# CPT 99183

> Medicare paid $114.04 for CPT 99183 in the office (non-facility) setting and $114.04 in a facility under the Q1 2020 Physician Fee Schedule, effective January 2020. These are the national allowed amounts before the ~2% sequestration cut and before locality (GPCI) adjustment. This is a 1.4% increase from the previous quarter.

## What it is

The physician's attendance and supervision during a session of hyperbaric oxygen therapy, in which the patient breathes pure oxygen inside a pressurised chamber to drive far more oxygen than usual into the bloodstream and tissues. This code captures the doctor's part — assessing the patient beforehand, setting and adjusting the pressure and duration, and being on hand for complications such as ear barotrauma or oxygen toxicity — and not the chamber time itself, which the facility accounts for separately. It is reported once for each session attended.

## Selected release

- Release: Q1 2020 (2020 A)
- Effective: January 1 – March 31, 2020
- Status indicator: A
- Office (non-facility) national allowed amount: $114.04
- Facility national allowed amount: $114.04
- Sequestration: not applied

## RVUs and formula

- Work RVU: 2.11
- Office (non-facility) practice expense RVU: 0.78
- Facility practice expense RVU: 0.78
- Malpractice RVU: 0.27
- Conversion factor: 36.0896
- Formula: `(work_rvu × work_gpci + pe_rvu × pe_gpci + mp_rvu × mp_gpci) × conversion_factor`

## Source and citation

- Source: Physician relative value file (Q1 2020)
- CMS file: https://www.cms.gov/files/zip/rvu20a-updated-01312020.zip
- Parsed file: PPRRVU20_Jan.csv, row 17,047
- Canonical page: https://localishealth.com/cpt/99183/2020/A
- Release-specific citation URL: https://localishealth.com/cpt/99183/2020/A
- Last significant update: 2026-08-04T03:09:22+00:00