ICD-10-PCS 2027 procedure code
0CB4XZXExcision of Buccal Mucosa, External Approach, Diagnostic
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 0CB4XZX
0CB4XZX is the ICD-10-PCS code for a excision procedure on the buccal mucosa using an external approach (qualifier: diagnostic). In ICD-10-PCS, excision means cutting out or off, without replacement, a portion of a body part.
In plain terms, this corresponds to biopsy of mouth, unspecified structure, the ICD-9-CM procedure title it maps to (27.24).
For a different body part, codes include 0CB0XZX (upper lip), 0CB1XZX (lower lip), 0CB2XZX (hard palate), 0CB3XZX (soft palate), 0CB5XZX (upper gingiva), 0CB6XZX (lower gingiva) and 4 more.
The same procedure with a different approach is coded 0CB40ZX (open) and 0CB43ZX (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
- 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
- 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
- XDiagnostic
Other versions of this procedure
Different body part
Different approach
Different qualifier
ICD-9-CM equivalent
Converter →- 27.24Biopsy of mouth, unspecified structureapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about 0CB4XZX
Is 0CB4XZX a valid ICD-10-PCS code for 2027?
- Yes. 0CB4XZX is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
What is the ICD-9 procedure code for 0CB4XZX?
- The CMS GEMs map 0CB4XZX to ICD-9-CM 27.24 (Biopsy of mouth, unspecified structure).