What to do When Medicare Runs Out for Rehab

Being told that Medicare is about to stop paying is not the same as being told your treatment is over, and the two get confused at exactly the moment it matters most. There is usually a deadline attached, often 48 hours or less, and there is usually an appeal available. This page covers the four reasons Medicare stops paying for a rehab stay, how to work out where your day count actually stands, and how to file a fast appeal before the window closes. For what Medicare covers in the first place, and what it costs in 2026, start with our guide to Medicare coverage for drug and alcohol rehab.

In This Article:

• Why your coverage ended sooner than you expected
• The four reasons Medicare stops paying
• How to appeal a Medicare coverage decision
• The day counts people get told, and what they mean
• When a new benefit period starts
• What to do in the next 48 hours
• Paying for care Medicare will not cover
• Frequently asked questions

Why your coverage ended sooner than you expected

Almost always, because the count did not start where you thought it did. Medicare measures inpatient care in benefit periods rather than calendar years, and the benefit period you are in probably opened before anyone arrived at a rehabilitation facility.

Your hospital days came out of the same 90

Medicare states that if you move into an inpatient rehabilitation facility directly after a hospital stay, or within 60 days of leaving one, your benefit period started on day one of that hospital stay.¹ The hospital days were not separate. They came out of the same 90.

Someone who spent 21 days in a hospital stabilizing and then transferred to inpatient rehabilitation did not arrive with 90 covered days. They arrived with 69, and they were already 21 days closer to the point where daily coinsurance starts on day 61. Nobody hides this, but nobody explains it either, and it is the single most common reason a family is surprised by a discharge date.

How to find out where you actually stand

Call the facility’s billing department rather than the nursing station, and ask three questions. What day of the current benefit period is today. How many lifetime reserve days have already been used. And whether the stay is being billed as inpatient hospital care or as skilled nursing care, because the day limits are different. You are entitled to all three answers, and together they determine everything about what happens next.

The four reasons Medicare stops paying

Running out of days is only one of four, and it is not the most common. Two of the four can be challenged and two cannot, so identifying which one you are dealing with is the first useful thing you can do.

The days are genuinely used up

Once you pass day 150 of a benefit period, having drawn on all 60 lifetime reserve days, Part A pays nothing further until a new benefit period opens.² There is no appeal against arithmetic. What there is instead is a defined path to a new benefit period, covered further down this page.

Your care was ruled no longer medically necessary

This is the common one, and it happens with days still on the clock. Medicare pays for inpatient rehabilitation only while a physician certifies that you need intensive rehabilitation, continued medical supervision and coordinated care from your providers.¹ When the clinical team decides that threshold is no longer met, coverage stops, whether you are on day 12 or day 80.

A judgment about medical necessity is a clinical opinion, and clinical opinions can be reviewed by someone outside the facility. If this is the reason you were given, you have an appeal available and a short deadline to use it.

You did not meet the three-day hospital rule

Skilled nursing coverage sometimes never starts at all. Medicare requires a prior medically necessary inpatient hospital stay of at least three days in a row before it will pay for a skilled nursing admission.³ A stay billed as observation does not count, however many nights you spent in the building, and this is where the rule bites: patients are routinely held under observation status without being told what it means for later coverage.

Some Accountable Care Organizations and some Medicare Advantage plans waive the requirement. On Original Medicare it applies. If a transfer to a skilled nursing facility is being discussed, ask the hospital to confirm your inpatient status in writing before you move.

The program was never a setting Medicare covers

For people seeking addiction treatment specifically, this is the reason with nothing to do with days. Medicare pays for inpatient behavioral health care in a general hospital or a psychiatric hospital, and freestanding residential addiction treatment centers are not among the settings it lists.⁴ If you are being billed for a residential stay you believed was covered, the benefit did not run out. It was never there. Our Medicare coverage guide explains which settings do bill Medicare and how to check a program before you admit.

How to appeal a Medicare coverage decision

If the reason given was medical necessity, you have the right to a fast appeal decided by an independent reviewer rather than by the facility.⁵ The deadlines are measured in hours, so this is worth acting on the same day you are told.

