4A123HZMonitoring of Cardiac Sound, Percutaneous Approach

Measurement and Monitoring›Physiological Systems›Monitoring
  • Billable / Specific Code
ICD-10-PCS 4A123HZ
CMS Source: FY 2026 ICD-10-PCS dataset. Effective Oct 1, 2025 – Sep 30, 2026.FacebookXLinkedInPrint

4A123HZ is a billable ICD-10-PCS procedure code for Monitoring of Cardiac Sound, Percutaneous Approach. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The root operation Monitoring involves determining the level of a physiological or physical function repetitively over a period of time.

Code Identity

ICD-10-PCS Code
4A123HZ
Billable Status
Yes — Valid for Submission
Code Describes
Monitoring of Cardiac Sound, Percutaneous Approach
Parent Code
4A1
Short Description
Monitoring of Cardiac Sound, Percutaneous Approach

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
3Operation1Monitoring
4BodySystem2Cardiac
5Approach3Percutaneous
6Function/DeviceHSound
7QualifierZNo Qualifier

Convert to ICD-9-PCS

Closest ICD-9-PCS equivalents for 4A123HZ under the General Equivalence Mappings.

89.59
Approximate match.

Code History

Replaced in the FY 2026 code set by:
  • 4A127HZ — Monitoring of Cardiac Sound, Via Opening
  • 4A128HZ — Monitoring of Cardiac Sound, Endo

Similar Procedure Codes

Questions About 4A123HZ

Is 4A123HZ a billable code?

Yes. 4A123HZ is a complete seven-character ICD-10-PCS code, specific enough to report Monitoring of Cardiac Sound, Percutaneous Approach on inpatient claims from October 1, 2025 through September 30, 2026.

What do the characters in 4A123HZ mean?

4A123HZ 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 1 is the Operation (Monitoring); the 4th character 2 is the BodySystem (Cardiac); the 5th character 3 is the Approach (Percutaneous); the 6th character H is the Function/Device (Sound); the 7th character Z is the Qualifier (No Qualifier).

What is the ICD-9-PCS equivalent of 4A123HZ?

Under the General Equivalence Mappings, Monitoring of Cardiac Sound, Percutaneous Approach crosswalks to ICD-9-PCS 89.59. The mapping is approximate, so confirm it fits the documentation.