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  6. 4A1234Z
  • Version 2025
  • Billable Code

2025 ICD-10-CM Procedure Code 4A1234Z

Monitoring of Cardiac Electrical Activity, Percutaneous Approach

ICD-10-PCS Code:
4A1234Z
ICD-10-PCS Code for:
Monitoring of Cardiac Electrical Activity, Perc Approach
Is Billable?
Yes - Valid for Submission
Code Navigator:

4A1234Z is a billable procedure code used to specify the performance of monitoring of cardiac electrical activity, percutaneous approach. The code is valid for the year 2025 for the submission of HIPAA-covered transactions. The procedure code involves determining the level of a physiological or physical function repetitively over a period of time.

4A1234Z PCS Table

In an PCS table each code is represented by up seven alphanumeric characters, with each character in the table respresenting different aspects of the procedure. In the table provided below, each row represents an individual character and includes information about the character's position, designation, label, and procedure notes. For this PCS table the procedure code is in the measurement and monitoring section and is part of the physiological systems body system, classified under monitoring operation. The applicable bodysystem for this procedure code is cardiac.

Position Designation Character Label Procedures Notes
1 Section 4 Measurement and Monitoring
2 Body System A Physiological Systems
3 Operation 1 Monitoring

Involves:
Determining the level of a physiological or physical function repetitively over a period of time
4 BodySystem 2 Cardiac  
5 Approach 3 Percutaneous

Involves:
Entry, by puncture or minor incision, of instrumentation through the skin or mucous membrane and any other body layers necessary to reach the site of the procedure
6 Function/Device 4 Electrical Activity
7 Qualifier Z No Qualifier

Explanation:
The value Z is used for the seventh character to indicate that a specific qualifier does not apply to the procedure.

Replaced Code

4A1234Z was replaced in the 2025 ICD-10-PCS code set with the code(s):

  • 4A1274Z - Monitoring of Cardiac Electrical Activity, Via Opening
  • 4A1274Z - Monitoring of Cardiac Electrical Activity, Via Opening
  • 4A1274Z - Monitoring of Cardiac Electrical Activity, Via Opening
  • 4A1274Z - Monitoring of Cardiac Electrical Activity, Via Opening
  • 4A1274Z - Monitoring of Cardiac Electrical Activity, Via Opening
  • 4A1274Z - Monitoring of Cardiac Electrical Activity, Via Opening
  • 4A1284Z - Monitoring of Cardiac Electrical Activity, Endo
  • 4A1284Z - Monitoring of Cardiac Electrical Activity, Endo
  • 4A1284Z - Monitoring of Cardiac Electrical Activity, Endo
  • 4A1284Z - Monitoring of Cardiac Electrical Activity, Endo
  • 4A1284Z - Monitoring of Cardiac Electrical Activity, Endo
  • 4A1284Z - Monitoring of Cardiac Electrical Activity, Endo

Clinical Classification

Cardiac monitoring

CCSR Code: MAM008

Clinical Domain: Measurement and Monitoring MAM contains 15 categories that include procedures related to the measurement and monitoring of the function of various organs (e.g., brain, heart) and body systems (e.g., cardiovascular system, respiratory system; excludes fetal measurement and monitoring).

Convert to ICD-9-PCS

Below are the ICD-9=PCS code(s) that most closely match this ICD-10-PCS code, based on the General Equivalence Mappings (GEMs). This ICD-10-PCS to ICD-9-PCS crosswalk tool is helpful for coders who need to reference legacy diagnosis codes for audits, historical claims, or approximate code comparisons.

ICD-9-PCS Code

Code: 8944

Approximate Flag: This is an approximate match. The ICD-9-PCS code reflects a close but not exact equivalent of the ICD-10-PCS procedure.

Other ICD-10-PCS Codes Used for Monitoring Cardiac


  • 4A1204Z Monitoring of Cardiac Electrical Activity, Open Approach

  • 4A1209Z Monitoring of Cardiac Output, Open Approach

  • 4A120CZ Monitoring of Cardiac Rate, Open Approach

  • 4A120FZ Monitoring of Cardiac Rhythm, Open Approach

  • 4A120HZ Monitoring of Cardiac Sound, Open Approach

  • 4A1239Z Monitoring of Cardiac Output, Percutaneous Approach

  • 4A123CZ Monitoring of Cardiac Rate, Percutaneous Approach

  • 4A123FZ Monitoring of Cardiac Rhythm, Percutaneous Approach

  • 4A123HZ Monitoring of Cardiac Sound, Percutaneous Approach

  • 4A1274Z Monitoring of Cardiac Electrical Activity, Via Natural or Artificial Opening

  • 4A1279Z Monitoring of Cardiac Output, Via Natural or Artificial Opening

  • 4A127CZ Monitoring of Cardiac Rate, Via Natural or Artificial Opening

  • 4A127FZ Monitoring of Cardiac Rhythm, Via Natural or Artificial Opening

  • 4A127HZ Monitoring of Cardiac Sound, Via Natural or Artificial Opening

  • 4A1284Z Monitoring of Cardiac Electrical Activity, Via Natural or Artificial Opening Endoscopic

  • 4A1289Z Monitoring of Cardiac Output, Via Natural or Artificial Opening Endoscopic

  • 4A128CZ Monitoring of Cardiac Rate, Via Natural or Artificial Opening Endoscopic

  • 4A128FZ Monitoring of Cardiac Rhythm, Via Natural or Artificial Opening Endoscopic

  • 4A128HZ Monitoring of Cardiac Sound, Via Natural or Artificial Opening Endoscopic

  • 4A12X45 Monitoring of Cardiac Electrical Activity, Ambulatory, External Approach

  • 4A12X4Z Monitoring of Cardiac Electrical Activity, External Approach

  • 4A12X9Z Monitoring of Cardiac Output, External Approach

  • 4A12XCZ Monitoring of Cardiac Rate, External Approach

  • 4A12XFZ Monitoring of Cardiac Rhythm, External Approach

  • 4A12XHZ Monitoring of Cardiac Sound, External Approach

  • 4A12XM4 Monitoring of Cardiac Stress, External Approach

  • 4A12XSH Monitoring of Cardiac Vascular Perfusion using Indocyanine Green Dye, External Approach

What is ICD-10-PCS?

The ICD-10 Procedure Coding System (ICD-10-PCS) is a catalog of procedural codes used by medical professionals for hospital inpatient healthcare settings. The Centers for Medicare and Medicaid Services (CMS) maintain the catalog in the U.S. releasing yearly updates. The 2025 ICD-10-PCS codes are to be used for discharges occurring from October 1, 2024 through September 30, 2025.

Each ICD-10-PCS code has a structure of seven alphanumeric characters and contains no decimals. The first character defines the major "section". Depending on the "section" the second through seventh characters mean different things.