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ICD-10-PCS 2027 procedure code

4A0605ZMeasurement of Lymphatic Flow, Open Approach

✓ Valid for 2027O.R. procedure

Code unchanged since ICD-10-PCS took effect on October 1, 2015. Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data

About 4A0605Z

4A0605Z is the ICD-10-PCS code for a measurement procedure on the lymphatic using an open approach with flow. In ICD-10-PCS, measurement means determining the level of a physiological or physical function at a point in time.

In plain terms, this corresponds to other diagnostic procedures on lymphatic structures, the ICD-9-CM procedure title it maps to (40.19).

The same procedure with a different approach is coded 4A0635Z (percutaneous), 4A0675Z (via natural or artificial opening) and 4A0685Z (via natural or artificial opening endoscopic).

With a different device, use 4A060BZ (pressure).

It is an operating-room procedure in the MS-DRG logic for DRG 579 (Other Skin, Subcutaneous Tissue and Breast Procedures with MCC), DRG 580 (Other Skin, Subcutaneous Tissue and Breast Procedures with CC), DRG 581 (Other Skin, Subcutaneous Tissue and Breast Procedures without CC/MCC), DRG 802 (Other O.R. Procedures of the Blood and Blood Forming Organs with MCC), DRG 803 (Other O.R. Procedures of the Blood and Blood Forming Organs with CC) and DRG 804 (Other O.R. Procedures of the Blood and Blood Forming Organs without CC/MCC), under the surgical categories “Other Skin, Subcutaneous Tissue and Breast Procedures” and “Other O.R. Procedures of the Blood and Blood Forming Organs”.

It has been valid since ICD-10-PCS took effect on October 1, 2015.

What each character means

1. Section
4Measurement and Monitoring
2. Body System
APhysiological Systems
3. Operation
0Measurement

Determining the level of a physiological or physical function at a point in time

4. Body System
6Lymphatic
5. Approach
0Open

Cutting through the skin or mucous membrane and any other body layers necessary to expose the site of the procedure

6. Function / Device
5Flow
7. Qualifier
ZNo Qualifier

Other versions of this procedure

Different function / device

MS-DRG v44.0 grouping

All DRGs →

Surgical MS-DRGs this procedure can group to, depending on the principal diagnosis's MDC.

ICD-9-CM equivalent

Converter →
  • 40.19Other diagnostic procedures on lymphatic structuresapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about 4A0605Z

Is 4A0605Z a valid ICD-10-PCS code for 2027?

Yes. 4A0605Z is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 4A0605Z an O.R. procedure?

Yes. 4A0605Z is an O.R. procedure in MS-DRG v44.0.

What DRG does 4A0605Z group to?

Depending on the principal diagnosis, 4A0605Z can group to MS-DRG 579, MS-DRG 580, MS-DRG 581, MS-DRG 802, MS-DRG 803 and MS-DRG 804.

What is the ICD-9 procedure code for 4A0605Z?

The CMS GEMs map 4A0605Z to ICD-9-CM 40.19 (Other diagnostic procedures on lymphatic structures).