Insurance coverage for substance use disorder and medical detox

Most private health insurance plans, including ACA Marketplace plans, Medicaid, and Medicare, provide coverage for substance use disorder treatment. Under the Mental Health Parity and Addiction Equity Act (MHPAEA), insurance plans are legally required to ensure that financial requirements and treatment limitations for mental health and substance use benefits are no more restrictive than those applied to medical and surgical benefits.

While coverage is generally protected, it is not automatic. Insurers often treat medical detox and withdrawal management as distinct services with specific authorization requirements and medical necessity criteria. Coverage depth varies based on the specific plan type, the facility’s network status, and whether a licensed clinician deems the treatment medically necessary. Even with parity laws in place, plans may deny specific admissions if clinical criteria are not met or if the provider is out-of-network.