4A028FZMeasurement of Cardiac Rhythm, Via Natural or Artificial Opening Endoscopic

Measurement and Monitoring›Physiological Systems›Measurement
  • Billable / Specific Code
ICD-10-PCS 4A028FZ
CMS Source: FY 2027 ICD-10-PCS dataset. Effective Oct 1, 2026 – Sep 30, 2027.FacebookXLinkedInPrint

4A028FZ is a billable ICD-10-PCS procedure code for Measurement of Cardiac Rhythm, Via Natural or Artificial Opening Endoscopic. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to 6 MS-DRGs. The root operation Measurement involves determining the level of a physiological or physical function at a point in time. In AHRQ's Clinical Classifications Software (CCSR), this procedure falls under Electrocardiogram (ECG).

Code Identity

ICD-10-PCS Code
4A028FZ
Billable Status
Yes — Valid for Submission
Code Describes
Measurement of Cardiac Rhythm, Via Natural or Artificial Opening Endoscopic
Short Description
Measurement of Cardiac Rhythm, Endo
Parent Code
4A0

PCS Table Breakdown

Each ICD-10-PCS code is built from seven characters, each an axis of the procedure. Hover or tap the icons for the official CMS definitions.

PositionDesignationValueMeaning
1Section4Measurement and Monitoring
2Body SystemAPhysiological Systems
3Operation0Measurement
4BodySystem2Cardiac
5Approach8Via Natural or Artificial Opening Endoscopic
6Function/DeviceFRhythm
7QualifierZNo Qualifier

In the ICD-10-PCS Alphabetic Index

These FY 2027 ICD-10-PCS Alphabetic Index entries lead to this code:

Catheterization, Heart
Leads to this code's table
VCG (vectorcardiogram)
Leads to this code's table
EKG (electrocardiogram)
Leads to this code's table
Measurement, Cardiac, Rate
Leads to this code's table
Rhythm electrocardiogram
Leads to this code's table
Measurement, Cardiac, Sound
Leads to this code's table
Measurement, Cardiac, Output
Leads to this code's table
Measurement, Cardiac, Rhythm
Leads to this code's table
Mapping, Electrocardiogram only
Leads to this code's table
Guidance, catheter placement, EKG
Leads to this code's table
Measurement, Cardiac, Action Currents
Leads to this code's table
Electrophysiologic stimulation (EPS)
Leads to this code's table
EPS (electrophysiologic stimulation)
Leads to this code's table
Measurement, Cardiac, Electrical Activity
Leads to this code's table
Study, Electrophysiologic stimulation, cardiac
Leads to this code's table

To code catheterization of the heart, open the FY 2027 ICD-10-PCS Alphabetic Index at Catheterization, then the subterm Heart. The index leads to table 4A0, where the approach, Function/Device and qualifier values shown in the breakdown above complete the seven-character code 4A028FZ.

Browse the full ICD-10-PCS Alphabetic Index →

Clinical Classification (CCSR)

AHRQ groups this procedure code into these clinical categories.

MAM007
Electrocardiogram (ECG)
Clinical domain: Measurement and Monitoring

Code History

Replaces previously assigned code(s):
  • 4A023FZ — Measurement of Cardiac Rhythm, Percutaneous Approach

Similar Procedure Codes

Questions About 4A028FZ

Is 4A028FZ a billable code?

Yes. This is a complete seven-character ICD-10-PCS code, specific enough to report Measurement of Cardiac Rhythm, Via Natural or Artificial Opening Endoscopic on inpatient claims from October 1, 2026 through September 30, 2027.

What do the characters in 4A028FZ mean?

The code breaks down character by character: the 1st character 4 is the Section (Measurement and Monitoring); the 2nd character A is the Body System (Physiological Systems); the 3rd character 0 is the Operation (Measurement); the 4th character 2 is the BodySystem (Cardiac); the 5th character 8 is the Approach (Via Natural or Artificial Opening Endoscopic); the 6th character F is the Function/Device (Rhythm); the 7th character Z is the Qualifier (No Qualifier).

What MS-DRG does 4A028FZ group to?

On an inpatient stay, Measurement of Cardiac Rhythm, Via Natural or Artificial Opening Endoscopic maps to MS-DRGs 212, 216, 217, 218, 273, 274, with relative weights from 3.3320 to 11.4416. The MS-DRG sets the fixed Medicare payment for the stay.