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ICD-10-PCS 2027 procedure code

0W9C0ZXDrainage of Mediastinum, Open Approach, Diagnostic

✓ 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 0W9C0ZX

0W9C0ZX is the ICD-10-PCS code for a drainage procedure on the mediastinum using an open 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 open mediastinal biopsy, the ICD-9-CM procedure title it maps to (34.26).

For a different body part, codes include 0W900ZX (head), 0W910ZX (cranial cavity), 0W920ZX (face), 0W930ZX (oral cavity and throat), 0W940ZX (upper jaw), 0W950ZX (lower jaw) and 13 more.

The same procedure with a different approach is coded 0W9C3ZX (percutaneous) and 0W9C4ZX (percutaneous endoscopic).

It is an operating-room procedure in the MS-DRG logic for DRG 166 (Other Respiratory System O.R. Procedures with MCC), DRG 167 (Other Respiratory System O.R. Procedures with CC), DRG 168 (Other Respiratory System O.R. Procedures without CC/MCC), DRG 361 (Other Circulatory System O.R. Procedures with MCC), DRG 362 (Other Circulatory System O.R. Procedures without MCC) and DRG 628 (Other Endocrine, Nutritional and Metabolic O.R. Procedures with MCC or Insertion of Antibiotic-eluting Bone Void Filler), under the surgical categories “Other Respiratory System O.R. Procedures”, “Other Circulatory System O.R. Procedures”, “Other Endocrine, Nutritional and Metabolic O.R. Procedures” and 3 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
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
0Open

Cutting through the skin or mucous membrane and any other body layers necessary to expose 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 →
  • 34.26Open mediastinal biopsyapproximate

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 0W9C0ZX

Is 0W9C0ZX a valid ICD-10-PCS code for 2027?

Yes. 0W9C0ZX is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0W9C0ZX an O.R. procedure?

Yes. 0W9C0ZX is an O.R. procedure in MS-DRG v44.0.

What DRG does 0W9C0ZX group to?

Depending on the principal diagnosis, 0W9C0ZX can group to MS-DRG 166, MS-DRG 167, MS-DRG 168, MS-DRG 361, MS-DRG 362 and MS-DRG 628.

What is the ICD-9 procedure code for 0W9C0ZX?

The CMS GEMs map 0W9C0ZX to ICD-9-CM 34.26 (Open mediastinal biopsy).