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ICD-10-PCS 2027 procedure code

0CX4XZZTransfer Buccal Mucosa, External 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 0CX4XZZ

0CX4XZZ is the ICD-10-PCS code for a transfer procedure on the buccal mucosa using an external approach. In ICD-10-PCS, transfer means moving, without taking out, all or a portion of a body part to another location to take over the function of all or a portion of a body part.

In plain terms, this corresponds to attachment of pedicle or flap graft to lip and mouth, the ICD-9-CM procedure title it maps to (27.57).

For a different body part, codes include 0CX0XZZ (upper lip), 0CX1XZZ (lower lip), 0CX3XZZ (soft palate), 0CX5XZZ (upper gingiva), 0CX6XZZ (lower gingiva) and 0CX7XZZ (tongue).

The same procedure with a different approach is coded 0CX40ZZ (open).

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
XTransfer

Moving, without taking out, all or a portion of a body part to another location to take over the function of all or a portion of a body part

The body part transferred remains connected to its vascular and nervous supply

Includes: Tendon transfer, skin pedicle flap transfer

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

Different approach

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 →
  • 27.57Attachment of pedicle or flap graft to lip and 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 0CX4XZZ

Is 0CX4XZZ a valid ICD-10-PCS code for 2027?

Yes. 0CX4XZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.

Is 0CX4XZZ an O.R. procedure?

Yes. 0CX4XZZ is an O.R. procedure in MS-DRG v44.0.

What DRG does 0CX4XZZ group to?

Depending on the principal diagnosis, 0CX4XZZ 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 0CX4XZZ?

The CMS GEMs map 0CX4XZZ to ICD-9-CM 27.57 (Attachment of pedicle or flap graft to lip and mouth).