How to appeal an insurance denial for rehab

Insurance denials for addiction treatment are common but frequently overturned on appeal. Understanding the process improves your chances significantly.

Step 1: Understand the denial

Read the denial letter carefully. Identify the specific reason for denial (medical necessity, out-of-network, prior authorization, etc.). Note the appeal deadline (typically 30-180 days).

Step 2: Internal appeal

Write an appeal letter addressing the specific denial reason. Include supporting clinical documentation from your treatment provider. Reference ASAM criteria supporting the requested level of care. Cite the Mental Health Parity Act if applicable. Request a peer-to-peer review (your doctor speaks with the insurance company's doctor).

Step 3: External review

If internal appeal is denied, you have the right to an independent external review. An external reviewer not employed by the insurance company evaluates the case. External review decisions are binding on the insurance company.

Winning strategies

The treatment facility's utilization review team should help with appeals. Clinical documentation is everything: specific symptoms, functional impairment, failed lower-level treatment. Reference ASAM criteria matching the patient to the level of care. Mental Health Parity violations are increasingly successful appeal arguments.

Authoritative sources

This article references guidelines from: SAMHSA · NIDA · ASAM

Frequently asked questions

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