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ICD-10-PCS 2027 procedure code

4A027FZMeasurement of Cardiac Rhythm, Via Natural or Artificial Opening

✓ Valid for 2027Non-O.R. procedure

Short description: Measurement of Cardiac Rhythm, 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 4A027FZ

4A027FZ is the ICD-10-PCS code for a measurement procedure on the cardiac using a via natural or artificial opening approach with rhythm. 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 4A0H7FZ (products of conception, cardiac).

The same procedure with a different approach is coded 4A020FZ (open), 4A023FZ (percutaneous), 4A028FZ (via natural or artificial opening endoscopic) and 4A02XFZ (external).

With a different device, use 4A0274Z (electrical activity), 4A0279Z (output), 4A027CZ (rate), 4A027HZ (sound) and 4A027PZ (action currents).

It is a non-O.R. procedure that is part of the MS-DRG logic for DRG 212 (Concomitant Aortic and Mitral Valve Procedures), DRG 216 (Cardiac Valve and Other Major Cardiothoracic Procedures with Cardiac Catheterization with MCC), DRG 217 (Cardiac Valve and Other Major Cardiothoracic Procedures with Cardiac Catheterization with CC), DRG 218 (Cardiac Valve and Other Major Cardiothoracic Procedures with Cardiac Catheterization without CC/MCC), DRG 273 (Percutaneous and Other Intracardiac Procedures with MCC) and DRG 274 (Percutaneous and Other Intracardiac Procedures without MCC), under the surgical categories “Concomitant Aortic and Mitral Valve Procedures”, “” and “Percutaneous and Other Intracardiac Procedures”.

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
FRhythm
7. Qualifier
ZNo Qualifier

Other versions of this procedure

MS-DRG v44.0 grouping

All DRGs →

Surgical MS-DRGs this procedure can group to, depending on the principal diagnosis's MDC.

MDC 05 · Diseases and Disorders of the Circulatory System · Concomitant Aortic and Mitral Valve Procedures

MDC 05 · Diseases and Disorders of the Circulatory System · Percutaneous and Other Intracardiac Procedures

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 4A027FZ

Is 4A027FZ a valid ICD-10-PCS code for 2027?

Yes. 4A027FZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 4A027FZ an O.R. procedure?

No. 4A027FZ is designated non-O.R. in MS-DRG v44.0.

What DRG does 4A027FZ group to?

Depending on the principal diagnosis, 4A027FZ can group to MS-DRG 212, MS-DRG 216, MS-DRG 217, MS-DRG 218, MS-DRG 273 and MS-DRG 274.

What is the ICD-9 procedure code for 4A027FZ?

The CMS GEMs map 4A027FZ to ICD-9-CM 89.59 (Other nonoperative cardiac and vascular measurements).