The notice you should receive

In a skilled nursing facility, a rehabilitation facility or home health care, you should be handed a Notice of Medicare Non-Coverage at least two days before services end. In a hospital, you should receive a document called An Important Message from Medicare about Your Rights within two days of admission and again before discharge. Both carry your appeal rights and the phone number for the reviewer in your state.⁵

If nobody has given you one and you are being told coverage is ending, ask for it directly. The notice is what starts the clock, and a deadline you were never told about is worth raising with the reviewer when you call.

How to file the fast appeal

Appeals go to a Beneficiary and Family Centered Care Quality Improvement Organization, usually shortened to BFCC-QIO, which Medicare contracts to either Acentra or Commence depending on your state.⁵ The number is printed on your notice. You can call, or a family member or the person’s representative can call on their behalf.

The deadline depends on the setting. In a skilled nursing or rehabilitation facility, you must request the appeal by noon on the day before coverage is set to end. In a hospital, you must request it by the day you are scheduled for discharge. Decisions are fast: by close of business the day after the reviewer has what it needs in most settings, and within one day in a hospital.⁵

What you pay while it is decided

If you filed on time in a hospital, you can stay while you wait, and you will not be charged for the stay beyond any coinsurance or deductible that already applied.⁵ If the reviewer agrees with the hospital, you are still not responsible for charges incurred through noon of the day after the decision is issued. Services after that point can be billed to you.

If you lose, and if you have Medicare Advantage

A fast appeal is the first level, not the only one. Medicare has further appeal levels beyond the BFCC-QIO, and the notice you received explains how to move to the next. On a Medicare Advantage plan the route is different: the plan runs its own expedited appeal on its own timeline. Call the number on the plan card, ask specifically for an expedited or fast-track appeal, and ask the plan to send you the criteria it applied to your case, which you are entitled to see.

The day counts people get told, and what they mean

Three numbers circulate and they belong to different benefits, which is why advice from friends and older articles so often does not match what a facility is telling you. Ninety days is the inpatient hospital and rehabilitation limit. One hundred days is skilled nursing. Twenty-one days is the point in a skilled nursing stay where you start paying a daily amount.

Skilled nursing is a different benefit from inpatient rehabilitation, with its own day count and its own cost tiers.^3,6 For the inpatient hospital and rehabilitation figures, and the rest of what Medicare charges for addiction treatment in 2026, see what you will pay with Medicare.

Does the 100 days reset every year?

No, and this is worth being precise about because people plan around it. The 100 days resets per benefit period, and a benefit period ends only after 60 consecutive days without inpatient hospital or skilled nursing care. A January admission does not hand anyone a fresh 100 days. A real 60-day break does.

When a new benefit period starts

Sixty consecutive days with no inpatient hospital care and no skilled care in a nursing facility closes the current benefit period. A later admission opens a new one, with a fresh 90 days and a new deductible. There is no annual cap on how many benefit periods you can have.

That matters practically rather than theoretically. If days are the binding constraint and the clinical team agrees more inpatient care will be needed later, the 60-day count is something to plan around deliberately with the discharge planner, alongside whatever outpatient care fills the gap. Outpatient treatment does not interrupt the 60 days. Another inpatient or skilled nursing admission does, and restarts the wait.

What to do in the next 48 hours

If you have just been told coverage is ending, the order of these matters more than the detail of any one of them.

1. Ask which of the four reasons applies, and get the answer in writing.
2. Ask for the Notice of Medicare Non-Coverage if you have not been given one.
3. If the reason is medical necessity, call the BFCC-QIO number on that notice today.
4. Ask billing for your benefit period day count and lifetime reserve days used.
5. Ask the clinical team what level of care they are recommending next, and whether Medicare covers it.
6. Do not sign a private-pay agreement until the appeal is resolved or you have decided not to file one.

If a transition to outpatient care is what comes next, how outpatient rehab works covers what intensive outpatient and partial hospitalization involve day to day, and how to get into rehab covers wait times and what can start this week.

Paying for care Medicare will not cover

Once you know which reason applies, the question becomes what fills the gap. One option attaches directly to the cost tiers on this page and the rest are covered properly elsewhere on this site.

