Behavioral Health Billing: Time-Based Coding and Telehealth Rules

Behavioral health billing carries a unique complication most other specialties don't deal with as heavily: many core CPT codes are time-based, meaning the code billed has to match documented session length.

Key CPT Codes and Their Time Requirements

• 90832 — 30 minutes (16–37 min)
• 90834 — 45 minutes (38–52 min)
• 90837 — 60 minutes (53+ min)
• 90853 — group psychotherapy

Telehealth Billing Updates

Requirements vary by payer and state — place-of-service codes, required modifiers like -95, and which codes are covered via telehealth should be confirmed per payer.

Common Denial Reasons in Mental Health Billing

• Session duration not clearly documented
• Missing or expired authorization beyond approved session count
• Telehealth modifier or place-of-service mismatches
• Diagnosis that doesn't support session frequency