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Mental Health Billing Codes: A Practical Guide for Providers

September 8, 2026 · 3 min read

Understanding Mental Health Billing Codes

Mental health billing uses a range of CPT and HCPCS codes depending on the service provided.

The correct code should reflect the service actually performed and meet applicable payer requirements.

CMS's Medicare mental-health resources identify many commonly used psychiatric and psychotherapy codes.

Common Mental Health CPT Codes

CPT General description ———————————– ——————————————————— 90791 Psychiatric diagnostic evaluation

90792 Psychiatric diagnostic evaluation with medical services

90832 Psychotherapy, 30 minutes

90834 Psychotherapy, 45 minutes

90837 Psychotherapy, 60 minutes

90833 Psychotherapy with E/M, 30 minutes

90836 Psychotherapy with E/M, 45 minutes

90838 Psychotherapy with E/M, 60 minutes

90839 Psychotherapy for crisis, first 60 minutes

90840 Additional 30 minutes of crisis psychotherapy

90846 Family psychotherapy without patient

90847 Family psychotherapy with patient

90853 Group psychotherapy

96127 Brief emotional/behavioral assessment

CMS's current Medicare materials provide corresponding descriptions for these codes, with payer-specific requirements applying to actual claim submission.

Don't Choose a Code Based Only on Appointment Length

One of the most important billing principles is:

The scheduled appointment length isn't necessarily the same as the billable service.

The code must be supported by the service performed, documentation and applicable payer requirements.

Documentation Matters

For time-based psychotherapy services, documentation should support the applicable time requirements.

CMS guidance currently states that start/stop times or total times should be documented for 90832, 90834 and 90837.

Payer Rules Matter

A code may be valid CPT coding but still encounter payment problems because of:

  • Payer policy
  • Provider eligibility
  • Authorization
  • Diagnosis
  • Frequency
  • POS
  • Modifier
  • Documentation
  • Coverage

That's why a billing company should not simply look at the CPT code.

It should look at the entire claim.

The Mental Health Medical Billers Approach

Our role is to help practices manage the complete billing workflow around their services.

That can include:

Eligibility

→ Claims

→ Denials

→ Payment Posting

→ A/R

→ Credentialing

→ Reporting

The goal is to help providers spend less time dealing with billing administration and more time running their practices.

[Get a Free Billing Assessment]

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