Does Insurance Cover Drug and Alcohol Rehab?

On this page

• What insurance usually covers
• Rules your plan has to follow
• Where plans limit coverage
• Medicare and rehab
• Medicaid and rehab
• If you don’t have insurance
• Choosing a program and avoiding scams
• Frequently asked questions

What insurance usually covers

Treatment comes in levels, and clinicians often use criteria from the American Society of Addiction Medicine to match you to the right one:

• Detox: medically supervised withdrawal, in a hospital or a treatment center
• Inpatient or residential treatment: you live at the program for a period of time
• Partial hospitalization: a structured program most of the day, while you sleep at home
• Intensive outpatient: several sessions a week, at least 9 hours a week in Medicare’s definition
• Outpatient counseling: individual or group therapy (see does health insurance cover therapy)
• Medications: buprenorphine, methadone and naltrexone for opioid use disorder, and medications for alcohol use disorder

Your plan pays its share after your deductible, copays and coinsurance, up to your out-of-pocket maximum. A residential stay can hit that maximum quickly, so check it before you go.

Rules your plan has to follow

Essential health benefits. All Marketplace plans must cover mental health and substance use disorder services. They can’t set yearly or lifetime dollar limits on that care, and they can’t turn you down or charge more because of a past or current addiction. See getting health insurance with pre-existing conditions.

Parity. The Mental Health Parity and Addiction Equity Act says copays, visit limits and rules like prior authorization for addiction care can’t be more restrictive than for medical care. It applies to employer plans with more than 50 workers, individual plans, Medicaid managed care and CHIP. It doesn’t require a plan to cover addiction care in the first place, but the ACA does for individual and small-group plans.

A 2024 rule added requirements for plans to measure whether their rules block access to care. In May 2025, federal agencies said they wouldn’t enforce the new parts while a lawsuit plays out. The older parity rules still apply.

Your right to know why. Plans have to give you their medical necessity criteria for addiction care if you ask, and a written reason for any denial. You can appeal, and then ask for an independent external review. See how to appeal a health insurance claim denial.

Where plans limit coverage

• Prior authorization. Most plans want approval before a residential stay or intensive program. See what is prior authorization.
• Length of stay. A plan may approve a certain number of days and review your progress. If it decides residential care is no longer medically necessary, it may only cover a lower level of care. You can appeal that decision.
• Networks. Out-of-network rehab can cost you most or all of the bill, especially in an HMO or EPO. See what to do about out-of-network costs.
• Short-term plans. These aren’t ACA plans and often exclude addiction treatment. See short-term health insurance.

Medicare and rehab

• Part A covers inpatient care in a general or psychiatric hospital. Stays in a psychiatric hospital are limited to 190 days in your lifetime. In 2026, the Part A deductible is $1,736 per benefit period.
• Part B covers outpatient counseling, partial hospitalization and intensive outpatient programs, usually at 20% after the Part B deductible. Marriage and family therapists and mental health counselors can bill Medicare.
• Opioid treatment programs are covered under Part B, including medications, counseling and check-ins. At a Medicare-enrolled program, you pay no copays, though the Part B deductible applies.

Medicaid and rehab

Medicaid is a major payer for addiction treatment and covers about one in five adults with a substance use disorder. Federal law has long barred Medicaid from paying for adults in larger mental health and addiction facilities, but 38 states have approved waivers that allow it for residential addiction treatment. Medicaid looks at your current monthly income, and you can apply any time. See health insurance for low-income families.

If you don’t have insurance

• Call the SAMHSA National Helpline at 1-800-662-HELP (4357). It’s free, confidential and open 24/7 in English and Spanish.
• Search FindTreatment.gov for state-licensed programs, including ones with sliding-fee scales based on income.
• Apply for Medicaid, which may cover treatment starting right away if you qualify.
• See how to get mental health help without insurance.

If you or someone you know is in crisis, call or text 988.

Choosing a program and avoiding scams

Some businesses buy search ads using the names of real treatment centers, then send callers to their own call centers. The Federal Trade Commission warned about this in July 2026. To protect yourself:

• Scroll past paid search results, and type the program’s web address yourself.
• Call your insurer, not the rehab, to confirm the program is in network and what you’ll pay.
• Check that the program is licensed in its state.
• Be wary of anyone offering free travel or other perks to get you to a program far from home.

Need a plan that covers mental health and addiction care? Compare plans in your area.

Frequently asked questions

Does insurance cover inpatient rehab?

Usually, when it’s medically necessary. Most plans require prior approval and cover the most at in-network programs.

How long will insurance pay for rehab?

There’s no set number of days. Plans approve care based on medical necessity and review your progress. If a plan cuts your stay short, you can appeal.

Does Medicare cover alcohol rehab?

Yes. Part A covers inpatient care, and Part B covers outpatient counseling, intensive outpatient programs and partial hospitalization.

Can I be denied health insurance because of addiction?

Not for ACA plans. Marketplace and job-based plans can’t turn you down or charge you more because of a substance use disorder.

This article is general information, not medical or legal advice. If you or someone you know is in crisis, call or text 988. Last reviewed September 2026.