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ICD-10-PCS 2027 procedure code

4A0975ZMeasurement of Respiratory Flow, Via Natural or Artificial Opening

✓ Valid for 2027

Short description: Measurement of Respiratory Flow, 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 4A0975Z

4A0975Z is the ICD-10-PCS code for a measurement procedure on the respiratory using a via natural or artificial opening approach with flow. 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 other nonoperative respiratory measurements, the ICD-9-CM procedure title it maps to (89.38).

For a different body part, codes include 4A0675Z (lymphatic), 4A0C75Z (biliary) and 4A0D75Z (urinary).

The same procedure with a different approach is coded 4A0985Z (via natural or artificial opening endoscopic) and 4A09X5Z (external).

With a different device, use 4A0971Z (capacity), 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
5Flow
7. Qualifier
ZNo Qualifier

Other versions of this procedure

ICD-9-CM equivalent

Converter →
  • 89.38Other nonoperative respiratory measurementsapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about 4A0975Z

Is 4A0975Z a valid ICD-10-PCS code for 2027?

Yes. 4A0975Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 4A0975Z?

The CMS GEMs map 4A0975Z to ICD-9-CM 89.38 (Other nonoperative respiratory measurements).