When someone you love needs treatment for addiction, the first thing you're probably trying to find out is whether Medicare covers drug and alcohol rehab. It does. Medicare pays for medically necessary treatment for substance use disorders, and the coverage is split across the parts of Medicare you already have.
In This Guide
- Key Takeaways
- Does Medicare Cover Drug and Alcohol Rehab?
- What Part A Covers: Inpatient Treatment
- What Part B Covers: Outpatient Counseling and Therapy
- Opioid Treatment Programs and the No-Copay Bundle
- What Part D Covers: The Medications
- How Medicare Covers Drug and Alcohol Rehab Costs
- Frequently Asked Questions
- Learn More
Does Medicare Cover Drug and Alcohol Rehab?
Yes. Medicare covers medically necessary treatment for substance use disorders, and that includes both drug addiction and alcohol addiction.Centers for Medicare & Medicaid Services. (n.d.). Opioid Use Disorder treatment services coverage — Medicare.gov. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/opioid-use-disorder-treatment-services So the real question isn't whether you're covered. It's which part of your Medicare pays, because the answer depends on where you get the treatment and what kind it is.
Here's the short version. If you're admitted to a hospital, that's Part A. If you're getting counseling and therapy as an outpatient, that's Part B. If it's opioid treatment through a specialized program, that's a Part B benefit with its own rules. And the prescription medications are Part D. The rest of this guide walks through each one and what you'd actually pay.
What Part A Covers: Inpatient Treatment
Part A is your hospital insurance, and it covers substance use and mental health treatment you get when you're admitted to a hospital as an inpatient.Centers for Medicare & Medicaid Services. (n.d.). Opioid Use Disorder treatment services coverage — Medicare.gov. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/opioid-use-disorder-treatment-services That's the setting for someone who needs medically supervised detox or round-the-clock care, not just an appointment.
The cost side works like any other inpatient hospital stay. You pay the Part A inpatient hospital deductible, which is $1,736 per benefit period in 2026, and that covers your first 60 days.Centers for Medicare & Medicaid Services. (2026). 2026 Medicare Parts A & B Premiums and Deductibles. cms.gov. Retrieved Jun 22, 2026, from https://www.cms.gov/newsroom/fact-sheets/2026-medicare-parts-b-premiums-deductibles If a stay runs longer than that, daily coinsurance starts to add up ($434 a day for days 61 through 90 in 2026).Centers for Medicare & Medicaid Services. (2026). 2026 Medicare Parts A & B Premiums and Deductibles. cms.gov. Retrieved Jun 22, 2026, from https://www.cms.gov/newsroom/fact-sheets/2026-medicare-parts-b-premiums-deductibles Most treatment stays don't get anywhere near that, but it's worth knowing the deductible resets with each new benefit period rather than once a year.
What Part B Covers: Outpatient Counseling and Therapy
Most people getting treatment aren't in a hospital bed. They're going to appointments, and that's where Part B does the work. Part B covers outpatient services like individual and group counseling and psychotherapy, including the mental health services you get as part of substance use disorder treatment.Centers for Medicare & Medicaid Services. (n.d.). Opioid Use Disorder treatment services coverage — Medicare.gov. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/opioid-use-disorder-treatment-services
The cost is the standard Part B arrangement. After you meet the Part B deductible ($283 in 2026), you generally pay 20% of the Medicare-approved amount for those outpatient services.Centers for Medicare & Medicaid Services. (n.d.). Opioid Use Disorder treatment services coverage — Medicare.gov. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/opioid-use-disorder-treatment-services,Centers for Medicare & Medicaid Services. (2026). 2026 Medicare Parts A & B Premiums and Deductibles. cms.gov. Retrieved Jun 22, 2026, from https://www.cms.gov/newsroom/fact-sheets/2026-medicare-parts-b-premiums-deductibles So a run of weekly counseling sessions means that 20% coinsurance each visit once the deductible is behind you. If you carry a Medigap policy, it may pick up some of that coinsurance.
Opioid Treatment Programs and the No-Copay Bundle
Opioid use disorder gets its own benefit, and it's a genuinely good one. Part B covers services from a Medicare-enrolled Opioid Treatment Program (OTP), which is a bundled benefit: it wraps the medication (methadone, buprenorphine, or naltrexone) together with the counseling and therapy that go with it.Centers for Medicare & Medicaid Services. (n.d.). Opioid Use Disorder treatment services coverage — Medicare.gov. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/opioid-use-disorder-treatment-services
The cost is the part worth highlighting. When you get these services from an OTP that's enrolled in Medicare and meets the requirements, you won't have to pay any copayments for them.Centers for Medicare & Medicaid Services. (n.d.). Opioid Use Disorder treatment services coverage — Medicare.gov. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/opioid-use-disorder-treatment-services The Part B deductible still applies, so it isn't quite "free" in every sense, but the ongoing copay for the bundled program is zero. That's a meaningful break for treatment that can run for months.
