ICD-10-PCS Code For Skin And Breast: Procedure Code Group Overview

The International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS) code group 4A1G includes procedures performed to monitor physiological function in the skin and breast. These ICD-10-PCS codes are used for inpatient documentation when clinicians perform repetitive measurements of vascular perfusion in the skin and breast to assess tissue blood flow. Accurate coding within the ICD-10-PCS 4A1G group is essential for proper inpatient reimbursement, as it captures the monitoring performed and supports clinical documentation accuracy.

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Skin And Breast Monitoring Procedure Overview

This procedure group includes monitoring procedures that assess vascular perfusion in the skin and breast using external measurement techniques. The procedures target the physiological systems body system and involve repetitive measurement of perfusion over a period of time. Accurate coding ensures inpatient records reflect the monitoring performed and supports correct case mix and reimbursement.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
4	Section	Measurement and Monitoring
A	Body System	Physiological Systems
1	Operation	Monitoring
G	Body Part	Skin and Breast

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ICD-10-PCS Code For Skin And Breast: Procedure Code Group Overview

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Skin And Breast Monitoring Procedure Overview

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
4	Section	Measurement and Monitoring
A	Body System	Physiological Systems
1	Operation	Monitoring
G	Body Part	Skin and Breast

When to Use

Use a code from this group when repetitive external monitoring is performed to assess skin or breast vascular perfusion, such as during postoperative surveillance or intraoperative assessment. Codes apply when indocyanine green dye or similar agents are used with external measurement techniques to document perfusion changes over a period of time.

ICD-10-PCS Codes

1 rows

ICD-10-PCS Code	Description
4A1GXSH	Monitoring of Skin and Breast Vascular Perfusion using Indocyanine Green Dye, External Approach

Typical Clinical Scenarios

A middle-aged patient is admitted post-mastectomy with immediate implant-based reconstruction who requires intraoperative and early postoperative assessment of flap and surrounding skin perfusion to detect ischemia and guide revision of tissue handling. The surgical and nursing team performs repetitive external monitoring using indocyanine green dye to document skin and breast vascular perfusion during the operation and in the recovery unit to ensure tissue viability. Typical codes: 4A1GXSH
An elderly patient presents emergently with a large, infected breast wound after prior radiation therapy and debridement; during the planned inpatient wound management and reconstructive planning, clinicians perform serial external perfusion measurements with indocyanine green dye to evaluate residual skin and breast tissue blood flow and to determine suitability for closure or flap coverage. The monitoring is performed over several observations to guide operative timing and extent of debridement. Typical codes: 4A1GXSH
A younger patient undergoing elective reduction mammoplasty is monitored intraoperatively and postoperatively using external indocyanine green dye studies to establish baseline and interval skin and breast perfusion measurements because of risk factors (smoking history, obesity) that may compromise healing; repeated monitoring guides immediate intraoperative adjustments and early postoperative management. Typical codes: 4A1GXSH

Related Codes

4A10-CENTRAL-NERVOUS-MONITORING

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

4A11-PERIPHERAL-NERVOUS-MONITORING

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

4A12-CARDIAC-MONITORING

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

4A13-ARTERIAL-MONITORING

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

4A14-VENOUS-MONITORING

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

4A16-LYMPHATIC-MONITORING

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

4A19-RESPIRATORY-MONITORING

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

4A1B-GASTROINTESTINAL-MONITORING

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

4A1D-URINARY-MONITORING

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

4A1H-PRODUCTS-OF-CONCEPTION-MONITORING

ICD-10-PCS Code For Products Of Conception: Procedure Code Group Overview

Showing 1–10 of 12

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

1 rows

ICD-10-PCS Code	Description
4A1GXSH	Monitoring of Skin and Breast Vascular Perfusion using Indocyanine Green Dye, External Approach

Typical Clinical Scenarios

A middle-aged patient is admitted post-mastectomy with immediate implant-based reconstruction who requires intraoperative and early postoperative assessment of flap and surrounding skin perfusion to detect ischemia and guide revision of tissue handling. The surgical and nursing team performs repetitive external monitoring using indocyanine green dye to document skin and breast vascular perfusion during the operation and in the recovery unit to ensure tissue viability. Typical codes: 4A1GXSH
An elderly patient presents emergently with a large, infected breast wound after prior radiation therapy and debridement; during the planned inpatient wound management and reconstructive planning, clinicians perform serial external perfusion measurements with indocyanine green dye to evaluate residual skin and breast tissue blood flow and to determine suitability for closure or flap coverage. The monitoring is performed over several observations to guide operative timing and extent of debridement. Typical codes: 4A1GXSH
A younger patient undergoing elective reduction mammoplasty is monitored intraoperatively and postoperatively using external indocyanine green dye studies to establish baseline and interval skin and breast perfusion measurements because of risk factors (smoking history, obesity) that may compromise healing; repeated monitoring guides immediate intraoperative adjustments and early postoperative management. Typical codes: 4A1GXSH

Related Codes

4A10-CENTRAL-NERVOUS-MONITORING

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

4A11-PERIPHERAL-NERVOUS-MONITORING

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

4A12-CARDIAC-MONITORING

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

4A13-ARTERIAL-MONITORING

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

4A14-VENOUS-MONITORING

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

4A16-LYMPHATIC-MONITORING

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

4A19-RESPIRATORY-MONITORING

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

4A1B-GASTROINTESTINAL-MONITORING

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

4A1D-URINARY-MONITORING

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

4A1H-PRODUCTS-OF-CONCEPTION-MONITORING

ICD-10-PCS Code For Products Of Conception: Procedure Code Group Overview

Showing 1–10 of 12

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 Skin And Breast: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Skin And Breast: Procedure Code Group Overview policy alerts

Skin And Breast Monitoring Procedure Overview

Code Attributes

ICD-10-PCS Code For Skin And Breast: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Skin And Breast: Procedure Code Group Overview policy alerts

Skin And Breast Monitoring Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-PCS code group covers monitoring of skin and breast vascular perfusion?

What specific procedure is included in the 4A1G code group?

In which ICD-10-PCS section and body system is this procedure group located?

Why is accurate coding within the 4A1G group important?

What type of approach is used for the procedure `4A1GXSH`?

References

When to Use

ICD-10-PCS Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-PCS code group covers monitoring of skin and breast vascular perfusion?

What specific procedure is included in the 4A1G code group?

In which ICD-10-PCS section and body system is this procedure group located?

Why is accurate coding within the 4A1G group important?

What type of approach is used for the procedure `4A1GXSH`?

References