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 0CU4 includes procedures performed to supplement biological or synthetic material in the buccal mucosa. These ICD-10-PCS codes are used for inpatient documentation when material is placed in or on the buccal mucosa to reinforce or augment tissue function. Accurate coding within the ICD-10-PCS 0CU4 group is essential for proper inpatient reimbursement, as it captures the procedure performed and determines appropriate case mix and payment.

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Buccal Mucosa Supplement Procedure Overview

Procedures in this ICD-10-PCS group involve placing biological or synthetic material on or into the buccal mucosa to reinforce or augment tissue function within the mouth and throat system. These supplement procedures support structural integrity or restore function of the buccal mucosa. Accurate coding of these procedures is important for inpatient reimbursement because it captures the specific augmentation performed and supports appropriate case mix assignment.

Code Attributes

Character	ICD-10-PCS Category	Code Group Details
0	Section	Medical and Surgical
C	Body System	Mouth and Throat
U	Operation	Supplement
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 Supplement Procedure Overview

Code Attributes

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

When to Use

Use a code from this group when material is intentionally placed on or into the buccal mucosa to restore, reinforce, or augment its function during an inpatient encounter. These codes apply regardless of the specific material used when the primary intent is supplementation of the buccal mucosa.

ICD-10-PCS Codes

9 rows

ICD-10-PCS Code	Description
0CU407Z	Supplement Buccal Mucosa with Autologous Tissue Substitute, Open Approach
0CU40JZ	Supplement Buccal Mucosa with Synthetic Substitute, Open Approach
0CU40KZ	Supplement Buccal Mucosa with Nonautologous Tissue Substitute, Open Approach
0CU437Z	Supplement Buccal Mucosa with Autologous Tissue Substitute, Percutaneous Approach
0CU43JZ	Supplement Buccal Mucosa with Synthetic Substitute, Percutaneous Approach
0CU43KZ	Supplement Buccal Mucosa with Nonautologous Tissue Substitute, Percutaneous Approach
0CU4X7Z	Supplement Buccal Mucosa with Autologous Tissue Substitute, External Approach
0CU4XJZ	Supplement Buccal Mucosa with Synthetic Substitute, External Approach
0CU4XKZ	Supplement Buccal Mucosa with Nonautologous Tissue Substitute, External Approach

DRG Codes

14 rows

DRG Code	Description
137	Mouth Procedures with CC/MCC
138	Mouth Procedures without CC/MCC
579	Other Skin, Subcutaneous Tissue and Breast Procedures with MCC
580	Other Skin, Subcutaneous Tissue and Breast Procedures with CC
581	Other Skin, Subcutaneous Tissue and Breast 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

Showing 1–10 of 14

Typical Clinical Scenarios

A middle-aged patient with extensive buccal mucosa deficit after surgical excision of an invasive squamous cell carcinoma presents for planned inpatient reconstruction to restore intraoral lining and support mastication; the surgeon places a graft of the patient’s own buccal fat or nearby mucosal tissue onto the defect through an open intraoral approach to augment and reinforce the mucosal surface. Typical codes: 0CU407Z
An elderly patient on anticoagulation develops a nonhealing buccal mucosa ulcer with tissue loss and recurrent bleeding, requiring urgent inpatient debridement and placement of a synthetic patch applied percutaneously to stabilize the mucosal surface and control bleeding while promoting healing. Typical codes: 0CU43JZ
A younger patient returns to the hospital with breakdown of a prior allograft used to repair a traumatic buccal mucosa injury; during an inpatient revision procedure the surgeon removes the failed graft and applies a new nonautologous tissue substitute externally to augment the mucosa and restore function. Typical codes: 0CU4XKZ

