Summary & Overview

CPT 15770: Composite Graft Harvesting and Inset

CPT code 15770 identifies the surgical harvest and suturing of a composite graft composed of dermis, fat, and fascia (or combinations thereof) into a recipient site. This procedure is used in reconstructive and plastic surgery to repair soft-tissue defects where tissue layers beyond skin are required. Nationally, the code matters because it represents a specialized reconstructive technique with implications for surgical scheduling, resource use, and coverage determinations across major payers.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find benchmarks on utilization and payment patterns for this procedure, a concise clinical context describing when composite grafting is used, and a review of relevant policy considerations that affect prior authorization and coverage decisions. The content also highlights common coding relationships and potential billing scenarios relevant to reconstructive surgeons and billing staff.

This publication is designed to help clinical leaders, billing teams, and policy analysts understand where CPT code 15770 fits within reconstructive service lines, what to expect in typical sites of service, and which payer policies commonly shape access and reimbursement for composite graft procedures.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 15770composite graftreconstructive surgeryplastic surgerygraft harvestingsurgical codingambulatory surgeryoperating room

Billing Code Overview

CPT code 15770 describes the harvest and placement of a composite graft composed of dermis, fat, and fascia (or a combination of these tissues) with suturing of the graft into a recipient site. This procedure typically involves tissue removal from a donor site and precise inset and fixation at a defect or reconstructive recipient site.

Service type: Surgical soft tissue reconstruction involving composite graft harvesting and grafting
Typical site of service: Operating room or ambulatory surgery center for reconstructive or plastic surgery cases

Clinical & Coding Specifications

Clinical Context

A typical patient is a 58-year-old man with a full-thickness traumatic skin defect of the lower leg after a motor vehicle collision. The defect exposes subcutaneous tissue with insufficient local tissue for primary closure. The surgical team harvests a composite graft consisting of dermis, subcutaneous fat, and fascia from a donor site (for example, the ipsilateral lateral thigh) and sutures the graft into the recipient site to restore contour and durable soft-tissue coverage. The procedure is performed in an operating room or procedural suite under general or regional anesthesia. Preoperative workflow includes wound assessment, marking the donor and recipient sites, informed consent, and surgical site preparation. Intraoperative workflow includes debridement of the recipient bed, meticulous hemostasis, harvest of the composite graft with appropriate dimensions, inset and layered suturing of the graft, possible drain placement, and dressing. Postoperative workflow includes monitoring graft viability, activity restrictions, wound care instructions, and scheduled follow-up visits for suture removal and assessment of graft take.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work, time, or complexity substantially exceeds usual for `15770` and documentation supports increased work.
`26`	Professional component	Use when reporting only the surgeon's professional component separate from technical facility charges (rare for this surgical CPT).
`50`	Bilateral procedure	Use when identical composite grafts are harvested and placed on symmetric sites during the same operative session.
`51`	Multiple procedures	Use when `15770` is performed along with other distinct surgical procedures during the same operative session.
`52`	Reduced services	Use when `15770` is partially reduced or not completed as planned and documentation supports reduced service.
`53`	Discontinued procedure	Use when `15770` is started but discontinued due to extenuating circumstances and documentation supports cancellation.
`58`	Staged or related procedure by same physician during postoperative period	Use when `15770` is planned as a staged procedure and performed during the global period for a prior procedure.
`59`	Distinct procedural service	Use to indicate a separate and distinct procedure from other services on the same day when bundling edits might apply.
`62`	Two surgeons	Use when two surgeons work together as primary surgeons performing distinct portions of `15770`.
`76`	Repeat procedure by same physician	Use when `15770` is repeated by the same physician subsequent to a prior attempt (if clinically indicated).
`77`	Repeat procedure by another physician	Use when `15770` is repeated by a different physician.
`78`	Unplanned return to the operating room for a related procedure during the postoperative period	Use when a return to the OR is required for a complication related to `15770`.
`79`	Unrelated procedure or service during the postoperative period	Use when an unrelated procedure is performed while `15770` is still within its global period.
`LT`	Left side	Use to indicate the procedure was performed on the left side when laterality is applicable.
`RT`	Right side	Use to indicate the procedure was performed on the right side when laterality is applicable.

