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ICD-10-PCS 2027 procedure code

0C540ZZDestruction of Buccal Mucosa, Open Approach

✓ 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 0C540ZZ

0C540ZZ is the ICD-10-PCS code for a destruction procedure on the buccal mucosa using an open approach. In ICD-10-PCS, destruction means physical eradication of all or a portion of a body part by the direct use of energy, force, or a destructive agent.

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 0C500ZZ (upper lip), 0C510ZZ (lower lip), 0C520ZZ (hard palate), 0C530ZZ (soft palate), 0C550ZZ (upper gingiva), 0C560ZZ (lower gingiva) and 18 more.

The same procedure with a different approach is coded 0C543ZZ (percutaneous) and 0C54XZZ (external).

It is an operating-room procedure in the MS-DRG logic for DRG 137 (Mouth Procedures with CC/MCC), DRG 138 (Mouth Procedures without CC/MCC), DRG 907 (Other O.R. Procedures for Injuries with MCC), DRG 908 (Other O.R. Procedures for Injuries with CC), DRG 909 (Other O.R. Procedures for Injuries without CC/MCC) and DRG 957 (Other O.R. Procedures for Multiple Significant Trauma with MCC), under the surgical categories “Mouth Procedures”, “Other O.R. Procedures for Injuries” and “Other O.R. Procedures for Multiple Significant Trauma”.

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
CMouth and Throat
3. Operation
5Destruction

Physical eradication of all or a portion of a body part by the direct use of energy, force, or a destructive agent

None of the body part is physically taken out

Includes: Fulguration of rectal polyp, cautery of skin lesion

4. Body Part
4Buccal Mucosa

Includes: Buccal gland; Molar gland; Palatine gland

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
ZNo Qualifier

Other versions of this procedure

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
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about 0C540ZZ

Is 0C540ZZ a valid ICD-10-PCS code for 2027?

Yes. 0C540ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0C540ZZ an O.R. procedure?

Yes. 0C540ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 0C540ZZ group to?

Depending on the principal diagnosis, 0C540ZZ can group to MS-DRG 137, MS-DRG 138, MS-DRG 907, MS-DRG 908, MS-DRG 909 and MS-DRG 957.

What is the ICD-9 procedure code for 0C540ZZ?

The CMS GEMs map 0C540ZZ to ICD-9-CM 27.49 (Other excision of mouth).