Does Insurance Cover Rehab?
Most health insurance covers addiction treatment by law. Here's how to actually use it — and what to do if you're denied.
Does insurance cover rehab?
Yes. Under the Affordable Care Act, substance use treatment is an essential health benefit, so marketplace plans and most employer plans are required to cover it. This applies whether the issue is alcohol, opioids, or another substance.
This is true even for plans that don't advertise addiction coverage prominently. It's built into the plan by law, not an optional add-on — so it's worth checking your benefits even if addiction treatment was never mentioned when you signed up.
What's usually covered
Detox, inpatient treatment, outpatient care, intensive outpatient (IOP) and partial hospitalization (PHP) programs, and medication-assisted treatment are typically included.
Your specific plan sets the provider network, copays, deductibles, and any prior-authorization steps required before treatment starts. Two people on the same insurance company but different plans can have very different real-world coverage.
Why insurers deny claims
Common reasons include the insurer determining a level of care isn't “medically necessary” by their internal criteria, using an out-of-network provider, missing prior authorization, or gaps in clinical documentation from the treatment center. None of these mean the denial is correct or final.
If you get denied
Denials happen and are often reversible. You have the right to appeal, and federal mental-health parity law requires insurers to treat substance use and mental health benefits comparably to medical and surgical benefits — that law is genuinely on your side.
Don't take the first no as the end of the conversation. Many centers have staff who handle insurance appeals regularly and can help build the case, since they see the same denial reasons repeatedly.
If insurance still isn't enough
If your plan doesn't cover everything, or you have no plan at all, sliding-scale clinics, state-funded beds, nonprofit centers, and center payment plans can cover the gap. Nobody with a genuine need should be turned away for lack of full coverage — see the free rehab and no-insurance guides for next steps.
In-network vs. out-of-network
Staying in-network almost always means a lower deductible, lower coinsurance, and a simpler claims process. Out-of-network care is often still covered, just at a reduced rate and higher cost to you — so before ruling a center out on price, ask what your plan's out-of-network benefit actually looks like rather than assuming it's zero.
Some centers will negotiate a single-case agreement with an out-of-network insurer, effectively treating the claim as in-network for that one admission. It's not guaranteed, but it's worth asking about if a center you want isn't in your network.
Check your specific plan
Call the number on the back of your insurance card, or ask a treatment center to verify your benefits for you — most will do this for free before you commit to anything. Then compare in-network options in the directory below.
Highest-rated centers in our directory
Sorted by public review rating across all 5 metro areas we currently cover — not filtered to this page's topic yet.
Facility data from SAMHSA's treatment locator. Ratings, where shown, are the public Google score. No sponsored listings.
People also ask
Common reasons are a “not medically necessary” determination under the insurer's own criteria, use of an out-of-network provider, missing prior authorization, or incomplete clinical documentation. A denial isn't automatically correct — it can usually be appealed.
Check Medicaid eligibility first, then look at state-funded beds, sliding-scale clinics, and center payment plans or scholarships. Most people without insurance end up combining a couple of these rather than paying full price out of pocket.
You still have real paths: state-funded programs, sliding-scale clinics, nonprofits, and hotlines like the SAMHSA National Helpline (1-800-662-4357) all exist for people who can't pay out of pocket. Inability to pay isn't a dead end.
Medicare doesn't cover addiction treatment at a flat 100 days and 100%. That figure usually refers to skilled nursing facility coverage after a hospital stay, which is different from inpatient substance-use treatment coverage under Part A. See our Medicare rehab coverage guide for the details that actually apply.