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ICD-10-PCS 2027 procedure code

4A0274ZMeasurement of Cardiac Electrical Activity, Via Natural or Artificial Opening

✓ Valid for 2027

Short description: Measurement of Cardiac Electrical Activity, Via Opening

Code last changed in FY2018 (effective October 1, 2017). Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data

About 4A0274Z

4A0274Z is the ICD-10-PCS code for a measurement procedure on the cardiac using a via natural or artificial opening 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 other nonoperative cardiac and vascular measurements, the ICD-9-CM procedure title it maps to (89.59).

For a different body part, codes include 4A0074Z (central nervous), 4A0174Z (peripheral nervous), 4A0H74Z (products of conception, cardiac) and 4A0J74Z (products of conception, nervous).

The same procedure with a different approach is coded 4A0204Z (open), 4A0234Z (percutaneous), 4A0284Z (via natural or artificial opening endoscopic) and 4A02X4Z (external).

With a different device, use 4A0279Z (output), 4A027CZ (rate), 4A027FZ (rhythm), 4A027HZ (sound) and 4A027PZ (action currents).

It doesn't appear in the MS-DRG procedure index, so on its own it doesn't change the DRG assignment.

It was added in FY2018, effective October 1, 2017.

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
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
4Electrical Activity
7. Qualifier
ZNo Qualifier

Other versions of this procedure

ICD-9-CM equivalent

Converter →
  • 89.59Other nonoperative cardiac and vascular measurementsapproximate

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
  • FY2018 (effective 10/1/2017): Added
  • No changes since FY2018.

Common questions about 4A0274Z

Is 4A0274Z a valid ICD-10-PCS code for 2027?

Yes. 4A0274Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 4A0274Z?

The CMS GEMs map 4A0274Z to ICD-9-CM 89.59 (Other nonoperative cardiac and vascular measurements).