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ICD-10-PCS 2027 procedure code

4A0ZXKZMeasurement of Temperature, External Approach

✓ Valid for 2027

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 4A0ZXKZ

4A0ZXKZ is the ICD-10-PCS code for a measurement procedure on the none using an external approach with temperature. 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 cerebral thermography, ocular thermography, bone thermography and 4 more, the ICD-9-CM procedure titles it maps to (88.81, 88.82, 88.83 and 4 more).

The same procedure with a different approach is coded 4A0Z7KZ (via natural or artificial opening).

With a different device, use 4A0ZX6Z (metabolism) and 4A0ZXQZ (sleep).

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
ZNone
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
KTemperature
7. Qualifier
ZNo Qualifier

Other versions of this procedure

Different function / device

ICD-9-CM equivalent

Converter →
  • 88.81Cerebral thermographyapproximate
  • 88.82Ocular thermographyapproximate
  • 88.83Bone thermographyapproximate
  • 88.84Muscle thermographyapproximate
  • 88.85Breast thermographyapproximate
  • 88.86Blood vessel thermographyapproximate
  • 88.89Thermography of other sitesapproximate

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 4A0ZXKZ

Is 4A0ZXKZ a valid ICD-10-PCS code for 2027?

Yes. 4A0ZXKZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 4A0ZXKZ?

The CMS GEMs map 4A0ZXKZ to ICD-9-CM 88.81 (Cerebral thermography), 88.82 (Ocular thermography), 88.83 (Bone thermography) and 4 more.