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ICD-10-PCS 2027 procedure code

0W9C4ZXDrainage of Mediastinum, Percutaneous Endoscopic Approach, Diagnostic

✓ Valid for 2027

Short description: Drainage of Mediastinum, 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 0W9C4ZX

0W9C4ZX is the ICD-10-PCS code for a drainage procedure on the mediastinum 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 closed [percutaneous] [needle] biopsy of mediastinum, the ICD-9-CM procedure title it maps to (34.25).

For a different body part, codes include 0W904ZX (head), 0W914ZX (cranial cavity), 0W924ZX (face), 0W934ZX (oral cavity and throat), 0W944ZX (upper jaw), 0W954ZX (lower jaw) and 13 more.

The same procedure with a different approach is coded 0W9C0ZX (open) and 0W9C3ZX (percutaneous).

It doesn't appear in the MS-DRG procedure index, so on its own it doesn't change the DRG assignment.

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
WAnatomical Regions, General
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
CMediastinum

Includes: Mediastinal cavity; Mediastinal space

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

ICD-9-CM equivalent

Converter →
  • 34.25Closed [percutaneous] [needle] biopsy of mediastinumapproximate

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 0W9C4ZX

Is 0W9C4ZX a valid ICD-10-PCS code for 2027?

Yes. 0W9C4ZX is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 0W9C4ZX?

The CMS GEMs map 0W9C4ZX to ICD-9-CM 34.25 (Closed [percutaneous] [needle] biopsy of mediastinum).