Medicare Supplement Insurance, usually called Medigap, exists for exactly this. Every standardized Medigap plan covers the Part A coinsurance for days 61 to 90 and for lifetime reserve days, and adds 365 extra lifetime inpatient days once your Medicare days are exhausted. Most plans also cover the Part A deductible. What Medigap cannot do is cover a setting Medicare does not cover, so it does not help with a freestanding residential program, and it generally cannot be added mid-crisis because guaranteed-issue rights are limited to specific enrollment windows.

Beyond that: many people on Medicare also qualify for Medicaid, which covers levels of care Medicare does not, and being dually eligible is worth checking even if you assume your income is too high. See Medicaid coverage for rehab, and the dual eligibility section of our Medicare guide. For nonprofit hospital financial assistance, a written good faith estimate and the right to dispute a bill, sliding scale fees, scholarships and payment plans, see how to cover what insurance does not pay for rehab.

Frequently asked questions

What happens when Medicare rehab benefits run out?

You become responsible for the cost of continued inpatient care, and the facility decides whether to discharge you or keep you on a private-pay basis. If coverage is ending because care was ruled no longer medically necessary, you can request a fast appeal first. If your days are genuinely used up, a new benefit period opens after 60 consecutive days without inpatient or skilled nursing care.

Can Medicare kick you out of rehab?

Medicare does not discharge anyone. It stops paying, either because your covered days are used or because your provider no longer certifies the level of care as medically necessary. The facility then makes the discharge decision. If the reason given is medical necessity, you have the right to a fast appeal and should receive written notice at least two days before coverage ends.

How long do I have to appeal a Medicare discharge from rehab?

In a skilled nursing or rehabilitation facility, until noon on the day before coverage is set to end. In a hospital, until the day you are scheduled for discharge. The phone number for the reviewer is printed on the notice you should have been given, and a family member or representative can make the call for you.

Will Medicare pay for a transfer from one rehab facility to another?

A transfer does not restart your day count. You carry the same benefit period and the same used days into the receiving facility, and that facility’s coverage rules apply. A move from a hospital to a skilled nursing facility also has to satisfy the three-day qualifying inpatient stay requirement.

Does Medicare cover rehab after a hospital stay?

Yes, in an inpatient rehabilitation facility when a physician certifies you need intensive rehabilitation and coordinated care, or in a skilled nursing facility after a qualifying three-day inpatient stay. In both cases the hospital days count toward the same benefit period, so you begin the rehabilitation stay with fewer than 90 days remaining.

How many times will Medicare pay for rehab?

There is no lifetime limit on the number of benefit periods, so there is no cap on how many separate inpatient rehabilitation stays Medicare can cover, provided each is medically necessary and separated by the 60-day break. The two lifetime limits that do exist are the 60 lifetime reserve days and, for freestanding psychiatric hospitals only, a 190-day lifetime maximum.

You Might Like

• Does Medicare Cover Drug and Alcohol Rehab?
• How to Cover What Insurance Doesn’t Pay for Rehab
• Does Medicaid Cover Drug and Alcohol Rehab?
• How to Get Into Rehab: Wait Times and What Can Start Today

Sources

1. Medicare.gov. Inpatient rehabilitation care. Centers for Medicare & Medicaid Services. Accessed August 27, 2026. https://www.medicare.gov/coverage/inpatient-rehabilitation-care
2. Medicare.gov. Inpatient hospital care. Centers for Medicare & Medicaid Services. Accessed August 27, 2026. https://www.medicare.gov/coverage/inpatient-hospital-care
3. Medicare.gov. Skilled nursing facility (SNF) care. Centers for Medicare & Medicaid Services. Accessed August 27, 2026. https://www.medicare.gov/coverage/skilled-nursing-facility-snf-care
4. Medicare.gov. Inpatient mental health care. Centers for Medicare & Medicaid Services. Accessed August 27, 2026. https://www.medicare.gov/coverage/mental-health-care-inpatient
5. Medicare.gov. Fast appeals. Centers for Medicare & Medicaid Services. Accessed August 27, 2026. https://www.medicare.gov/providers-services/claims-appeals-complaints/appeals/fast-appeals
6. Centers for Medicare & Medicaid Services. 2026 Medicare Parts A & B Premiums and Deductibles. Published November 2025. Accessed August 27, 2026. https://www.cms.gov/newsroom/fact-sheets/2026-medicare-parts-b-premiums-deductibles