# CPT 00813

> CPT 00813 is an anesthesia code, so Medicare has no single national rate: payment is (base units + time units) × the locality's anesthesia conversion factor — for example, about $148.87 for a 30-minute case in Dallas, TX under the Q3 2021 release, before sequestration.

## What it is

Anesthesia care when a patient has both an upper endoscopy and a lower endoscopy under the same anesthetic, in one session. It exists so that a back-to-back scope of the esophagus, stomach and duodenum plus a colonoscopy is reported once rather than as two separate anesthesia services. The anesthesia professional keeps the patient sedated across both parts, including the change in position and the shared airway during the upper portion.

## Selected release

- Release: Q3 2021 (2021 C)
- Effective: July 1 – September 30, 2021
- Status indicator: J
- Office (non-facility) national allowed amount: not published
- Facility national allowed amount: not published
- Sequestration: not applied

## RVUs and formula

- Work RVU: not published
- Office (non-facility) practice expense RVU: not published
- Facility practice expense RVU: not published
- Malpractice RVU: not published
- Conversion factor: 34.8931
- Formula: `(work_rvu × work_gpci + pe_rvu × pe_gpci + mp_rvu × mp_gpci) × conversion_factor`

## Source and citation

- Source: Physician relative value file (Q3 2021)
- CMS file: https://www.cms.gov/files/zip/rvu21c-updated-6302021.zip
- Parsed file: PPRRVU21_JUL.csv, row 5,107
- Canonical page: https://localishealth.com/cpt/00813/2021/C
- Release-specific citation URL: https://localishealth.com/cpt/00813/2021/C
- Last significant update: 2026-08-04T03:10:45+00:00