Does Insurance Cover Rehab?

Most insurance plans are required by law to cover addiction treatment. Here's what you need to know about private insurance, Medicaid, Medicare, and your rights under federal law.

Need help now? Call SAMHSA's free, confidential helpline: 1-800-662-4357 (24/7, 365 days a year). They can help you find covered treatment in your area.

Private (Commercial) Insurance

If you have insurance through an employer, a union, or the ACA Marketplace, your plan very likely covers substance use disorder (SUD) treatment. The scope of coverage — which facilities are in-network, how many days are authorized, and your out-of-pocket costs — varies by plan, but federal law sets a floor that every plan must meet.

Typical covered services include medical detoxification, inpatient residential treatment, intensive outpatient programs (IOP), standard outpatient counseling, and medication-assisted treatment (MAT) with FDA-approved medications such as buprenorphine and naltrexone.

Deductible

The amount you pay before insurance kicks in — often $1,000–$5,000 for individual plans.

Co-insurance / Co-pay

Your share of costs after the deductible. Commonly 20–40% of the allowed amount for in-network providers.

Out-of-Pocket Max

The most you'll pay in a plan year. After this, insurance covers 100% of covered services.

The Affordable Care Act (ACA)

The ACA, passed in 2010, classifies substance use disorder treatment as one of the ten Essential Health Benefits (EHBs) that all individual and small-group marketplace plans must cover. This means you cannot be denied a plan because of a history of addiction, and your plan cannot impose annual or lifetime dollar limits on SUD treatment.

The ACA also dramatically expanded Medicaid eligibility in states that chose to participate, opening coverage to millions of low-income adults who previously had no insurance — and therefore no path to covered treatment.

The Mental Health Parity and Addiction Equity Act (MHPAEA)

The Mental Health Parity and Addiction Equity Act, strengthened by the 2023 MHPAEA Final Rule, requires that insurance plans treat mental health and substance use disorder benefits no more restrictively than medical or surgical benefits. In plain terms:

  • ✓Prior authorization requirements for a residential SUD program must be comparable to those for an inpatient medical stay.
  • ✓Limits on the number of covered therapy visits cannot be more restrictive than limits on covered specialist visits.
  • ✓Reimbursement rates for SUD providers must be set using the same methodology as for other providers.
  • ✓Plans must provide an analysis of their parity compliance — you can request this in writing.

If you believe your plan is violating parity, you can file a complaint with your state insurance commissioner or the U.S. Department of Labor.

What to Ask Your Insurance Company

Before entering treatment, call the member services number on the back of your insurance card and ask:

1.

Does my plan cover inpatient residential SUD treatment? What is the in-network benefit?

2.

Is prior authorization required before admission? How long does authorization take?

3.

What is my deductible, co-insurance, and out-of-pocket maximum for behavioral health?

4.

How many inpatient days are authorized initially? What is the process for extensions?

5.

Does my plan cover medication-assisted treatment (MAT) including buprenorphine and naltrexone?

6.

Which SUD facilities are in-network in my area?

7.

If I need out-of-network care, what is the out-of-network benefit?

8.

Is there a case manager who can help coordinate my care?

Always ask for a reference number and the name of the representative you spoke with, and get coverage commitments in writing when possible.

Government Insurance Programs

Medicaid

Medicaid covers addiction treatment for eligible low-income individuals and families. Coverage varies by state. 41 states and D.C. have expanded Medicaid under the ACA, significantly broadening eligibility. 10 states have not yet expanded.

In expansion states, adults earning up to 138% of the federal poverty level qualify — covering many people who previously had no insurance path to treatment.

Medicaid Coverage by State →

Medicare

Medicare covers addiction treatment through Parts A, B, and D. Part A covers inpatient hospital-based detox and psychiatric care. Part B covers outpatient counseling and office-based MAT. Part D covers addiction medications.

If you are 65 or older, disabled, or have end-stage renal disease, Medicare is likely your primary insurance and can cover a significant portion of rehab costs.

Medicare Coverage Details →

What To Do If Your Claim Is Denied

Insurance denials for SUD treatment are common but frequently overturned on appeal. You have the right to appeal any denial:

  1. Request the denial in writing and ask for the specific clinical criteria used.
  2. Have your treatment provider submit a peer-to-peer review request — a doctor-to-doctor conversation.
  3. File a formal internal appeal with your insurer within the deadline stated in the denial letter.
  4. If the internal appeal fails, request an independent external review — insurers are required to comply.
  5. Contact your state insurance commissioner or a patient advocate if the external review also fails.

The information on this page is for educational purposes only and does not constitute legal or financial advice. Insurance coverage varies by plan, state, and individual circumstances. Always verify your specific benefits with your insurance provider before entering treatment.