Does Medicare Cover Inpatient Rehab?

Getting help shouldn’t wait because of cost. The short answer is yes—Medicare covers inpatient rehab for substance use disorders when it’s medically necessary and you’re treated in a Medicare-approved, hospital-based setting. Coverage can include medical detox, inpatient rehab services, medications given during your stay, and follow-up care—subject to the usual deductibles and coinsurance under the part of Medicare that applies to your care.

Understanding Medicare Coverage for Addiction Treatment

Medicare is federal health insurance for people 65+ and others with qualifying disabilities. Addiction is a treatable medical condition, and Medicare covers both inpatient and outpatient treatment when services are medically necessary and provided by Medicare-approved providers. Generally:
– Part A covers hospital-based inpatient care (including detox and inpatient rehabilitation).
– Part B covers outpatient services like counseling, therapy, partial hospitalization, and certain structured programs.
– Part D may cover prescription medications used to treat addiction, depending on your plan’s formulary.
– Medicare Advantage (Part C) plans must cover at least what Original Medicare covers, but with plan-specific networks, costs, and often prior authorization rules.

To qualify for inpatient rehab, your doctor must order admission, and the hospital must accept Medicare.

Medicare Part A: Inpatient Rehab Coverage

Part A covers medically necessary, hospital-based inpatient care for substance use disorders. This includes:
– Medical detox and stabilization
– Inpatient rehabilitation services
– Medications administered during your stay (including methadone if provided as part of inpatient care)
– Nursing, meals, and hospital supplies
– Therapy, counseling, and coordinated care from your treatment team

Key costs under Part A in 2025 per benefit period:
– Deductible: $1,676
– Days 1–60: $0 after the deductible
– Days 61–90: $419 per day
– Days 91–150: $838 per day (lifetime reserve days, up to 60 total in your lifetime)
– After day 150: you pay all costs.

Important: Doctors’ services you receive while hospitalized are generally billed under Part B (80% covered by Medicare after the Part B deductible), so you may also owe Part B coinsurance for physician services.

Example costs:
– 5-day detox admission: You’ll pay the Part A deductible of $1,676 (if a new benefit period), with $0 coinsurance for facility charges on days 1–60. You may also owe Part B coinsurance for physician services if you haven’t met your Part B deductible.
– 65-day rehab stay: Part A deductible $1,676 + 5 days of coinsurance at $419/day for days 61–65 = $2,095, plus any applicable Part B physician charges.

Medicare Part B: Outpatient Treatment and Services

Part B covers:
– Individual and group counseling/therapy
– Intensive outpatient programs (IOP) and partial hospitalization (PHP)
– Screening and brief interventions
– Certain telehealth services
– Physician services during hospital stays (Part B billing)
– Alcohol misuse screenings once per year and, if indicated, up to 4 brief, face-to-face counseling sessions per year in a primary care setting at no cost if your provider accepts assignment.

Costs: After the annual Part B deductible ($257 in 2025), you generally pay 20% coinsurance of the Medicare-approved amount for outpatient services if your provider accepts assignment.

Medicare Part D: Medication Coverage for Addiction

Part D plans may cover prescription medications used in addiction treatment such as buprenorphine/naloxone, naltrexone, and related therapies, subject to your plan’s formulary and rules. Methadone for opioid use disorder is typically covered under Part B when provided by an Opioid Treatment Program (OTP) and under Part A if administered during an inpatient hospital stay—not by Part D. Always check your plan’s formulary and coverage rules.

Important Limitations and What Medicare Doesn’t Cover

-.
-.
-.
– Transportation: Non-emergency transportation to/from rehab is generally not covered unless it meets strict criteria.
– Alternative or luxury services: Services not deemed medically necessary (e.g., certain alternative therapies or luxury amenities) are typically excluded.

If you need help with costs, Medicaid (if you qualify) can pay Medicare deductibles and coinsurance and may cover services Medicare doesn’t. People with both Medicare and Medicaid (“dual eligible”) often have little to no out-of-pocket costs for covered services.

Medicare Advantage vs. Original Medicare for Rehab

All Medicare Advantage (MA) plans must cover at least what Original Medicare covers. Key differences:
-.
-.
-.
– Extras: Some MA plans may offer supplemental benefits (e.g., transportation), which Original Medicare doesn’t.

Choose based on provider access, prior authorization requirements, and your expected out-of-pocket costs.

How to Use Your Medicare Benefits for Rehab Treatment

Follow these steps:
1..
2. Get a doctor’s order: Your physician should document medical necessity for inpatient rehab/detox.
3..
4..
5..
6. Keep documentation: Save your plan approvals and hospital paperwork; this helps if you need to appeal a denial.

