ICD-10-PCS 2027 procedure code
4A02X4ZMeasurement of Cardiac Electrical Activity, External Approach
Short description: Measurement of Cardiac Electrical Activity, 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 4A02X4Z
4A02X4Z is the ICD-10-PCS code for a measurement procedure on the cardiac using an external approach with electrical activity. 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 Noninvasive programmed electrical stimulation [NIPS], electrocardiogram and Apexcardiogram (with ECG lead), the ICD-9-CM procedure titles it maps to (37.20, 89.52 and 89.57).
For a different body part, codes include 4A00X4Z (central nervous), 4A01X4Z (peripheral nervous), 4A0HX4Z (products of conception, cardiac) and 4A0JX4Z (products of conception, nervous).
The same procedure with a different approach is coded 4A0204Z (open), 4A0234Z (percutaneous), 4A0274Z (via natural or artificial opening) and 4A0284Z (via natural or artificial opening endoscopic).
With a different device, use 4A02X9Z (output), 4A02XCZ (rate), 4A02XFZ (rhythm), 4A02XHZ (sound) and 4A02XPZ (action currents).
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
- 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
- 4Electrical Activity
- 7. Qualifier
- ZNo Qualifier
Other versions of this procedure
Different body system
Different approach
Different function / device
Different qualifier
ICD-9-CM equivalent
Converter →- 37.20Noninvasive programmed electrical stimulation [NIPS]approximate
- 89.52Electrocardiogramapproximate
- 89.57Apexcardiogram (with ECG lead)approximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about 4A02X4Z
Is 4A02X4Z a valid ICD-10-PCS code for 2027?
- Yes. 4A02X4Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
What is the ICD-9 procedure code for 4A02X4Z?
- The CMS GEMs map 4A02X4Z to ICD-9-CM 37.20 (Noninvasive programmed electrical stimulation [NIPS]), 89.52 (Electrocardiogram) and 89.57 (Apexcardiogram (with ECG lead)).