---
title: "CPT 90791: Psychiatric diagnostic evaluation | BillingBrief"
description: "An initial psychiatric diagnostic evaluation without medical services. It's commonly used by therapists, psychologists, and clinical social workers for an…"
canonical: "https://billingbrief.com/cpt/90791/"
language: "en"
---

# 90791 Psychiatric diagnostic evaluation

CPT · [BillingBrief summary](#source)

An initial psychiatric diagnostic evaluation without medical services. It's commonly used by therapists, psychologists, and clinical social workers for an intake.

## What to know

-   Prescribers who also do medical services (like medication review) use 90792 instead.
-   Not time-based.

## Related codes

-   [`90792` Psychiatric diagnostic evaluation with medical services CPT](https://billingbrief.com/cpt/90792/)
-   [`90834` Psychotherapy, about 45 minutes CPT](https://billingbrief.com/cpt/90834/)
-   [`90837` Psychotherapy, about 60 minutes CPT](https://billingbrief.com/cpt/90837/)

## From the source

This is BillingBrief’s own explanation, not the official CPT descriptor. For the official code set, see the [American Medical Association](https://www.ama-assn.org/practice-management/cpt).

Code set

CPT

Category

Behavioral health

Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. [About BillingBrief and our sources](https://billingbrief.com/about/).