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ICD-10-PCS 2027 procedure code

4A04XR1Measurement of Venous Saturation, Peripheral, External Approach

✓ Valid for 2027

Short description: Measure of Venous Saturation, Peripheral, Extern Approach

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 4A04XR1

4A04XR1 is the ICD-10-PCS code for a measurement procedure on the venous using an external approach with saturation (qualifier: peripheral). 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 measurement of mixed venous blood gases, the ICD-9-CM procedure title it maps to (89.66).

For a different body part, codes include 4A03XR1 (arterial).

The same procedure with a different approach is coded 4A040R1 (open) and 4A043R1 (percutaneous).

With a different device, use 4A04X51 (flow), 4A04XB1 (pressure) and 4A04XJ1 (pulse).

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
4Venous
5. Approach
XExternal

Procedures performed directly on the skin or mucous membrane and procedures performed indirectly by the application of external force through the skin or mucous membrane

6. Function / Device
RSaturation
7. Qualifier
1Peripheral

Other versions of this procedure

Different body system

Different function / device

ICD-9-CM equivalent

Converter →
  • 89.66Measurement of mixed venous blood gasesapproximate

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 4A04XR1

Is 4A04XR1 a valid ICD-10-PCS code for 2027?

Yes. 4A04XR1 is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 4A04XR1?

The CMS GEMs map 4A04XR1 to ICD-9-CM 89.66 (Measurement of mixed venous blood gases).