and the discharge planner will recommend the setting that matches your medical needs. If you are recovering from a stroke and need intensive physical and occupational therapy, inpatient rehab is likely the right choice. If you are recovering from a straightforward fracture and need basic nursing care plus some therapy, skilled nursing may be sufficient. If you are stable and can manage at home with a few therapy sessions per week, outpatient therapy may be the plan.

Frequently Asked Questions

Do I have to go to inpatient rehab if my doctor recommends it?

No. You can refuse inpatient rehab and choose skilled nursing, outpatient therapy, or home care instead. However, if you refuse and later need more intensive care, you may have to pay out of pocket or wait for another hospital stay to may have access to again. Discuss the options with your doctor and discharge planner before deciding.

What if I was on observation status in the hospital — can I still go to inpatient rehab?

Not under Medicare Part A coverage. Observation status does not count toward the three-day requirement. You may still be admitted to inpatient rehab, but you would pay out of pocket or use another insurance. Ask the hospital to convert your status to inpatient admission if possible, or ask the facility whether they will admit you under a different payment arrangement.

How long does a typical inpatient rehab stay last?

Most stays last 10 to 21 days, depending on your progress and the complexity of your condition. The facility and your doctor will set goals for your therapy and discharge. If you are progressing well, you may be discharged earlier. If you need more time, the stay may be extended, but Medicare must continue to find it medically necessary.

Will my Medicare Advantage plan cover inpatient rehab the same way as Original Medicare?

Medicare Advantage plans must cover inpatient rehab at least as well as Original Medicare does, but the details vary by plan. Some plans may have different copays, require prior authorization, or limit the facilities you can use. Check your plan documents or call your plan before admission to understand your costs and any requirements.

What if the inpatient rehab facility is out of network for my Medicare Advantage plan?

Medicare Advantage plans can restrict which facilities you use. If the recommended facility is out of network, ask your discharge planner to find an in-network facility, or contact your plan to ask whether they will cover an out-of-network stay. Some plans will cover out-of-network care in emergencies or when no in-network option is available, but you may pay more.