Medicare pays for addiction treatment — inpatient detox, outpatient counseling, IOP/PHP, and medication-assisted treatment — across Parts A, B, C, and D. Here's exactly what's covered, what isn't, and how coverage works after a hospital stay.
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Section 1
Yes — Medicare covers drug and alcohol rehab, but coverage depends on the level of care. Medicare pays well for inpatient hospital detox, inpatient psychiatric treatment, outpatient counseling, intensive outpatient programs, and medication-assisted treatment (MAT). It is more limited for extended residential (non-hospital) rehab stays than Medicaid or private insurance tend to be. Coverage is split across four parts — Part A (hospital), Part B (outpatient/medical), Part C (Medicare Advantage), and Part D (prescription drugs) — and what you owe depends on which part is paying.
Roughly 1 in 6 Medicare beneficiaries has a substance use or mental health condition, and Medicare's coverage of addiction treatment has expanded significantly in recent years — most notably, Medicare added coverage for opioid treatment programs (methadone clinics) in 2020. Still, Medicare was designed primarily as a medical insurance program for older and disabled Americans, not as a substance-use treatment benefit, so its rules differ from Medicaid in important ways — especially around residential care and lifetime day limits.
The rest of this guide walks through exactly what each part of Medicare covers, what a hospital stay means for follow-up addiction treatment, and where Medicare's coverage gaps are — so you can plan care and costs accurately.
Section 2
Medicare isn't one plan — it's four parts, each covering a different slice of addiction treatment. Understanding which part pays for which service is the key to understanding your actual coverage.
| Service | Which Part Pays | Typical Cost-Sharing | Prior Auth Under Original Medicare? |
|---|---|---|---|
| Inpatient hospital detox | Part A | Deductible + coinsurance after day 60 | No |
| Inpatient psychiatric care (SUD/co-occurring) | Part A | Same as above; 190-day lifetime cap | No |
| Outpatient counseling | Part B | 20% coinsurance | No |
| IOP / PHP | Part B | 20% coinsurance | No |
| Methadone (OTP) | Part B | $0 coinsurance | No |
| Buprenorphine / naltrexone (in-office) | Part B | 20% coinsurance | No |
| Take-home Suboxone / naltrexone pills | Part D | Plan copay tier | Varies by plan |
| Residential (non-hospital) SUD treatment | Limited / case-by-case | Varies | Usually N/A under Original Medicare |
| Sober living | Not covered | Full cost out-of-pocket | N/A |
Section 3
This is one of the most common — and most confused — Medicare questions, because "rehab after a hospital stay" can mean two very different things: a Skilled Nursing Facility (SNF) stay for physical/medical recovery, or ongoing addiction treatment after a detox or psychiatric hospitalization. Medicare treats these very differently.
When you're admitted to a hospital as an inpatient — including for medical detox or inpatient psychiatric/SUD treatment — Medicare Part A covers the stay under a "benefit period." You pay a one-time deductible per benefit period (roughly $1,700, an approximate 2026 figure), and Part A covers days 1–60 in full after that. From day 61–90, you owe a daily coinsurance (roughly $425–$450/day, approximate), and if you use "lifetime reserve days" (91–150, a one-time 60-day pool you can draw from once in your life), the daily coinsurance roughly doubles (approximately $850–$900/day). These figures are ballpark and adjust annually — confirm current amounts at medicare.gov before relying on them for financial planning.
If you're formally admitted as a hospital inpatient for 3 or more consecutive days (not counting the discharge day, and not counting time spent under "observation status," which doesn't count toward this rule), you become eligible for a Medicare-covered Skilled Nursing Facility (SNF) stay afterward — as long as a doctor certifies you need daily skilled nursing or rehabilitation therapy related to the condition that was treated in the hospital.
When SNF coverage does apply (for its intended medical/rehabilitative purpose), Medicare Part A covers days 1–20 in full, and days 21–100 require a daily coinsurance (roughly $215–$220/day, approximate 2026 figure). After 100 days in a benefit period, Medicare SNF coverage ends.
For most people hospitalized for detox, an overdose, or a psychiatric crisis related to substance use, the realistic path to "rehab after the hospital stay" is not a SNF — it's discharge planning into outpatient-level SUD care. Federal rules require hospitals to provide discharge planning, and hospital social workers or case managers are typically the ones who arrange what happens next. Before you leave the hospital, a good discharge plan should include:
In short: Medicare does cover care after a hospital stay, but the "rehab" it funds after discharge is almost always Part B outpatient/IOP/PHP treatment arranged through hospital discharge planning — not an extended residential stay billed as a SNF benefit. If you or a family member are being discharged soon, ask to speak with the hospital social worker specifically about SUD aftercare before you leave.
Section 4
Medicare's addiction-treatment coverage has real limits — knowing them ahead of time prevents surprise bills or unmet expectations at admission or discharge.
