Skip to content
Dx

ICD-10-PCS 2027 procedure code

0CQ40ZZRepair 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 0CQ40ZZ

0CQ40ZZ is the ICD-10-PCS code for a repair procedure on the buccal mucosa using an open 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 0CQ00ZZ (upper lip), 0CQ10ZZ (lower lip), 0CQ20ZZ (hard palate), 0CQ30ZZ (soft palate), 0CQ50ZZ (upper gingiva), 0CQ60ZZ (lower gingiva) and 18 more.

The same procedure with a different approach is coded 0CQ43ZZ (percutaneous) and 0CQ4XZZ (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 579 (Other Skin, Subcutaneous Tissue and Breast Procedures with MCC), DRG 580 (Other Skin, Subcutaneous Tissue and Breast Procedures with CC), DRG 581 (Other Skin, Subcutaneous Tissue and Breast Procedures without CC/MCC) and DRG 907 (Other O.R. Procedures for Injuries with MCC), under the surgical categories “Mouth Procedures”, “Other Skin, Subcutaneous Tissue and Breast Procedures”, “Other O.R. Procedures for Injuries” 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
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
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 →
  • 27.59Other 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 0CQ40ZZ

Is 0CQ40ZZ a valid ICD-10-PCS code for 2027?

Yes. 0CQ40ZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0CQ40ZZ an O.R. procedure?

Yes. 0CQ40ZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 0CQ40ZZ group to?

Depending on the principal diagnosis, 0CQ40ZZ can group to MS-DRG 137, MS-DRG 138, MS-DRG 579, MS-DRG 580, MS-DRG 581 and MS-DRG 907.

What is the ICD-9 procedure code for 0CQ40ZZ?

The CMS GEMs map 0CQ40ZZ to ICD-9-CM 27.59 (Other plastic repair of mouth).