ICD-10-PCS Code For Cardiac: Procedure Code Group Overview

The International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS) code group 4A02 includes procedures performed to measure conduction functions in the cardiac physiological system. These ICD-10-PCS codes are used for inpatient documentation when clinicians perform diagnostic measurement or monitoring of cardiac conduction to determine conduction status or guide treatment. Accurate coding within the ICD-10-PCS 4A02 group is essential for proper inpatient reimbursement, as it captures the procedure performed and supports clinical documentation accuracy.

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Cardiac Measurement Procedure Overview

Procedures in this group involve measuring conduction-related physiological functions of the heart to determine the level of electrical conduction at a point in time. These measurements target the cardiac physiological systems and commonly include tests and monitoring that quantify conduction parameters. Accurate coding of these measurement procedures matters for inpatient reimbursement because it documents the specific diagnostic monitoring performed and supports appropriate case mix classification and payment.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
4	Section	Measurement and Monitoring
A	Body System	Physiological Systems
0	Operation	Measurement
2	Body Part	Cardiac

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ICD-10-PCS Code For Cardiac: Procedure Code Group Overview

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Cardiac Measurement Procedure Overview

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
4	Section	Measurement and Monitoring
A	Body System	Physiological Systems
0	Operation	Measurement
2	Body Part	Cardiac

When to Use

Use a code from this group when a measurement procedure is performed to evaluate cardiac electrical conduction during an inpatient encounter. Codes in this group apply when documentation shows a discrete conduction measurement or monitoring event was performed to determine conduction status.

ICD-10-PCS Codes

44 rows

ICD-10-PCS Code	Description
4A0204Z	Measurement of Cardiac Electrical Activity, Open Approach
4A0209Z	Measurement of Cardiac Output, Open Approach
4A020CZ	Measurement of Cardiac Rate, Open Approach
4A020FZ	Measurement of Cardiac Rhythm, Open Approach
4A020HZ	Measurement of Cardiac Sound, Open Approach
4A020N6	Measurement of Cardiac Sampling and Pressure, Right Heart, Open Approach
4A020N7	Measurement of Cardiac Sampling and Pressure, Left Heart, Open Approach
4A020N8	Measurement of Cardiac Sampling and Pressure, Bilateral, Open Approach
4A020PZ	Measurement of Cardiac Action Currents, Open Approach
4A0234Z	Measurement of Cardiac Electrical Activity, Percutaneous Approach

Showing 1–10 of 44

DRG Codes

11 rows

DRG Code	Description
212	Concomitant Aortic and Mitral Valve Procedures
216	Cardiac Valve and Other Major Cardiothoracic Procedures with Cardiac Catheterization with MCC
217	Cardiac Valve and Other Major Cardiothoracic Procedures with Cardiac Catheterization with CC
218	Cardiac Valve and Other Major Cardiothoracic Procedures with Cardiac Catheterization without CC/MCC
233	Coronary Bypass with Cardiac Catheterization or Open Ablation with MCC
234	Coronary Bypass with Cardiac Catheterization or Open Ablation without MCC
273	Percutaneous and Other Intracardiac Procedures with MCC
274	Percutaneous and Other Intracardiac Procedures without MCC
275	Cardiac Defibrillator Implant with Cardiac Catheterization and MCC
286	Circulatory Disorders Except AMI, with Cardiac Catheterization with MCC

Showing 1–10 of 11

Typical Clinical Scenarios

An elderly patient is admitted with syncope and recurrent presyncope episodes after pacemaker interrogation suggests intermittent high-degree AV block; inpatient evaluation includes direct measurement of cardiac conduction to quantify conduction delays and guide urgent management, often performed via transvenous intracardiac monitoring during monitoring or device lead assessment. Typical codes: 4A023FZ, 4A023CZ
A middle-aged patient scheduled for elective evaluation of unexplained palpitations and suspected supraventricular tachycardia is admitted for invasive electrophysiologic study to map conduction pathways and determine precise conduction intervals; measurement procedures are performed percutaneously during the planned diagnostic study to localize the arrhythmia substrate. Typical codes: 4A0234Z, 4A023PZ
A postoperative patient in the cardiac unit develops new hemodynamic instability with concern for right heart failure after valve surgery; bedside percutaneous cardiac pressure sampling and measurement of conduction and pressure gradients are obtained to assess right and left heart pressures and conduction status to inform immediate management. Typical codes: 4A023N6, 4A023N7

Related Codes

4A00-CENTRAL-NERVOUS-MEASUREMENT

ICD-10-PCS Code For Central Nervous: Procedure Code Group Overview

4A01-PERIPHERAL-NERVOUS-MEASUREMENT

ICD-10-PCS Code For Peripheral Nervous: Procedure Code Group Overview

4A03-ARTERIAL-MEASUREMENT

ICD-10-PCS Code For Arterial: Procedure Code Group Overview

4A04-VENOUS-MEASUREMENT

ICD-10-PCS Code For Venous: Procedure Code Group Overview

4A05-CIRCULATORY-MEASUREMENT

ICD-10-PCS Code For Circulatory: Procedure Code Group Overview

4A06-LYMPHATIC-MEASUREMENT

ICD-10-PCS Code For Lymphatic: Procedure Code Group Overview

4A07-VISUAL-MEASUREMENT

ICD-10-PCS Code For Visual: Procedure Code Group Overview

4A08-OLFACTORY-MEASUREMENT

ICD-10-PCS Code For Olfactory: Procedure Code Group Overview

4A09-RESPIRATORY-MEASUREMENT

ICD-10-PCS Code For Respiratory: Procedure Code Group Overview

4A0B-GASTROINTESTINAL-MEASUREMENT

ICD-10-PCS Code For Gastrointestinal: Procedure Code Group Overview

Showing 1–10 of 16

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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When to Use

