4A1GXSHMonitoring of Skin and Breast Vascular Perfusion using Indocyanine Green Dye, External Approach

Measurement and Monitoring›Physiological Systems›Monitoring
  • Billable / Specific Code
ICD-10-PCS 4A1GXSH
CMS Source: FY 2027 ICD-10-PCS dataset. Effective Oct 1, 2026 – Sep 30, 2027.FacebookXLinkedInPrint

4A1GXSH is a billable ICD-10-PCS procedure code for Monitoring of Skin and Breast Vascular Perfusion using Indocyanine Green Dye, External Approach. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027). The root operation Monitoring involves determining the level of a physiological or physical function repetitively over a period of time. In AHRQ's Clinical Classifications Software (CCSR), this procedure falls under Measurement and monitoring, NEC.

Code Identity

ICD-10-PCS Code
4A1GXSH
Billable Status
Yes — Valid for Submission
Code Describes
Monitoring of Skin and Breast Vascular Perfusion using Indocyanine Green Dye, External Approach
Short Description
Monitor Skin/Breast Vasc Perfus, ICG dye, Extern
Parent Code
4A1

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
4BodySystemGSkin and Breast
5ApproachXExternal
6Function/DeviceSVascular Perfusion
7QualifierHIndocyanine Green Dye

In the ICD-10-PCS Alphabetic Index

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

Monitoring, Skin and Breast, Vascular Perfusion, Indocyanine Green Dye
Direct entry for this code
SPY PINPOINT fluorescence imaging system
Leads to this code's table
Intravascular fluorescence angiography (IFA)
Leads to this code's table
SPY system intravascular fluorescence angiography
Leads to this code's table
Testing, Neurophysiologic monitoring, intra-operative
Leads to this code's table
Angiocardiography, SPY system intravascular fluorescence
Leads to this code's table
Assessment, Intravascular perfusion, using indocyanine green (ICG) dye
Leads to this code's table

To code testing of the intra-operative neurophysiologic monitoring, open the FY 2027 ICD-10-PCS Alphabetic Index at Testing, then the subterms Neurophysiologic monitoring, intra-operative. The index leads to table 4A1, where the approach, Function/Device and qualifier values shown in the breakdown above complete the seven-character code 4A1GXSH.

Browse the full ICD-10-PCS Alphabetic Index →

Clinical Classification (CCSR)

AHRQ groups this procedure code into these clinical categories.

MAM015
Measurement and monitoring, NEC
Clinical domain: Measurement and Monitoring

Code History

Replaces previously assigned code(s):
  • 3E033KZ — Introduce of Oth Diagn Subst into Periph Vein, Perc Approach
  • 3E043KZ — Introduce Oth Diagn Subst in Central Vein, Perc

Questions About 4A1GXSH

Is 4A1GXSH a billable code?

Yes. This is a complete seven-character ICD-10-PCS code, specific enough to report Monitoring of Skin and Breast Vascular Perfusion using Indocyanine Green Dye, External Approach on inpatient claims from October 1, 2026 through September 30, 2027.

What do the characters in 4A1GXSH 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 1 is the Operation (Monitoring); the 4th character G is the BodySystem (Skin and Breast); the 5th character X is the Approach (External); the 6th character S is the Function/Device (Vascular Perfusion); the 7th character H is the Qualifier (Indocyanine Green Dye).