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ICD-10-PCS 2027 procedure code

4A13XR1Monitoring of Arterial Saturation, Peripheral, External Approach

✓ Valid for 2027

Short description: Monitor of Arterial 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 4A13XR1

4A13XR1 is the ICD-10-PCS code for a monitoring procedure on the arterial using an external approach with saturation (qualifier: peripheral). In ICD-10-PCS, monitoring means determining the level of a physiological or physical function repetitively over a period of time.

In plain terms, this corresponds to continuous intra-arterial blood gas monitoring and measurement of systemic arterial blood gases, the ICD-9-CM procedure titles it maps to (89.60 and 89.65).

The same procedure with a different approach is coded 4A130R1 (open) and 4A133R1 (percutaneous).

With a different device, use 4A13X51 (flow), 4A13XB1 (pressure), 4A13XH1 (sound) and 4A13XJ1 (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
1Monitoring

Determining the level of a physiological or physical function repetitively over a period of time

4. Body System
3Arterial
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

ICD-9-CM equivalent

Converter →
  • 89.60Continuous intra-arterial blood gas monitoringapproximate
  • 89.65Measurement of systemic arterial 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 4A13XR1

Is 4A13XR1 a valid ICD-10-PCS code for 2027?

Yes. 4A13XR1 is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 4A13XR1?

The CMS GEMs map 4A13XR1 to ICD-9-CM 89.60 (Continuous intra-arterial blood gas monitoring) and 89.65 (Measurement of systemic arterial blood gases).