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ICD-10-PCS 2027 procedure code

0CQ4XZZRepair Buccal Mucosa, External Approach

✓ Valid for 2027

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 0CQ4XZZ

0CQ4XZZ is the ICD-10-PCS code for a repair procedure on the buccal mucosa using an external approach. In ICD-10-PCS, repair means restoring, to the extent possible, a body part to its normal anatomic structure and function.

In plain terms, this corresponds to other plastic repair of mouth, the ICD-9-CM procedure title it maps to (27.59).

For a different body part, codes include 0CQ0XZZ (upper lip), 0CQ1XZZ (lower lip), 0CQ2XZZ (hard palate), 0CQ3XZZ (soft palate), 0CQ5XZZ (upper gingiva), 0CQ6XZZ (lower gingiva) and 4 more.

The same procedure with a different approach is coded 0CQ40ZZ (open) and 0CQ43ZZ (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
CMouth and Throat
3. Operation
QRepair

Restoring, to the extent possible, a body part to its normal anatomic structure and function

Used only when the method to accomplish the repair is not one of the other root operations

Includes: Colostomy takedown, suture of laceration

4. Body Part
4Buccal Mucosa

Includes: Buccal gland; Molar gland; Palatine gland

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

ICD-9-CM equivalent

Converter →
  • 27.59Other plastic repair 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 0CQ4XZZ

Is 0CQ4XZZ a valid ICD-10-PCS code for 2027?

Yes. 0CQ4XZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

What is the ICD-9 procedure code for 0CQ4XZZ?

The CMS GEMs map 0CQ4XZZ to ICD-9-CM 27.59 (Other plastic repair of mouth).