Skip to content
Dx

ICD-10-PCS 2027 procedure code

4A12XCZMonitoring of Cardiac Rate, 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 4A12XCZ

4A12XCZ is the ICD-10-PCS code for a monitoring procedure on the cardiac using an external approach with rate. 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 carotid pulse tracing with ECG lead, the ICD-9-CM procedure title it maps to (89.56).

For a different body part, codes include 4A19XCZ (respiratory) and 4A1HXCZ (products of conception, cardiac).

The same procedure with a different approach is coded 4A120CZ (open), 4A123CZ (percutaneous), 4A127CZ (via natural or artificial opening) and 4A128CZ (via natural or artificial opening endoscopic).

With a different device, use 4A12X4Z (electrical activity), 4A12X9Z (output), 4A12XFZ (rhythm) and 4A12XHZ (sound).

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
2Cardiac
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
CRate
7. Qualifier
ZNo Qualifier

Other versions of this procedure

ICD-9-CM equivalent

Converter →
  • 89.56Carotid pulse tracing with ECG leadapproximate

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 4A12XCZ

Is 4A12XCZ a valid ICD-10-PCS code for 2027?

Yes. 4A12XCZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 4A12XCZ?

The CMS GEMs map 4A12XCZ to ICD-9-CM 89.56 (Carotid pulse tracing with ECG lead).