# CPT 94727

> Medicare paid $44.66 for CPT 94727 in the office (non-facility) setting and $44.66 in a facility under the Q2 2021 Physician Fee Schedule, effective April 2021. These are the national allowed amounts before the ~2% sequestration cut and before locality (GPCI) adjustment. This price has been unchanged since Q1 2021, when it increased 0.6%.

## What it is

The same goal as the sealed-booth test - measuring total lung capacity and the air remaining after a full exhale - but reached by a different route. The patient breathes a tracer gas mixture, usually helium, or breathes pure oxygen to wash nitrogen out of the lungs, and the machine works out lung volume from how much the gas is diluted or how much nitrogen comes back. It can also show how evenly air distributes through the lungs. Because it only measures air that the tracer gas can actually reach, it can underestimate volume when airways are badly blocked.

## Selected release

- Release: Q2 2021 (2021 B)
- Effective: April 1 – June 30, 2021
- Status indicator: A
- Office (non-facility) national allowed amount: $44.66
- Facility national allowed amount: $44.66
- Sequestration: not applied

## RVUs and formula

- Work RVU: 0.26
- Office (non-facility) practice expense RVU: 1.00
- Facility practice expense RVU: 1.00
- Malpractice RVU: 0.02
- 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 (Q2 2021)
- CMS file: https://www.cms.gov/files/zip/rvu21b-updated-03022021.zip
- Parsed file: PPRRVU21_APR.csv, row 16,619
- Canonical page: https://localishealth.com/cpt/94727/2021/A
- Release-specific citation URL: https://localishealth.com/cpt/94727/2021/B
- Last significant update: 2026-08-04T03:10:33+00:00