# CPT 99183

> Medicare paid $112.44 for CPT 99183 in the office (non-facility) setting and $112.44 in a facility under the Q2 2019 Physician Fee Schedule, effective April 2019. These are the national allowed amounts before the ~2% sequestration cut and before locality (GPCI) adjustment. This price has been unchanged since Q1 2019, when it decreased 0.5%.

## 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: Q2 2019 (2019 B)
- Effective: April 1 – June 30, 2019
- Status indicator: A
- Office (non-facility) national allowed amount: $112.44
- Facility national allowed amount: $112.44
- Sequestration: not applied

## RVUs and formula

- Work RVU: 2.11
- Office (non-facility) practice expense RVU: 0.76
- Facility practice expense RVU: 0.76
- Malpractice RVU: 0.25
- Conversion factor: 36.0391
- Formula: `(work_rvu × work_gpci + pe_rvu × pe_gpci + mp_rvu × mp_gpci) × conversion_factor`

## Source and citation

- Source: Physician relative value file (Q2 2019)
- CMS file: https://www.cms.gov/medicare/medicare-fee-for-service-payment/physicianfeesched/downloads/rvu19b.zip
- Parsed file: PPRRVU19_APR.csv, row 16,787
- Canonical page: https://localishealth.com/cpt/99183/2019/A
- Release-specific citation URL: https://localishealth.com/cpt/99183/2019/B
- Last significant update: 2026-08-04T03:08:53+00:00