ICD-10-PCS Codes

44 rows

ICD-10-PCS Code	Description
4A0204Z	Measurement of Cardiac Electrical Activity, Open Approach
4A0209Z	Measurement of Cardiac Output, Open Approach
4A020CZ	Measurement of Cardiac Rate, Open Approach
4A020FZ	Measurement of Cardiac Rhythm, Open Approach
4A020HZ	Measurement of Cardiac Sound, Open Approach
4A020N6	Measurement of Cardiac Sampling and Pressure, Right Heart, Open Approach
4A020N7	Measurement of Cardiac Sampling and Pressure, Left Heart, Open Approach
4A020N8	Measurement of Cardiac Sampling and Pressure, Bilateral, Open Approach
4A020PZ	Measurement of Cardiac Action Currents, Open Approach
4A0234Z	Measurement of Cardiac Electrical Activity, Percutaneous Approach

Showing 1–10 of 44

DRG Codes

11 rows

DRG Code	Description
212	Concomitant Aortic and Mitral Valve Procedures
216	Cardiac Valve and Other Major Cardiothoracic Procedures with Cardiac Catheterization with MCC
217	Cardiac Valve and Other Major Cardiothoracic Procedures with Cardiac Catheterization with CC
218	Cardiac Valve and Other Major Cardiothoracic Procedures with Cardiac Catheterization without CC/MCC
233	Coronary Bypass with Cardiac Catheterization or Open Ablation with MCC
234	Coronary Bypass with Cardiac Catheterization or Open Ablation without MCC
273	Percutaneous and Other Intracardiac Procedures with MCC
274	Percutaneous and Other Intracardiac Procedures without MCC
275	Cardiac Defibrillator Implant with Cardiac Catheterization and MCC
286	Circulatory Disorders Except AMI, with Cardiac Catheterization with MCC

Showing 1–10 of 11

Typical Clinical Scenarios

An elderly patient is admitted with syncope and recurrent presyncope episodes after pacemaker interrogation suggests intermittent high-degree AV block; inpatient evaluation includes direct measurement of cardiac conduction to quantify conduction delays and guide urgent management, often performed via transvenous intracardiac monitoring during monitoring or device lead assessment. Typical codes: 4A023FZ, 4A023CZ
A middle-aged patient scheduled for elective evaluation of unexplained palpitations and suspected supraventricular tachycardia is admitted for invasive electrophysiologic study to map conduction pathways and determine precise conduction intervals; measurement procedures are performed percutaneously during the planned diagnostic study to localize the arrhythmia substrate. Typical codes: 4A0234Z, 4A023PZ
A postoperative patient in the cardiac unit develops new hemodynamic instability with concern for right heart failure after valve surgery; bedside percutaneous cardiac pressure sampling and measurement of conduction and pressure gradients are obtained to assess right and left heart pressures and conduction status to inform immediate management. Typical codes: 4A023N6, 4A023N7

Related Codes

4A00-CENTRAL-NERVOUS-MEASUREMENT

ICD-10-PCS Code For Central Nervous: Procedure Code Group Overview

4A01-PERIPHERAL-NERVOUS-MEASUREMENT

ICD-10-PCS Code For Peripheral Nervous: Procedure Code Group Overview

4A03-ARTERIAL-MEASUREMENT

ICD-10-PCS Code For Arterial: Procedure Code Group Overview

4A04-VENOUS-MEASUREMENT

ICD-10-PCS Code For Venous: Procedure Code Group Overview

4A05-CIRCULATORY-MEASUREMENT

ICD-10-PCS Code For Circulatory: Procedure Code Group Overview

4A06-LYMPHATIC-MEASUREMENT

ICD-10-PCS Code For Lymphatic: Procedure Code Group Overview

4A07-VISUAL-MEASUREMENT

ICD-10-PCS Code For Visual: Procedure Code Group Overview

4A08-OLFACTORY-MEASUREMENT

ICD-10-PCS Code For Olfactory: Procedure Code Group Overview

4A09-RESPIRATORY-MEASUREMENT

ICD-10-PCS Code For Respiratory: Procedure Code Group Overview

4A0B-GASTROINTESTINAL-MEASUREMENT

ICD-10-PCS Code For Gastrointestinal: Procedure Code Group Overview

Showing 1–10 of 16

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

ICD-10-PCS Code For Cardiac: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Cardiac: Procedure Code Group Overview policy alerts

Cardiac Measurement Procedure Overview

Code Attributes

ICD-10-PCS Code For Cardiac: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Cardiac: Procedure Code Group Overview policy alerts

Cardiac Measurement Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-PCS section and operation describe the 4A02 code group?

What types of cardiac measurements are represented in ICD-10-PCS 4A02 codes?

How must clinicians document procedures to ensure accurate coding within the 4A02 group?

Can you list examples of specific ICD-10-PCS codes in the 4A02 group for percutaneous approach measurements?

Which DRGs are related to procedures in the 4A02 group?

References

When to Use

ICD-10-PCS Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-PCS section and operation describe the 4A02 code group?

What types of cardiac measurements are represented in ICD-10-PCS 4A02 codes?

How must clinicians document procedures to ensure accurate coding within the 4A02 group?

Can you list examples of specific ICD-10-PCS codes in the 4A02 group for percutaneous approach measurements?

Which DRGs are related to procedures in the 4A02 group?

References