CMS Prior Authorization Changes for Mental Health: 2026 Provider Guide

What Changed in 2026 for Mental Health Prior Authorization?

Starting January 1, 2026, CMS implemented significant prior authorization requirements for outpatient mental health services under Medicare. These changes affect how mental health providers bill for extended therapy sessions and create new administrative requirements for practices serving Medicare beneficiaries.

Key Change: Prior authorization now required for:
• Psychotherapy sessions beyond 12 visits/year (CPT 90834, 90837)
• Certain E/M services when billed with psychotherapy
• Crisis intervention services in some circumstances

Understanding the 12-Visit Threshold

Medicare now requires prior authorization after the 12th psychotherapy visit per calendar year. This applies to individual psychotherapy codes:

• CPT 90834 (45-minute psychotherapy)
• CPT 90837 (60-minute psychotherapy)
• CPT 90847 (family psychotherapy with patient)

Tracking Strategy: Implement visit counting at intake and alert staff at visit #10 to begin PA process (2-visit buffer).

Which CPT Codes Require Prior Auth?

Prior Authorization Submission Process

Step-by-Step:

1. Identify Need: Track visits; flag at visit #10
2. Document Medical Necessity: Include diagnosis, treatment goals, progress, plan
3. Submit Through MAC Portal: Each Medicare Administrative Contractor has process
4. Track Status: Most decisions within 14 calendar days
5. Update Records: Add authorization number to claim

Documentation Requirements

PA submissions must include:

• Patient demographics and Medicare number
• Primary and secondary diagnoses (ICD-10)
• Current treatment plan with measurable goals
• Progress notes showing improvement/maintenance
• Clinical justification for continued frequency
• Expected duration of continued treatment

Common Denial Reasons & How to Avoid

Timeline & Compliance Calendar

Need Help Navigating 2026 PA Requirements?

We help practices implement visit tracking, create compliant documentation, and manage prior authorizations efficiently. Request a free PA compliance audit to review your workflow and identify improvement opportunities.