4A1635HMonitoring of Lymphatic Flow using Indocyanine Green Dye, Percutaneous Approach

Measurement and Monitoring›Physiological Systems›Monitoring
  • Billable / Specific Code
ICD-10-PCS 4A1635H
CMS Source: FY 2026 ICD-10-PCS dataset. Effective Oct 1, 2025 – Sep 30, 2026.FacebookXLinkedInPrint

4A1635H is a billable ICD-10-PCS procedure code for Monitoring of Lymphatic Flow using Indocyanine Green Dye, 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
4A1635H
Billable Status
Yes — Valid for Submission
Code Describes
Monitoring of Lymphatic Flow using Indocyanine Green Dye, Percutaneous Approach
Parent Code
4A1
Short Description
Monitoring of Lymphatic Flow using ICG dye, Perc 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
4BodySystem6Lymphatic
5Approach3Percutaneous
6Function/Device5Flow
7QualifierHIndocyanine Green Dye

Code History

Replaces previously assigned code(s):
  • 4A1635Z — Monitoring of Lymphatic Flow, Percutaneous Approach

Similar Procedure Codes

Questions About 4A1635H

Is 4A1635H a billable code?

Yes. 4A1635H is a complete seven-character ICD-10-PCS code, specific enough to report Monitoring of Lymphatic Flow using Indocyanine Green Dye, Percutaneous Approach on inpatient claims from October 1, 2025 through September 30, 2026.

What do the characters in 4A1635H mean?

4A1635H 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 6 is the BodySystem (Lymphatic); the 5th character 3 is the Approach (Percutaneous); the 6th character 5 is the Function/Device (Flow); the 7th character H is the Qualifier (Indocyanine Green Dye).