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Medicare Coverage for Addiction and Mental Health Rehab

Medicare is a federal health plan mostly for people 65 and older, plus some younger people who qualify through long-term disability — generally after 24 months of Social Security Disability Insurance — or conditions like end-stage renal disease or ALS. Most teens and young adults are not on Medicare themselves, but a young person with a qualifying disability can be, and a grandparent or older caregiver raising a teen may carry it. When someone does qualify, Medicare covers inpatient and outpatient substance use and mental health care through Parts A, B, and D. Costs and rules vary, so verify benefits before treatment begins.

Updated: July 13, 2026
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What Medicare Covers for Addiction Treatment

Medicare covers substance use and mental health treatment through its different parts — Part A for inpatient hospital care, Part B for outpatient counseling and therapy, and Part D for prescription drugs. Medicare Advantage (Part C) plans bundle these and may add extra behavioral health benefits. This coverage applies to anyone on Medicare, whether they qualified at 65 or earlier through a long-term disability.

Part A: Inpatient Hospital Care

Medicare Part A helps pay for inpatient substance use and mental health treatment in hospitals, including a young adult's stay when they qualify for Medicare through a disability. Benefits run up to 60 days per benefit period after a deductible, with coinsurance for days 61-90, plus 60 lifetime reserve days. Care in a psychiatric hospital is limited to 190 days over a lifetime.

Part B: Outpatient Care

Medicare Part B covers outpatient substance use and mental health services — individual and group therapy, partial hospitalization, screening and brief counseling, and yearly alcohol misuse counseling. After you meet the Part B deductible, Medicare generally pays 80% of the approved amount, and you or a supplemental plan cover the rest.

Part D: Prescription Drug Coverage

Medicare Part D helps pay for prescription medications a doctor may prescribe as part of treatment. What's covered depends on each Part D plan's formulary, and some drugs may need prior authorization or step therapy first. Check your plan's drug list, or ask the prescriber's office to confirm coverage before you fill a prescription.

How to Verify Your Medicare Benefits

Original Medicare benefits are standardized, but it still pays to verify the details before treatment starts — especially deductibles, networks, and whether the facility takes Medicare.

Verification Steps

  • Confirm which Medicare parts you have (A, B, C, D) and their effective dates
  • Check whether a Medicare Supplement (Medigap) policy is in place
  • Make sure the treatment facility accepts Medicare assignment
  • Review your Part A deductible status before an inpatient stay
  • Look over your Part D plan's drug list for any prescribed medications
  • For Medicare Advantage, confirm the plan's specific behavioral health benefits

Where to Get Help

Call 1-800-MEDICARE (1-800-633-4227) with questions about your coverage, or reach your State Health Insurance Assistance Program (SHIP) for free one-on-one counseling on Medicare benefits. If you would rather talk through treatment options first, SAMHSA's free, confidential National Helpline at 1-800-662-4357 is open 24/7.

Using Medicare to Pay for Rehab

Knowing how Medicare pays for treatment helps a family plan ahead and keep out-of-pocket costs down. Here is how eligibility, providers, and Advantage plans fit together.

Confirm Who Qualifies

Medicare usually starts at age 65, but a younger person can qualify after about 24 months on Social Security Disability Insurance, or sooner with end-stage renal disease or ALS. Someone with both Medicare and Medicaid (dual eligible) may have added behavioral health benefits. Check the Medicare card to confirm which parts — A, B, D — are active.

Find Medicare-Accepting Providers

Not every treatment program accepts Medicare. Use Medicare's provider search at medicare.gov or our treatment center search to find facilities that take it. Look for a program that accepts Medicare assignment — that means it agrees to Medicare's approved amount, which keeps a family's costs lower.

Medicare Advantage Options

If a Medicare Advantage plan is in place, call the plan directly about substance use and mental health benefits. Many Advantage plans add services, lower copays, or care coordination that Original Medicare does not include. The trade-off is that they usually ask you to stay with in-network providers, so confirm the program is in the plan's network first.

Medicare Coverage: Common Questions

Probably not. Medicare is a federal program mainly for people 65 and older. Some younger people qualify too — usually after 24 months on Social Security Disability Insurance, or right away with end-stage renal disease or ALS. A typical teen or young adult is not on Medicare, so most families rely on a parent's private plan or Medicaid instead.

Yes, for people who qualify for Medicare. Part A covers inpatient hospital care, Part B covers outpatient counseling and therapy, and Part D helps with prescription drugs. Medicare Advantage (Part C) bundles these together, sometimes with extra behavioral health benefits. So when a young person with a qualifying disability is on Medicare, their substance use and mental health care is covered.

Yes. A young adult who has received Social Security Disability Insurance for about 24 months generally becomes eligible, and people with end-stage renal disease or ALS can qualify sooner. For those young people, Medicare covers the same inpatient and outpatient substance use and mental health care it covers for older adults. To confirm eligibility, check Medicare.gov or call 1-800-MEDICARE (1-800-633-4227).

Medicare is your own coverage, not your grandchild's, so it usually won't pay for a minor's treatment directly. Their care is typically billed to their own coverage — often Medicaid or a parent's private plan. That said, many programs offer free, confidential benefit checks. Call the center or SAMHSA's National Helpline at 1-800-662-4357 to sort out which coverage applies.

Original Medicare (Parts A and B) offers standardized benefits and lets you use any provider that accepts Medicare. Medicare Advantage (Part C) plans, run by private insurers, bundle Parts A, B, and usually D, and may add behavioral health benefits — but they ask you to use in-network providers. Check the plan directly to see how it covers substance use treatment.

Start with your red-white-and-blue Medicare card to confirm which parts you have (A, B, D), then call 1-800-MEDICARE or visit Medicare.gov. If you're on a Medicare Advantage plan, call the number on that plan's card. The treatment center's admissions staff can also verify your benefits, usually at no cost, before care begins.

Other Plans to Check

Medicaid

Medicaid is a joint federal-state program that helps families with lower incomes pay for a young person's substance use care. Every state covers some addiction treatment, and for enrollees under 21 the EPSDT benefit requires all medically necessary care. Benefits and program names vary by state.

Humana

Humana typically covers substance use treatment for teens and young adults — detox, residential, and outpatient care. Mental health and addiction care is one of the ten essential health benefits the Affordable Care Act requires plans to cover, and the Mental Health Parity and Addiction Equity Act (MHPAEA) keeps those benefits no more restrictive than medical ones. Most young adults are on a commercial or employer Humana plan, or a parent's plan until age 26 — copays and pre-authorization vary, so verify benefits with the facility before admission.

United Healthcare

United Healthcare typically covers substance use treatment for teens and young adults — detox, residential, and outpatient care — as one of the ten essential health benefits the Affordable Care Act requires, with parity protected by the Mental Health Parity and Addiction Equity Act. UHC runs behavioral health through Optum, and most young adults are covered on a commercial or employer plan, or a parent's UHC plan until age 26. Copays and pre-authorization vary, so verify benefits before admission.

Aetna

Aetna, a CVS Health company, typically covers substance use treatment for teens and young adults — detox, residential, and outpatient care — under Mental Health Parity and Addiction Equity Act protections. Young adults often stay on a parent's Aetna plan until age 26, though benefits, copays, and pre-authorization rules vary by plan.