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 0CX4 includes procedures performed to transfer tissue or structures in the buccal mucosa. These ICD-10-PCS codes are used for inpatient documentation when part or all of the buccal mucosa is moved, without removal, to assume the function of another anatomical site. Accurate coding within the ICD-10-PCS 0CX4 group is essential for proper inpatient reimbursement, as it captures the specific transfer procedure performed and supports clinical documentation accuracy.

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Buccal Mucosa Transfer Procedure Overview

This procedure group covers transfer operations involving the buccal mucosa within the Mouth and Throat body system. Procedures in this group move, without taking out, all or a portion of the buccal mucosa to another location to take over the function of all or part of a body part. Accurate ICD-10-PCS coding for these transfers supports correct inpatient reimbursement and reflects the clinical intent and complexity of the procedure.

Code Attributes

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

Code Attributes

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

When to Use

Use a code from this group when the buccal mucosa is transferred in situ to take over the function of all or part of another body part. These codes apply when tissue is moved without excision and the clinical intent is functional replacement or augmentation.

ICD-10-PCS Codes

2 rows

ICD-10-PCS Code	Description
0CX40ZZ	Transfer Buccal Mucosa, Open Approach
0CX4XZZ	Transfer Buccal Mucosa, 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 45-year-old man presents for a planned reconstructive procedure after resection of a small oral cavity tumor, leaving a mucosal defect of the cheek. Intraoperatively the surgeon mobilizes a segment of ipsilateral buccal mucosa and transfers it to the defect to restore lining and function without removing the tissue. An open approach is used when the mucosal flap is elevated and repositioned to cover the surgical defect. Typical codes: 0CX40ZZ
A 32-year-old woman is admitted urgently after a facial dog-bite causing loss of buccal mucosal continuity and exposure of deeper tissues. To repair the defect and restore oral competence, the surgeon mobilizes adjacent buccal mucosa and transfers it to the injured area using an external incision and exposure to reestablish mucosal lining. The transfer is performed without excision of the tissue, using an external approach to access and reposition the flap. Typical codes: 0CX4XZZ
A 60-year-old patient with prior radiation and failed primary mucosal closure is returned to the operating room for revision of a chronic intraoral fistula. Scarred tissue is released and a well-vascularized segment of buccal mucosa is mobilized and transposed to cover the fistula site to reestablish a durable mucosal lining and promote healing. The procedure involves transfer of the buccal mucosa without removal, performed via an open approach to ensure adequate mobilization and fixation. Typical codes: 0CX40ZZ

Related Codes

0CX0-UPPER-LIP-TRANSFER

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

0CX1-LOWER-LIP-TRANSFER

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

0CX3-SOFT-PALATE-TRANSFER

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

0CX5-UPPER-GINGIVA-TRANSFER

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

0CX6-LOWER-GINGIVA-TRANSFER

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

0CX7-TONGUE-MOVING-TONGUE-TRANSFER

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

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

2 rows

ICD-10-PCS Code	Description
0CX40ZZ	Transfer Buccal Mucosa, Open Approach
0CX4XZZ	Transfer Buccal Mucosa, 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 45-year-old man presents for a planned reconstructive procedure after resection of a small oral cavity tumor, leaving a mucosal defect of the cheek. Intraoperatively the surgeon mobilizes a segment of ipsilateral buccal mucosa and transfers it to the defect to restore lining and function without removing the tissue. An open approach is used when the mucosal flap is elevated and repositioned to cover the surgical defect. Typical codes: 0CX40ZZ
A 32-year-old woman is admitted urgently after a facial dog-bite causing loss of buccal mucosal continuity and exposure of deeper tissues. To repair the defect and restore oral competence, the surgeon mobilizes adjacent buccal mucosa and transfers it to the injured area using an external incision and exposure to reestablish mucosal lining. The transfer is performed without excision of the tissue, using an external approach to access and reposition the flap. Typical codes: 0CX4XZZ
A 60-year-old patient with prior radiation and failed primary mucosal closure is returned to the operating room for revision of a chronic intraoral fistula. Scarred tissue is released and a well-vascularized segment of buccal mucosa is mobilized and transposed to cover the fistula site to reestablish a durable mucosal lining and promote healing. The procedure involves transfer of the buccal mucosa without removal, performed via an open approach to ensure adequate mobilization and fixation. Typical codes: 0CX40ZZ

Related Codes

0CX0-UPPER-LIP-TRANSFER

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

0CX1-LOWER-LIP-TRANSFER

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

0CX3-SOFT-PALATE-TRANSFER

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

0CX5-UPPER-GINGIVA-TRANSFER

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

0CX6-LOWER-GINGIVA-TRANSFER

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

0CX7-TONGUE-MOVING-TONGUE-TRANSFER

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

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 Transfer 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 Transfer 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 transfer group 0CX4?

What body system and operation do codes in group 0CX4 represent?

How does accurate coding within the 0CX4 group affect inpatient reimbursement?

Which DRG categories may be associated with procedures coded in 0CX4?

What clinical scenario does the 0CX4 transfer procedure describe?

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 transfer group 0CX4?

What body system and operation do codes in group 0CX4 represent?

How does accurate coding within the 0CX4 group affect inpatient reimbursement?

Which DRG categories may be associated with procedures coded in 0CX4?

What clinical scenario does the 0CX4 transfer procedure describe?

References