ICD-10-PCS Code For Buccal Mucosa: Procedure Code Group Overview

The International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS) code group 0CB4 includes procedures performed to excise tissue in the buccal mucosa. These ICD-10-PCS codes are used for inpatient documentation when a portion of the buccal mucosa is surgically removed without replacement for diagnostic or therapeutic reasons. Accurate coding within the ICD-10-PCS 0CB4 group is essential for proper inpatient reimbursement, as it captures the procedure performed and the precise anatomical site.

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Buccal Mucosa Excision Procedure Overview

This procedure group includes excisions of tissue from the buccal mucosa and targets the mouth and throat body system. These are cutting-out procedures that remove a portion of the buccal mucosa without replacement. Accurate ICD-10-PCS coding for these excisions is important for correct inpatient documentation and appropriate reimbursement because it captures the specific operation and anatomical site.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
0	Section	Medical and Surgical
C	Body System	Mouth and Throat
B	Operation	Excision
4	Body Part	Buccal Mucosa

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ICD-10-PCS Code For Buccal Mucosa: Procedure Code Group Overview

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Buccal Mucosa Excision Procedure Overview

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
0	Section	Medical and Surgical
C	Body System	Mouth and Throat
B	Operation	Excision
4	Body Part	Buccal Mucosa

When to Use

Use a code from this group when a surgical excision removes part of the buccal mucosa during an inpatient stay for diagnostic or therapeutic purposes. Codes apply when tissue is excised and not replaced, such as removal of lesions, biopsies larger than simple transoral biopsies, or debridement of diseased mucosa.

ICD-10-PCS Codes

6 rows

ICD-10-PCS Code	Description
0CB40ZX	Excision of Buccal Mucosa, Open Approach, Diagnostic
0CB40ZZ	Excision of Buccal Mucosa, Open Approach
0CB43ZX	Excision of Buccal Mucosa, Percutaneous Approach, Diagnostic
0CB43ZZ	Excision of Buccal Mucosa, Percutaneous Approach
0CB4XZX	Excision of Buccal Mucosa, External Approach, Diagnostic
0CB4XZZ	Excision of Buccal Mucosa, External Approach

DRG Codes

11 rows

DRG Code	Description
137	Mouth Procedures with CC/MCC
138	Mouth Procedures without CC/MCC
907	Other O.R. Procedures for Injuries with MCC
908	Other O.R. Procedures for Injuries with CC
909	Other O.R. Procedures for Injuries without CC/MCC
957	Other O.R. Procedures for Multiple Significant Trauma with MCC
958	Other O.R. Procedures for Multiple Significant Trauma with CC
959	Other O.R. Procedures for Multiple Significant Trauma without CC/MCC
987	Non-Extensive O.R. Procedures Unrelated to Principal Diagnosis with MCC
988	Non-Extensive O.R. Procedures Unrelated to Principal Diagnosis with CC

Showing 1–10 of 11

Typical Clinical Scenarios

An adult patient is admitted urgently with a rapidly enlarging, painful buccal mucosal mass suspicious for malignancy after an outpatient biopsy was inconclusive. During the inpatient workup the surgical team performs an open excisional biopsy of the lesion to obtain a definitive diagnostic specimen and control local symptoms. The procedure removes a portion of buccal mucosa without replacement to establish histopathologic diagnosis. Typical codes: 0CB40ZX
A middle-aged patient undergoes a planned inpatient procedure for removal of a symptomatic, nonhealing leukoplakic patch of the buccal mucosa that has failed conservative therapy. The surgeon performs an open excision of the abnormal mucosa to remove the lesion entirely for therapeutic purposes and for definitive pathology. Tissue is excised and not replaced. Typical codes: 0CB40ZZ
An elderly patient with chronic radiation-induced ulceration and necrosis of the buccal mucosa is admitted for debridement after progressive pain, infection, and failure of conservative wound care. The team performs a percutaneous excision of the diseased mucosal portion to remove devitalized tissue and control infection during the inpatient stay, without immediate tissue replacement. Typical codes: 0CB43ZZ

Related Codes

0CB0-UPPER-LIP-EXCISION

ICD-10-PCS Code For Upper Lip: Procedure Code Group Overview

0CB1-LOWER-LIP-EXCISION

ICD-10-PCS Code For Lower Lip: Procedure Code Group Overview

0CB2-HARD-PALATE-EXCISION

ICD-10-PCS Code For Hard Palate: Procedure Code Group Overview

0CB3-SOFT-PALATE-EXCISION

ICD-10-PCS Code For Soft Palate: Procedure Code Group Overview

0CB5-UPPER-GINGIVA-EXCISION

ICD-10-PCS Code For Upper Gingiva: Procedure Code Group Overview

0CB6-LOWER-GINGIVA-EXCISION

ICD-10-PCS Code For Lower Gingiva: Procedure Code Group Overview

0CB7-TONGUE-EXCISION

ICD-10-PCS Code For Tongue: Procedure Code Group Overview

0CB8-PAROTID-GLAND-EXCISION

ICD-10-PCS Code For Parotid Gland, Right: Procedure Code Group Overview

0CB9-PAROTID-GLAND-LEFT-EXCISION

ICD-10-PCS Code for Parotid Gland, Left: Procedure Code Group Overview

0CBB-PAROTID-DUCT-RIGHT-EXCISION

ICD-10-PCS Code For Parotid Duct, Right: Procedure Code Group Overview

Showing 1–10 of 26

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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When to Use

