---
title: "CPT 99231: Subsequent hospital or observation care… | BillingBrief"
description: "A follow-up inpatient or observation visit with straightforward or low-complexity medical decision making."
canonical: "https://billingbrief.com/cpt/99231/"
language: "en"
---

# 99231 Subsequent hospital or observation care, straightforward or low complexity

CPT · [BillingBrief summary](#source)

A follow-up inpatient or observation visit with straightforward or low-complexity medical decision making.

## What to know

-   Time threshold: 25 minutes or more.

## Related codes

-   [`99232` Subsequent hospital or observation care, moderate complexity CPT](https://billingbrief.com/cpt/99232/)
-   [`99233` Subsequent hospital or observation care, high complexity CPT](https://billingbrief.com/cpt/99233/)
-   [`99221` Initial hospital or observation care, straightforward or low complexity CPT](https://billingbrief.com/cpt/99221/)

## 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

Hospital care (E/M)

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/).