Does Insurance Cover Rehab? What's Covered and What Isn't

Most health insurance covers addiction treatment. Learn what federal parity law requires, which plans cover rehab, what you might still pay, and how to verify your benefits for a Delaware program.

June 10, 2026
AR

Angela Robinson

Does Insurance Cover Rehab? What's Covered and What Isn't

Yes — most health insurance covers addiction treatment. Under federal law, health plans that include behavioral health benefits must cover substance use treatment comparably to medical and surgical care. What you actually pay depends on your specific plan, the level of care, whether the provider is in-network, and your deductible.1

Key takeaways

  • Federal parity law requires comparable coverage for addiction treatment.
  • Medicaid, Medicare, marketplace, and most employer plans cover rehab.
  • Coverage is based on medical necessity and your plan's network.
  • You may still owe deductibles, copays, or coinsurance.

Does insurance have to cover rehab?

In most cases, yes. The Mental Health Parity and Addiction Equity Act requires that plans offering behavioral health benefits cover substance use disorder treatment no more restrictively than other medical care.1 The Affordable Care Act also makes substance use treatment an essential health benefit on marketplace plans.

What types of insurance cover rehab?

Coverage exists across nearly every type of plan, though the details differ:

Insurance typeWhat it typically covers
Employer / private (Aetna, Cigna, UnitedHealthcare)Detox, inpatient, outpatient, and MAT, subject to network and prior authorization
Marketplace / ACA plansSubstance use treatment as an essential health benefit
Medicaid (Delaware)A broad range of addiction services for eligible residents
MedicareInpatient and outpatient treatment for older adults and some disabilities
Military / VATreatment through TRICARE and Veterans Affairs programs

What parts of rehab are covered?

Insurance generally covers each medically necessary level of care along the treatment continuum — from detox through outpatient.2 That usually includes medical detox, residential treatment, partial hospitalization, intensive outpatient, standard outpatient, and medication-assisted treatment.

What might you still pay?

Coverage rarely means zero cost. Depending on your plan, you may owe a deductible before coverage begins, copays or coinsurance for each service, and higher costs if you choose an out-of-network provider. Some levels of care also require prior authorization.

How do you check your rehab coverage?

The fastest way is to have the treatment center verify your benefits — most do this for free. You can also call the member number on your insurance card and ask about coverage for substance use treatment, in-network providers, and prior authorization.

To see programs that work with your plan, explore Delaware centers that accept Aetna, Medicare, and other major insurers, or browse all Delaware treatment centers.

Paying for rehab in Delaware

If you are uninsured or underinsured, Delaware Medicaid covers addiction treatment for eligible residents, and many programs offer sliding-scale fees or payment plans.

For free, confidential help understanding your options, call the SAMHSA National Helpline at 1-800-662-4357.3 If you or someone you love is in crisis, call or text 988.

Frequently asked questions

Sources

  1. CMS. The Mental Health Parity and Addiction Equity Act (MHPAEA). Centers for Medicare & Medicaid Services.
  2. ASAM. The ASAM Criteria, 4th Edition. American Society of Addiction Medicine, 2023.
  3. SAMHSA. National Helpline: 1-800-662-HELP (4357). Substance Abuse and Mental Health Services Administration.