Related Codes

0CU0-UPPER-LIP-SUPPLEMENT

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

0CU1-LOWER-LIP-SUPPLEMENT

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

0CU2-HARD-PALATE-SUPPLEMENT

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

0CU3-SOFT-PALATE-SUPPLEMENT

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

0CU5-UPPER-GINGIVA-SUPPLEMENT

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

0CU6-LOWER-GINGIVA-SUPPLEMENT

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

0CU7-TONGUE-SUPPLEMENT

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

0CUM-PHARYNX-PUTTING-IN-OR-ON-PHARYNX-SUPPLEMENT

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

0CUN-UVULA-SUPPLEMENT

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

0CUR-EPIGLOTTIS-SUPPLEMENT

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

Showing 1–10 of 13

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

9 rows

ICD-10-PCS Code	Description
0CU407Z	Supplement Buccal Mucosa with Autologous Tissue Substitute, Open Approach
0CU40JZ	Supplement Buccal Mucosa with Synthetic Substitute, Open Approach
0CU40KZ	Supplement Buccal Mucosa with Nonautologous Tissue Substitute, Open Approach
0CU437Z	Supplement Buccal Mucosa with Autologous Tissue Substitute, Percutaneous Approach
0CU43JZ	Supplement Buccal Mucosa with Synthetic Substitute, Percutaneous Approach
0CU43KZ	Supplement Buccal Mucosa with Nonautologous Tissue Substitute, Percutaneous Approach
0CU4X7Z	Supplement Buccal Mucosa with Autologous Tissue Substitute, External Approach
0CU4XJZ	Supplement Buccal Mucosa with Synthetic Substitute, External Approach
0CU4XKZ	Supplement Buccal Mucosa with Nonautologous Tissue Substitute, External Approach

DRG Codes

14 rows

DRG Code	Description
137	Mouth Procedures with CC/MCC
138	Mouth Procedures without CC/MCC
579	Other Skin, Subcutaneous Tissue and Breast Procedures with MCC
580	Other Skin, Subcutaneous Tissue and Breast Procedures with CC
581	Other Skin, Subcutaneous Tissue and Breast 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

Showing 1–10 of 14

Typical Clinical Scenarios

A middle-aged patient with extensive buccal mucosa deficit after surgical excision of an invasive squamous cell carcinoma presents for planned inpatient reconstruction to restore intraoral lining and support mastication; the surgeon places a graft of the patient’s own buccal fat or nearby mucosal tissue onto the defect through an open intraoral approach to augment and reinforce the mucosal surface. Typical codes: 0CU407Z
An elderly patient on anticoagulation develops a nonhealing buccal mucosa ulcer with tissue loss and recurrent bleeding, requiring urgent inpatient debridement and placement of a synthetic patch applied percutaneously to stabilize the mucosal surface and control bleeding while promoting healing. Typical codes: 0CU43JZ
A younger patient returns to the hospital with breakdown of a prior allograft used to repair a traumatic buccal mucosa injury; during an inpatient revision procedure the surgeon removes the failed graft and applies a new nonautologous tissue substitute externally to augment the mucosa and restore function. Typical codes: 0CU4XKZ

Related Codes

0CU0-UPPER-LIP-SUPPLEMENT

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

0CU1-LOWER-LIP-SUPPLEMENT

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

0CU2-HARD-PALATE-SUPPLEMENT

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

0CU3-SOFT-PALATE-SUPPLEMENT

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

0CU5-UPPER-GINGIVA-SUPPLEMENT

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

0CU6-LOWER-GINGIVA-SUPPLEMENT

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

0CU7-TONGUE-SUPPLEMENT

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

0CUM-PHARYNX-PUTTING-IN-OR-ON-PHARYNX-SUPPLEMENT

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

0CUN-UVULA-SUPPLEMENT

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

0CUR-EPIGLOTTIS-SUPPLEMENT

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

Showing 1–10 of 13

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 Supplement 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 Supplement Procedure Overview

Code Attributes

When to Use

ICD-10-PCS Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-PCS code group covers buccal mucosa supplement procedures?

What body system and operation are represented by code group 0CU4?

Which specific codes in 0CU4 indicate the use of synthetic versus autologous substitutes?

How does approach type factor into the 0CU4 codes?

What is the reimbursement relevance of accurately coding procedures in the 0CU4 group?

References

When to Use

ICD-10-PCS Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

Which ICD-10-PCS code group covers buccal mucosa supplement procedures?

What body system and operation are represented by code group 0CU4?

Which specific codes in 0CU4 indicate the use of synthetic versus autologous substitutes?

How does approach type factor into the 0CU4 codes?

What is the reimbursement relevance of accurately coding procedures in the 0CU4 group?

References