ICD-10-PCS 2027 procedure code
4A0971ZMeasurement of Respiratory Capacity, Via Natural or Artificial Opening
Short description: Measurement of Respiratory Capacity, Via Opening
Code unchanged since ICD-10-PCS took effect on October 1, 2015. Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data
About 4A0971Z
4A0971Z is the ICD-10-PCS code for a measurement procedure on the respiratory using a via natural or artificial opening approach with capacity. In ICD-10-PCS, measurement means determining the level of a physiological or physical function at a point in time.
In plain terms, this corresponds to Vital capacity determination, the ICD-9-CM procedure title it maps to (89.37).
The same procedure with a different approach is coded 4A0981Z (via natural or artificial opening endoscopic) and 4A09X1Z (external).
With a different device, use 4A0975Z (flow), 4A097CZ (rate), 4A097DZ (resistance), 4A097LZ (volume) and 4A097MZ (total activity).
It doesn't appear in the MS-DRG procedure index, so on its own it doesn't change the DRG assignment.
It has been valid since ICD-10-PCS took effect on October 1, 2015.
What each character means
- 1. Section
- 4Measurement and Monitoring
- 2. Body System
- APhysiological Systems
- 3. Operation
- 0Measurement
Determining the level of a physiological or physical function at a point in time
- 4. Body System
- 9Respiratory
- 5. Approach
- 7Via Natural or Artificial Opening
Entry of instrumentation through a natural or artificial external opening to reach the site of the procedure
- 6. Function / Device
- 1Capacity
- 7. Qualifier
- ZNo Qualifier
Other versions of this procedure
Different approach
Different function / device
ICD-9-CM equivalent
Converter →- 89.37Vital capacity determinationapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about 4A0971Z
Is 4A0971Z a valid ICD-10-PCS code for 2027?
- Yes. 4A0971Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
What is the ICD-9 procedure code for 4A0971Z?
- The CMS GEMs map 4A0971Z to ICD-9-CM 89.37 (Vital capacity determination).