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ICD-10-PCS 2027 procedure code

079K4ZZDrainage of Thoracic Duct, Percutaneous Endoscopic 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 079K4ZZ

079K4ZZ is the ICD-10-PCS code for a drainage procedure on the thoracic duct using a percutaneous endoscopic approach. In ICD-10-PCS, drainage means taking or letting out fluids and/or gases from a body part.

In plain terms, this corresponds to fistulization of thoracic duct, the ICD-9-CM procedure title it maps to (40.62).

For a different body part, codes include 07904ZZ (lymphatic, head), 07914ZZ (lymphatic, right neck), 07924ZZ (lymphatic, left neck), 07934ZZ (lymphatic, right upper extremity), 07944ZZ (lymphatic, left upper extremity), 07954ZZ (lymphatic, right axillary) and 15 more.

The same procedure with a different approach is coded 079K0ZZ (open), 079K3ZZ (percutaneous) and 079K8ZZ (via natural or artificial opening endoscopic).

With a different device, use 079K40Z (drainage device).

It is an operating-room procedure in the MS-DRG logic for DRG 163 (Major Chest Procedures with MCC), DRG 164 (Major Chest Procedures with CC), DRG 165 (Major Chest Procedures without CC/MCC), DRG 907 (Other O.R. Procedures for Injuries with MCC), DRG 908 (Other O.R. Procedures for Injuries with CC) and DRG 909 (Other O.R. Procedures for Injuries without CC/MCC), under the surgical categories “Major Chest Procedures”, “Other O.R. Procedures for Injuries” and “Other O.R. Procedures for Multiple Significant Trauma”.

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

What each character means

1. Section
0Medical and Surgical
2. Body System
7Lymphatic and Hemic Systems
3. Operation
9Drainage

Taking or letting out fluids and/or gases from a body part

The qualifier DIAGNOSTIC is used to identify drainage procedures that are biopsies

Includes: Thoracentesis, incision and drainage

4. Body Part
KThoracic Duct

Includes: Left jugular trunk; Left subclavian trunk

5. Approach
4Percutaneous Endoscopic

Entry, by puncture or minor incision, of instrumentation through the skin or mucous membrane and any other body layers necessary to reach and visualize the site of the procedure

6. Device
ZNo Device
7. Qualifier
ZNo Qualifier

Other versions of this procedure

Different device

Different qualifier

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 →
  • 40.62Fistulization of thoracic ductapproximate

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 079K4ZZ

Is 079K4ZZ a valid ICD-10-PCS code for 2027?

Yes. 079K4ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 079K4ZZ an O.R. procedure?

Yes. 079K4ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 079K4ZZ group to?

Depending on the principal diagnosis, 079K4ZZ can group to MS-DRG 163, MS-DRG 164, MS-DRG 165, MS-DRG 907, MS-DRG 908 and MS-DRG 909.

What is the ICD-9 procedure code for 079K4ZZ?

The CMS GEMs map 079K4ZZ to ICD-9-CM 40.62 (Fistulization of thoracic duct).