Insurance & cost

Does Aetna cover rehab? Complete coverage guide

Published December 10, 2025 · 6 min read · Updated April 2026

Reviewed for accuracy by licensed clinical professionals.

Aetna covers substance abuse treatment under mental health parity requirements. Aetna has one of the larger behavioral health networks.

Covered services

Medical detox. Residential treatment (prior authorization required). PHP and IOP. Outpatient therapy. MAT medications. Psychiatric evaluations and medication management.

Aetna specifics

Aetna uses clinical criteria (ASAM criteria) to determine appropriate level of care. Prior authorization is required for residential and PHP. Continued stay reviews occur during treatment. Aetna's behavioral health number is on the back of your card.

Getting approved

Call Aetna before admission. Provide clinical information supporting the requested level of care. The treatment facility typically handles authorization. If denied, appeal immediately with additional clinical documentation.

Authoritative sources

This article references guidelines from: SAMHSA · NIDA · ASAM

Frequently asked questions

Does Aetna pay for rehab?

Yes. Aetna covers substance abuse treatment including all levels of care under mental health parity.

Does Aetna require prior authorization?

Yes for residential and PHP. Outpatient and IOP may not require prior auth depending on your plan.

How do I appeal an Aetna denial?

Request a peer-to-peer review first. If denied again, file a formal appeal with additional clinical documentation. Many denials are overturned.

Disclaimer: Informational only. Not medical advice. SAMHSA: 1-800-662-4357.