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ICD-10-PCS 2027 procedure code

4A1Z7KZMonitoring of Temperature, Via Natural or Artificial Opening

✓ 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 4A1Z7KZ

4A1Z7KZ is the ICD-10-PCS code for a monitoring procedure on the none using a via natural or artificial opening approach with temperature. 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 other nonoperative measurements and examinations, the ICD-9-CM procedure title it maps to (89.39).

The same procedure with a different approach is coded 4A1ZXKZ (external).

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
ZNone
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
KTemperature
7. Qualifier
ZNo Qualifier

Other versions of this procedure

Different approach

ICD-9-CM equivalent

Converter →
  • 89.39Other nonoperative measurements and examinationsapproximate

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 4A1Z7KZ

Is 4A1Z7KZ a valid ICD-10-PCS code for 2027?

Yes. 4A1Z7KZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 4A1Z7KZ?

The CMS GEMs map 4A1Z7KZ to ICD-9-CM 89.39 (Other nonoperative measurements and examinations).