You can also use Medicare’s Care Compare to search for Medicare-certified inpatient rehabilitation facilities and hospitals in your area.

Frequently Asked Questions About Medicare and Inpatient Rehab

1) Does Medicare cover inpatient rehab for drug and alcohol addiction?
Yes. Part A covers hospital-based inpatient care, including medical detox and rehab services, when medically necessary and provided at a Medicare-approved facility. Doctors’ services during your stay are typically billed under Part B. The 190‑day lifetime limit applies only to freestanding psychiatric hospitals, not to general hospitals or their psychiatric units.

2) What’s the difference between Part A and Part B coverage for rehab?
Part A covers inpatient hospital services (room, nursing, medications administered in the hospital, detox, and inpatient rehab). Part B covers outpatient services such as counseling, therapy, partial hospitalization, IOP, and physician services—including those provided while you’re an inpatient. Part B also covers one annual alcohol misuse screening and up to 4 brief counseling sessions when indicated.

3) How much will I pay out-of-pocket for inpatient rehab with Medicare?
In 2025, you’ll pay the Part A deductible ($1,676) per benefit period. Days 1–60 have $0 coinsurance; days 61–90 cost $419/day; days 91–150 cost $838/day using lifetime reserve days. After day 150, you pay all costs. You may also owe the Part B deductible ($257) and 20% coinsurance for physician services during your stay.

4) Does Medicare cover residential treatment or only hospital-based rehab?
Original Medicare primarily covers hospital-based inpatient treatment and inpatient rehabilitation facilities. Non-hospital residential programs are generally not covered. Some Medicare Advantage plans may offer additional benefits, but availability and rules vary; check your plan’s network and authorization requirements.

5) What is the 190-day lifetime limit, and does it apply to addiction treatment?
The 190-day lifetime limit applies only to inpatient care in freestanding psychiatric hospitals. It doesn’t apply to psychiatric units within general hospitals or to non-psychiatric inpatient hospital stays. Many addiction-related hospitalizations occur in general hospitals or rehab units where the 190-day limit does not apply.

6) Does Medicare Advantage cover rehab differently than Original Medicare?
Yes. MA plans must cover at least what Original Medicare covers but often require you to use in-network facilities, obtain prior authorization, and follow plan rules. Costs (copays/coinsurance) and the annual out-of-pocket maximum vary by plan. Always confirm coverage and pre-authorization with your plan before admission.

7) What medications for addiction treatment does Medicare cover?
– Part B: Covers methadone, buprenorphine, naltrexone, and related services when provided through an enrolled Opioid Treatment Program; typically no copayments at OTPs, though the Part B deductible may apply to supplies/medications.
– Part A: Covers medications administered during an inpatient stay.
– Part D: May cover buprenorphine, naloxone, and naltrexone, depending on the plan’s formulary. Methadone for OUD is generally not covered by Part D but is covered under Part B via OTPs and under Part A when inpatient.

8) How do I know if a rehab facility accepts Medicare?
Confirm the hospital or inpatient rehabilitation facility is Medicare-certified and accepts Medicare. Call the facility directly, and use Medicare’s Care Compare to find participating facilities. If you have Medicare Advantage, verify the facility is in-network and obtain prior authorization as required.

9) Can I use Medicare and Medicaid together for rehab?
Yes. If you have both, Medicare pays first for Medicare-covered services. Medicaid may pay Medicare deductibles and coinsurance and can cover benefits Medicare doesn’t. This can significantly reduce or eliminate out-of-pocket costs if you meet state Medicaid eligibility requirements.

10) What happens if Medicare or my plan denies coverage for rehab?
Common reasons include services deemed not medically necessary or care at a non-approved facility. You have the right to appeal. For Medicare Advantage, request an organization determination and appeal if denied. Keep all documentation and ask your doctor to provide medical necessity support. You can also get free assistance from your State Health Insurance Assistance Program (SHIP).

Getting Help: Next Steps for Medicare Beneficiaries

If you or a loved one needs inpatient rehab, help is available and Medicare can be part of your path to recovery. Confirm your coverage, choose a Medicare-approved hospital or inpatient rehabilitation facility, and work with your doctor to document medical necessity. For plan-specific questions and authorizations, contact your Medicare Advantage plan directly. You can also explore Medicare’s Care Compare to find facilities and the SAMHSA resources to locate treatment programs in your area. Don’t wait—timely care improves safety and outcomes.