Section 5
All Medicare Advantage (Part C) plans are required by law to cover at least what Original Medicare (Parts A and B) covers. The real differences are in networks, prior authorization, and extra benefits.
You can use any Medicare-certified facility or provider nationwide that accepts Medicare — no referrals, no network, and prior authorization is rarely required for standard SUD services. This flexibility matters most if you travel, split time between states, or want to choose a specialized out-of-area facility.
Private insurers administer these plans and must cover at least Original Medicare's benefits — many add extra behavioral health services, transportation to appointments, or lower copays. In exchange, most plans require you to use an in-network provider and get prior authorization before starting IOP, PHP, or an inpatient stay. Check your plan's Evidence of Coverage for its specific SUD benefit and network.
Section 6
Not every facility accepts Medicare, and Medicare Advantage networks vary further still. Here's how to find one — and confirm coverage before you commit.
Browse rehab centers that accept Medicare in some of the largest states below — always confirm facility-level Medicare acceptance directly, since coverage and network participation can vary by specific plan:
Section 7
Common questions about using Medicare for drug and alcohol treatment.
Sometimes, but not always in the way people expect. If you were an inpatient for 3 or more consecutive days, you may qualify for a Medicare-covered Skilled Nursing Facility (SNF) stay afterward — but a SNF provides skilled nursing and rehabilitation therapy, not residential addiction treatment, and typically does not fund a stay at a residential rehab facility.
For most people discharged after detox or a psychiatric hospitalization, the realistic path to continued addiction care is outpatient treatment — IOP, PHP, or standard outpatient counseling — covered under Part B and arranged through the hospital's discharge planning team. Ask the hospital social worker or case manager to set up a specific outpatient appointment before you leave.
Part A covers inpatient hospital care, including medically supervised detox and inpatient psychiatric hospital treatment. You pay a deductible per benefit period (roughly $1,700, an approximate 2026 figure) and Part A covers days 1–60 in full. Days 61–90 require daily coinsurance (roughly $425–$450/day, approximate), and lifetime reserve days (91–150) roughly double that rate.
A key Medicare-specific rule: inpatient psychiatric hospital care is capped at 190 days over your entire lifetime. This limit does not apply to general medical/surgical hospital admissions, including standard inpatient detox in a non-psychiatric unit.
Part B covers outpatient substance use disorder services: individual and group counseling, intensive outpatient programs (IOP), partial hospitalization programs (PHP), and medication-assisted treatment. This includes methadone administered at a certified Opioid Treatment Program — covered under Part B since 2020 — plus office-based buprenorphine and naltrexone (Vivitrol) injections.
You typically owe 20% coinsurance after meeting the annual Part B deductible, though some preventive SUD screening and brief counseling services have no cost-sharing at all.
Yes, across multiple parts. Buprenorphine induction and management delivered by a provider, and naltrexone (Vivitrol) injections, are covered under Part B. Take-home prescriptions — like Suboxone film or tablets you pick up at a pharmacy — are typically covered under your Part D prescription drug plan, or the built-in drug benefit if you're on a Medicare Advantage plan.
Methadone for opioid use disorder is covered under Part B when dispensed at a Medicare-certified Opioid Treatment Program, bundled into a weekly payment that also covers required counseling.
Medicare Advantage (Part C) plans are required by law to cover at least everything Original Medicare covers, and many add extra behavioral health benefits, lower copays, or added services like transportation. The tradeoff is that Medicare Advantage plans typically use a provider network and often require prior authorization before you can start IOP, PHP, or an inpatient stay.
Original Medicare has no network restrictions — you can use any Medicare-certified facility nationwide, and prior authorization is rarely required for standard SUD services. Which is better for you depends on whether you value flexibility (Original Medicare) or added benefits within a network (Medicare Advantage).
Medicare does not cover non-medical sober living homes, inpatient psychiatric care beyond the 190-day lifetime limit, or care at facilities that aren't Medicare-certified. Coverage of extended residential (non-hospital) substance use treatment under Original Medicare is also more limited than under Medicaid or private insurance — Medicare's strongest coverage areas are outpatient/IOP/PHP treatment and hospital-based inpatient detox or psychiatric care, not months-long residential stays.
Some Medicare Advantage plans add residential treatment benefits beyond what Original Medicare covers — check your specific plan's Evidence of Coverage document if this matters to your care plan.
Many people are "dual-eligible" — qualifying for both Medicare (based on age or disability) and Medicaid (based on low income). If you're dual-eligible, Medicaid can often cover services and cost-sharing that Medicare doesn't fully pay for, including some residential addiction treatment stays that Original Medicare covers only in a limited way.
See our Medicaid coverage guide for details on Medicaid's addiction treatment benefits, and contact your state Medicaid office to check dual-eligibility rules where you live.
Have a question not answered here? See our Drug Rehab FAQ for more common questions about treatment, insurance, and what to expect.
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This page is part of the RehabCentersGuide Insurance section — coverage guides for every major payer. Many people qualify for both Medicare and Medicaid.