What Part D Covers: The Medications
Some of the medications used in treatment are dispensed through the programs above. Others are prescriptions you fill at a pharmacy, and that's where Part D comes in. Medicare drug coverage (Part D) may cover prescription drugs used to treat substance use disorders, such as buprenorphine and naltrexone, along with the overdose-reversal drugs naloxone and nalmefene.Centers for Medicare & Medicaid Services. (n.d.). Opioid Use Disorder treatment services coverage — Medicare.gov. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/opioid-use-disorder-treatment-services
What you pay depends on your specific plan's formulary and cost-sharing, since Part D plans are run by private insurers. If you're weighing a plan, it's worth checking that the specific medication your doctor recommends is on its drug list.
How Medicare Covers Drug and Alcohol Rehab Costs
Here's the whole picture in one place, so you can see which part of Medicare picks up which piece of treatment.
| Coverage | What it covers | What you pay |
|---|---|---|
| Part A | Treatment after you're admitted to a hospital as an inpatient | Part A inpatient hospital deductible ($1,736 per benefit period in 2026), then day coinsurance on long staysCenters for Medicare & Medicaid Services. (2026). 2026 Medicare Parts A & B Premiums and Deductibles. cms.gov. Retrieved Jun 22, 2026, from https://www.cms.gov/newsroom/fact-sheets/2026-medicare-parts-b-premiums-deductibles |
| Part B | Outpatient counseling, therapy, and psychotherapy | Part B deductible ($283 in 2026), then 20% of the approved amountCenters for Medicare & Medicaid Services. (2026). 2026 Medicare Parts A & B Premiums and Deductibles. cms.gov. Retrieved Jun 22, 2026, from https://www.cms.gov/newsroom/fact-sheets/2026-medicare-parts-b-premiums-deductibles |
| Opioid Treatment Program (Part B) | Bundled medication plus counseling for opioid use disorder | No copayment; the Part B deductible appliesCenters for Medicare & Medicaid Services. (n.d.). Opioid Use Disorder treatment services coverage — Medicare.gov. medicare.gov. Retrieved Jul 17, 2026, from https://www.medicare.gov/coverage/opioid-use-disorder-treatment-services |
| Part D | Prescription medications like buprenorphine and naltrexone | Your plan's cost-sharing |
Frequently Asked Questions
Does Medicare cover inpatient drug and alcohol rehab?
Yes, through Part A, but "inpatient" here means a hospital admission, since Part A is hospital insurance. The one cost detail that trips people up: the Part A inpatient hospital deductible ($1,736 per benefit period in 2026) resets each benefit period, not once a year. A benefit period ends after you've been out of the hospital for 60 days in a row, so a second admission later in the year can mean paying that deductible again.
Does Medicare pay for outpatient counseling and therapy?
Yes, under Part B, and there's no separate "rehab" benefit to sign up for; counseling for substance use runs on the same outpatient mental health track as any other Part B therapy. Unlike the Part A deductible, the Part B deductible ($283 in 2026) is a once-a-year amount; once you've met it, you generally pay 20% of the approved amount per visit, which a Medigap policy can help offset.
How much does an Opioid Treatment Program cost with Medicare?
The ongoing copay is zero, as long as the program is enrolled in Medicare and meets the requirements. The benefit even covers services delivered through an OTP mobile unit, not just a fixed clinic. One caveat on the word "free": the Part B deductible still applies, so you may pay toward that before the no-copay bundle kicks in.
Does Medicare cover methadone, buprenorphine, and naltrexone?
Yes, but the path differs by drug. Methadone for opioid use disorder is dispensed through an Opioid Treatment Program under Part B, not a retail pharmacy. Buprenorphine and naltrexone can come either through the OTP bundle or as a Part D pharmacy prescription (subject to your plan's cost-sharing). Part D can also cover the overdose-reversal drugs naloxone and nalmefene.
I have a Medicare Advantage plan instead. Am I still covered?
Medicare Advantage plans bundle your Part A and Part B benefits, so the same categories of treatment are covered. Your copays and which providers are in network are set by the plan, so check your plan's details for the specifics.
Learn More
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