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ICD-10-PCS 2027 procedure code

0WB3XZZExcision of Oral Cavity and Throat, External Approach

✓ Valid for 2027O.R. procedure

Code last changed in FY2018 (effective October 1, 2017). Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data

About 0WB3XZZ

0WB3XZZ is the ICD-10-PCS code for a excision procedure on the oral cavity and throat using an external approach. In ICD-10-PCS, excision means cutting out or off, without replacement, a portion of a body part.

In plain terms, this corresponds to other excision of mouth, the ICD-9-CM procedure title it maps to (27.49).

For a different body part, codes include 0WB0XZZ (head), 0WB2XZZ (face), 0WB4XZZ (upper jaw), 0WB5XZZ (lower jaw), 0WB6XZZ (neck), 0WB8XZZ (chest wall) and 5 more.

The same procedure with a different approach is coded 0WB30ZZ (open), 0WB33ZZ (percutaneous) and 0WB34ZZ (percutaneous endoscopic).

It is an operating-room procedure in the MS-DRG logic for DRG 137 (Mouth Procedures with CC/MCC) and DRG 138 (Mouth Procedures without CC/MCC), under the surgical category “Mouth Procedures”.

It was added in FY2018, effective October 1, 2017.

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
3Oral Cavity and Throat
5. Approach
XExternal

Procedures performed directly on the skin or mucous membrane and procedures performed indirectly by the application of external force through the skin or mucous membrane

6. Device
ZNo Device
7. Qualifier
ZNo Qualifier

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 03 · Diseases and Disorders of the Ear, Nose, Mouth and Throat · Mouth Procedures

ICD-9-CM equivalent

Converter →
  • 27.49Other excision of mouthapproximate

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
  • FY2018 (effective 10/1/2017): Added
  • No changes since FY2018.

Common questions about 0WB3XZZ

Is 0WB3XZZ a valid ICD-10-PCS code for 2027?

Yes. 0WB3XZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0WB3XZZ an O.R. procedure?

Yes. 0WB3XZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 0WB3XZZ group to?

Depending on the principal diagnosis, 0WB3XZZ can group to MS-DRG 137 and MS-DRG 138.

What is the ICD-9 procedure code for 0WB3XZZ?

The CMS GEMs map 0WB3XZZ to ICD-9-CM 27.49 (Other excision of mouth).