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ICD-10-PCS 2027 procedure code

0WBC4ZXExcision of Mediastinum, Percutaneous Endoscopic Approach, Diagnostic

✓ Valid for 2027O.R. procedure

Short description: Excision 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 0WBC4ZX

0WBC4ZX is the ICD-10-PCS code for a excision procedure on the mediastinum using a percutaneous endoscopic approach (qualifier: diagnostic). In ICD-10-PCS, excision means cutting out or off, without replacement, a portion of 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 0WB04ZX (head), 0WB24ZX (face), 0WB34ZX (oral cavity and throat), 0WB44ZX (upper jaw), 0WB54ZX (lower jaw), 0WB64ZX (neck) and 7 more.

The same procedure with a different approach is coded 0WBC0ZX (open) and 0WBC3ZX (percutaneous).

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 628 (Other Endocrine, Nutritional and Metabolic O.R. Procedures with MCC or Insertion of Antibiotic-eluting Bone Void Filler), DRG 629 (Other Endocrine, Nutritional and Metabolic O.R. Procedures with CC) and DRG 630 (Other Endocrine, Nutritional and Metabolic O.R. Procedures without CC/MCC), under the surgical categories “Other Respiratory System O.R. Procedures”, “Other Endocrine, Nutritional and Metabolic O.R. Procedures”, “Lymphoma and Leukemia with Major O.R. Procedures” and 1 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
BExcision

Cutting out or off, without replacement, a portion of a body part

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

Includes: Partial nephrectomy, liver biopsy

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

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 →
  • 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 0WBC4ZX

Is 0WBC4ZX a valid ICD-10-PCS code for 2027?

Yes. 0WBC4ZX is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0WBC4ZX an O.R. procedure?

Yes. 0WBC4ZX is an O.R. procedure in MS-DRG v44.0.

What DRG does 0WBC4ZX group to?

Depending on the principal diagnosis, 0WBC4ZX can group to MS-DRG 166, MS-DRG 167, MS-DRG 168, MS-DRG 628, MS-DRG 629 and MS-DRG 630.

What is the ICD-9 procedure code for 0WBC4ZX?

The CMS GEMs map 0WBC4ZX to ICD-9-CM 34.25 (Closed [percutaneous] [needle] biopsy of mediastinum).