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ICD-10-PCS 2027 procedure code

4A003RDMeasurement of Intracranial Saturation, Percutaneous Approach

✓ Valid for 2027

Short description: Measurement of Intracranial Saturation, Perc 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 4A003RD

4A003RD is the ICD-10-PCS code for a measurement procedure on the central nervous using a percutaneous approach with saturation (qualifier: intracranial). 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 intracranial oxygen monitoring, the ICD-9-CM procedure title it maps to (01.16).

The same procedure with a different approach is coded 4A007RD (via natural or artificial opening) and 4A008RD (via natural or artificial opening endoscopic).

With a different device, use 4A003BD (pressure) and 4A003KD (temperature).

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
0Central Nervous
5. Approach
3Percutaneous

Entry, by puncture or minor incision, of instrumentation through the skin or mucous membrane and any other body layers necessary to reach the site of the procedure

6. Function / Device
RSaturation
7. Qualifier
DIntracranial

Other versions of this procedure

Different function / device

ICD-9-CM equivalent

Converter →
  • 01.16Intracranial oxygen monitoringapproximate

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 4A003RD

Is 4A003RD a valid ICD-10-PCS code for 2027?

Yes. 4A003RD is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 4A003RD?

The CMS GEMs map 4A003RD to ICD-9-CM 01.16 (Intracranial oxygen monitoring).