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ICD-10-PCS 2027 procedure code

079K4ZXDrainage of Thoracic Duct, Percutaneous Endoscopic Approach, Diagnostic

✓ Valid for 2027O.R. procedure

Short description: Drainage of Thoracic Duct, Perc Endo Approach, Diagn

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 079K4ZX

079K4ZX is the ICD-10-PCS code for a drainage procedure on the thoracic duct using a percutaneous endoscopic approach (qualifier: diagnostic). In ICD-10-PCS, drainage means taking or letting out fluids and/or gases from a body part.

In plain terms, this corresponds to biopsy of lymphatic structure, the ICD-9-CM procedure title it maps to (40.11).

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

The same procedure with a different approach is coded 079K0ZX (open), 079K3ZX (percutaneous) and 079K8ZX (via natural or artificial opening endoscopic).

It is an operating-room procedure in the MS-DRG logic for DRG 040 (Peripheral, Cranial Nerve and Other Nervous System Procedures with MCC), DRG 041 (Peripheral, Cranial Nerve and Other Nervous System Procedures with CC or Peripheral Neurostimulator), DRG 042 (Peripheral, Cranial Nerve and Other Nervous System Procedures without CC/MCC), DRG 166 (Other Respiratory System O.R. Procedures with MCC), DRG 167 (Other Respiratory System O.R. Procedures with CC) and DRG 168 (Other Respiratory System O.R. Procedures without CC/MCC), under the surgical categories “Peripheral, Cranial Nerve and Other Nervous System Procedures”, “Other Respiratory System O.R. Procedures”, “Other Circulatory System O.R. Procedures” and 4 more.

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
XDiagnostic

Other versions of this procedure

Different qualifier

MS-DRG v44.0 grouping

All DRGs →

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

MDC 05 · Diseases and Disorders of the Circulatory System · Other Circulatory System O.R. Procedures

ICD-9-CM equivalent

Converter →
  • 40.11Biopsy of lymphatic structureapproximate

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 079K4ZX

Is 079K4ZX a valid ICD-10-PCS code for 2027?

Yes. 079K4ZX is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 079K4ZX an O.R. procedure?

Yes. 079K4ZX is an O.R. procedure in MS-DRG v44.0.

What DRG does 079K4ZX group to?

Depending on the principal diagnosis, 079K4ZX can group to MS-DRG 040, MS-DRG 041, MS-DRG 042, MS-DRG 166, MS-DRG 167 and MS-DRG 168.

What is the ICD-9 procedure code for 079K4ZX?

The CMS GEMs map 079K4ZX to ICD-9-CM 40.11 (Biopsy of lymphatic structure).