How Insurance Works for Addiction Treatment
Health-plan coverage for addiction treatment varies by plan, service, network, and medical-necessity rules. This guide explains common coverage terms and the questions to ask your insurer and a facility before admission.
Find Rehab by Insurance Provider
Browse centers that report accepting major insurance carriers. Acceptance does not guarantee that a facility is in-network for your exact plan, so always verify benefits before admission.
Rehabs accepting Aetna
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Rehabs accepting Anthem Blue Cross Blue Shield
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Rehabs accepting Cigna
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Rehabs accepting UnitedHealthcare
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Rehabs accepting Humana
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Rehabs accepting Kaiser Permanente
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Rehabs accepting Optum
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Rehabs accepting TRICARE
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Rehabs accepting Medicare
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Rehabs accepting Medicaid
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Rehabs accepting MultiPlan
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Rehabs accepting GEHA
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Rehabs accepting ComPsych
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Rehabs accepting Out of Network / Self-Pay
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Coverage by Level of Care
Treatment may be delivered at different levels of care, from medically managed withdrawal services to outpatient counseling. Coverage rules differ by plan, so confirm whether a specific service, provider, and level of care are covered before admission.
Medical Detox
Short-term medically supervised withdrawal care
Coverage depends on the plan, setting, network status, medical-necessity criteria, and authorization rules. Ask whether withdrawal management is covered under inpatient, hospital, residential, or another benefit category for your specific plan.
Residential / Inpatient Rehab
Live-in treatment; duration varies by clinical need and program
Residential coverage varies by plan and may require prior authorization, medical-necessity review, network participation, or ongoing review. Ask whether room and board are included and whether your plan distinguishes residential treatment from inpatient hospital care.
Partial Hospitalization (PHP)
Structured daytime treatment; schedule varies by program
PHP coverage depends on the plan's behavioral-health benefits, network, authorization requirements, and medical-necessity criteria. Ask the insurer how PHP or day treatment is classified under your specific plan.
Intensive Outpatient (IOP)
Multiple structured outpatient sessions each week
IOP benefits vary by plan. Confirm whether the program is in-network, whether authorization is required, what visit or service limits apply, and whether virtual IOP is covered separately from in-person care.
Standard Outpatient & Counseling
Recurring outpatient visits; frequency varies
Outpatient coverage can include copays, coinsurance, deductibles, network requirements, or authorization depending on the plan and service. Confirm coverage for individual, group, family, medication, and other services separately when relevant.
Medications for Opioid or Alcohol Use Disorder (often called MAT)
Ongoing treatment; duration is individualized
Coverage for medications used to treat opioid or alcohol use disorders and related clinical services varies by plan, pharmacy benefit, provider type, and medication. Ask about formulary status, prior authorization, network requirements, and any separate clinical or pharmacy charges.
Telehealth & Virtual Programs
Remote care where clinically and legally appropriate
Telehealth coverage varies by plan, provider, state, and service. Confirm whether virtual treatment is covered, whether the provider must be licensed in your state, and whether cost sharing differs from in-person care.
What You'll Actually Pay: Key Terms
Your total cost depends on plan rules, provider network status, covered services, and cost sharing. Ask your insurer for these numbers. A facility may help verify benefits, but confirm important coverage details with the insurer directly.
Deductible
The amount you may need to pay for covered services before the plan begins paying according to its cost-sharing rules. Some services can be covered before the deductible is met, so check how your specific plan applies the deductible to behavioral-health care.
Copay & Coinsurance
A copay is a fixed amount for a covered service; coinsurance is a percentage of the allowed amount. Federal parity rules can apply to financial requirements for mental health and substance-use benefits, but the comparison depends on the plan and benefit classification.
Out-of-Pocket Maximum
For plans subject to an out-of-pocket maximum, this is the annual limit on certain covered in-network cost sharing. What counts toward the limit and what happens after it is reached depends on the plan, so check your Summary of Benefits and Coverage.
In-Network vs Out-of-Network
In-network providers generally have contracted rates. Out-of-network benefits may be limited, unavailable, or subject to higher cost sharing. Emergency and surprise-billing protections have specific rules and should not be assumed to apply to planned treatment admissions.
Pre-Authorization
Some plans require approval before certain services or levels of care. Ask the insurer and facility who submits the request, what documentation is needed, and whether authorization guarantees payment or remains subject to other plan terms.
Medical Necessity
Plans may apply medical-necessity criteria when deciding whether a service is covered. The criteria and review process vary by insurer, plan, jurisdiction, and service, so ask which standards apply to your request.
Coverage by Insurance Type
Employer & Marketplace Plans
Marketplace plans generally include mental health and substance-use disorder services within the essential-health-benefit framework, but the covered services, networks, authorization rules, and cost sharing vary by plan. Employer-plan requirements depend on the plan and applicable law; federal parity protections may apply when mental health or substance-use benefits are offered.
Medicaid
Medicaid eligibility and substance-use treatment benefits vary by state. Coverage, provider participation, authorization rules, and residential or other service limits can differ substantially, so check your state's Medicaid program and managed-care plan.
Medicare
Medicare can cover eligible inpatient hospital and outpatient substance use treatment services, and coverage for medications depends on the service and drug benefit involved. Ask Medicare or the provider to confirm coverage for a specific residential program or level of care.
TRICARE & VA
TRICARE and VA benefits are separate programs with their own eligibility, network, authorization, and referral rules. Confirm coverage directly with TRICARE or VA and the provider. See our Veterans guide for additional questions to ask.
Verifying Your Benefits: Step by Step
- 1Call the member services number on the back of your insurance card and ask whether substance use treatment is covered, and at which levels of care.
- 2Ask for your deductible, coinsurance, copay, and out-of-pocket maximum in plain numbers.
- 3Ask whether a facility is in-network for your exact plan and request a written estimate when available. A benefits check does not guarantee payment.
- 4If pre-authorization is required, ask whether the facility, clinician, or you must submit it, and keep any approval or reference information you receive.
- 5Keep the approval letters and any explanation-of-benefit (EOB) statements in case a claim is disputed later.
Questions to Ask Every Facility
- Is my insurance in-network with your facility, and at which levels of care?
- What will my estimated out-of-pocket cost be — deductible, copays, and coinsurance included?
- If pre-authorization is required, who submits it, what information is needed, and what are my options if it is denied?
- What happens to my coverage if I need to step down to a lower level of care mid-treatment?
- Are room and board billed separately from clinical services, and is that covered?
- Do you offer a payment plan or financial assistance for whatever insurance doesn't cover?
If coverage is denied
A denial may have appeal or external-review options depending on your plan and the reason for the decision. Ask the insurer for the denial notice and appeal instructions. If you believe mental health or substance-use benefits are being limited more restrictively than comparable medical/surgical benefits, federal or state parity protections may be relevant.
Editorial review: Reviewed September 7, 2026. Insurance rules and plan benefits change; verify your current plan documents and benefits directly.
Primary source: CMS — Mental Health Parity and Addiction Equity Act. See our Editorial Standards.
This guide is general information, not insurance, legal, or medical advice. Coverage varies by plan, state, and facility — always confirm your specific benefits with your insurer and the facility before admission.