ICD-10-PCS Codes

6 rows

ICD-10-PCS Code	Description
0CB40ZX	Excision of Buccal Mucosa, Open Approach, Diagnostic
0CB40ZZ	Excision of Buccal Mucosa, Open Approach
0CB43ZX	Excision of Buccal Mucosa, Percutaneous Approach, Diagnostic
0CB43ZZ	Excision of Buccal Mucosa, Percutaneous Approach
0CB4XZX	Excision of Buccal Mucosa, External Approach, Diagnostic
0CB4XZZ	Excision of Buccal Mucosa, External Approach

DRG Codes

11 rows

DRG Code	Description
137	Mouth Procedures with CC/MCC
138	Mouth Procedures without CC/MCC
907	Other O.R. Procedures for Injuries with MCC
908	Other O.R. Procedures for Injuries with CC
909	Other O.R. Procedures for Injuries without CC/MCC
957	Other O.R. Procedures for Multiple Significant Trauma with MCC
958	Other O.R. Procedures for Multiple Significant Trauma with CC
959	Other O.R. Procedures for Multiple Significant Trauma without CC/MCC
987	Non-Extensive O.R. Procedures Unrelated to Principal Diagnosis with MCC
988	Non-Extensive O.R. Procedures Unrelated to Principal Diagnosis with CC

Showing 1–10 of 11

Typical Clinical Scenarios

An adult patient is admitted urgently with a rapidly enlarging, painful buccal mucosal mass suspicious for malignancy after an outpatient biopsy was inconclusive. During the inpatient workup the surgical team performs an open excisional biopsy of the lesion to obtain a definitive diagnostic specimen and control local symptoms. The procedure removes a portion of buccal mucosa without replacement to establish histopathologic diagnosis. Typical codes: 0CB40ZX
A middle-aged patient undergoes a planned inpatient procedure for removal of a symptomatic, nonhealing leukoplakic patch of the buccal mucosa that has failed conservative therapy. The surgeon performs an open excision of the abnormal mucosa to remove the lesion entirely for therapeutic purposes and for definitive pathology. Tissue is excised and not replaced. Typical codes: 0CB40ZZ
An elderly patient with chronic radiation-induced ulceration and necrosis of the buccal mucosa is admitted for debridement after progressive pain, infection, and failure of conservative wound care. The team performs a percutaneous excision of the diseased mucosal portion to remove devitalized tissue and control infection during the inpatient stay, without immediate tissue replacement. Typical codes: 0CB43ZZ

Related Codes

0CB0-UPPER-LIP-EXCISION

ICD-10-PCS Code For Upper Lip: Procedure Code Group Overview

0CB1-LOWER-LIP-EXCISION

ICD-10-PCS Code For Lower Lip: Procedure Code Group Overview

0CB2-HARD-PALATE-EXCISION

ICD-10-PCS Code For Hard Palate: Procedure Code Group Overview

0CB3-SOFT-PALATE-EXCISION

ICD-10-PCS Code For Soft Palate: Procedure Code Group Overview

0CB5-UPPER-GINGIVA-EXCISION

ICD-10-PCS Code For Upper Gingiva: Procedure Code Group Overview

0CB6-LOWER-GINGIVA-EXCISION

ICD-10-PCS Code For Lower Gingiva: Procedure Code Group Overview

0CB7-TONGUE-EXCISION

ICD-10-PCS Code For Tongue: Procedure Code Group Overview

0CB8-PAROTID-GLAND-EXCISION

ICD-10-PCS Code For Parotid Gland, Right: Procedure Code Group Overview

0CB9-PAROTID-GLAND-LEFT-EXCISION

ICD-10-PCS Code for Parotid Gland, Left: Procedure Code Group Overview

0CBB-PAROTID-DUCT-RIGHT-EXCISION

ICD-10-PCS Code For Parotid Duct, Right: Procedure Code Group Overview

Showing 1–10 of 26

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

ICD-10-PCS Code For Buccal Mucosa: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Buccal Mucosa: Procedure Code Group Overview policy alerts

Buccal Mucosa Excision Procedure Overview

Code Attributes

ICD-10-PCS Code For Buccal Mucosa: Procedure Code Group Overview

Sign up for ICD-10-PCS Code For Buccal Mucosa: Procedure Code Group Overview policy alerts

Buccal Mucosa Excision Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-PCS codes are included in the Buccal Mucosa excision group 0CB4?

What body system and operation does ICD-10-PCS group 0CB4 represent?

For what inpatient documentation purposes is accurate coding in 0CB4 required?

Which DRG categories may be associated with procedures coded in the 0CB4 group?

What are the approach distinctions represented within the individual codes in this group?

References

When to Use

ICD-10-PCS Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-PCS codes are included in the Buccal Mucosa excision group 0CB4?

What body system and operation does ICD-10-PCS group 0CB4 represent?

For what inpatient documentation purposes is accurate coding in 0CB4 required?

Which DRG categories may be associated with procedures coded in the 0CB4 group?

What are the approach distinctions represented within the individual codes in this group?

References