Taxonomy Code	Specialty	Notes
`208K00000X`	Plastic Surgery	Primary specialty performing soft-tissue grafting and complex reconstruction.
`207N00000X`	Orthopedic Surgery	Performs limb soft-tissue reconstruction in trauma cases in coordination with plastics.
`207L00000X`	General Surgery	Performs soft-tissue grafting in abdominal wall or trunk reconstruction contexts.
`208000000X`	Dermatology	Performs composite grafting for selected cutaneous defects, primarily on head and neck.
`225100000X`	Podiatry	Performs composite grafts for complex foot and ankle soft-tissue defects.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`S81.001A`	Unspecified open wound of right knee, initial encounter	Traumatic open wounds with soft-tissue loss requiring composite graft coverage.
`S81.002A`	Unspecified open wound of left knee, initial encounter	As above for left-sided defects needing grafting.
`L98.4`	Non-healing surgical wound	Chronic or non-healing wounds may require composite grafting for durable coverage.
`T81.31XA`	Disruption of external operation (wound dehiscence), initial encounter	Wound dehiscence with tissue loss may require composite graft reconstruction.
`C44.311`	Basal cell carcinoma of skin of right lower leg, including ankle	Excisional defects after oncologic resection may be reconstructed with composite grafts.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`12001`	Simple repair of superficial wounds of scalp, neck, axillae, external genitalia, trunk and/or extremities; 2.5 cm or less	May be performed for minor adjacent wound repairs or donor-site closure following harvest for `15770`.
`13160`	Secondary closure of surgical wound or debridement, extensive	May be used for revision or secondary closure of a recipient site if additional excision or closure is required in conjunction with `15770`.
`14060`	Adjacent tissue transfer or rearrangement, trunk; defect 30.1 sq cm to 60.0 sq cm	Alternative or adjunctive reconstructive technique when local flap rather than composite graft is chosen for coverage.
`15271`	Full-thickness graft, scrotum or penis; first 30 sq cm or less, or each additional 30 sq cm, or fractional skin grafting	Represents alternative grafting techniques; cited for comparison to other graft types in reconstructive planning.
`15852`	Repair, complex, trunk; 1.1 sq cm to 7.5 sq cm	May be billed for complex layered closure of donor or recipient sites when additional deep suturing or complex repair is performed with `15770`.
`99024`	Postoperative follow-up visit, global period, included in surgical package	Used for routine postoperative care during the global period following `15770`.

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Summary & Overview

CPT 15770: Composite Graft Harvesting and Inset

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 15770composite graftreconstructive surgeryplastic surgerygraft harvestingsurgical codingambulatory surgeryoperating room

Billing Code Overview

Service type: Surgical soft tissue reconstruction involving composite graft harvesting and grafting
Typical site of service: Operating room or ambulatory surgery center for reconstructive or plastic surgery cases

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work, time, or complexity substantially exceeds usual for `15770` and documentation supports increased work.
`26`	Professional component	Use when reporting only the surgeon's professional component separate from technical facility charges (rare for this surgical CPT).
`50`	Bilateral procedure	Use when identical composite grafts are harvested and placed on symmetric sites during the same operative session.
`51`	Multiple procedures	Use when `15770` is performed along with other distinct surgical procedures during the same operative session.
`52`	Reduced services	Use when `15770` is partially reduced or not completed as planned and documentation supports reduced service.
`53`	Discontinued procedure	Use when `15770` is started but discontinued due to extenuating circumstances and documentation supports cancellation.
`58`	Staged or related procedure by same physician during postoperative period	Use when `15770` is planned as a staged procedure and performed during the global period for a prior procedure.
`59`	Distinct procedural service	Use to indicate a separate and distinct procedure from other services on the same day when bundling edits might apply.
`62`	Two surgeons	Use when two surgeons work together as primary surgeons performing distinct portions of `15770`.
`76`	Repeat procedure by same physician	Use when `15770` is repeated by the same physician subsequent to a prior attempt (if clinically indicated).
`77`	Repeat procedure by another physician	Use when `15770` is repeated by a different physician.
`78`	Unplanned return to the operating room for a related procedure during the postoperative period	Use when a return to the OR is required for a complication related to `15770`.
`79`	Unrelated procedure or service during the postoperative period	Use when an unrelated procedure is performed while `15770` is still within its global period.
`LT`	Left side	Use to indicate the procedure was performed on the left side when laterality is applicable.
`RT`	Right side	Use to indicate the procedure was performed on the right side when laterality is applicable.

Taxonomy Code	Specialty	Notes
`208K00000X`	Plastic Surgery	Primary specialty performing soft-tissue grafting and complex reconstruction.
`207N00000X`	Orthopedic Surgery	Performs limb soft-tissue reconstruction in trauma cases in coordination with plastics.
`207L00000X`	General Surgery	Performs soft-tissue grafting in abdominal wall or trunk reconstruction contexts.
`208000000X`	Dermatology	Performs composite grafting for selected cutaneous defects, primarily on head and neck.
`225100000X`	Podiatry	Performs composite grafts for complex foot and ankle soft-tissue defects.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`S81.001A`	Unspecified open wound of right knee, initial encounter	Traumatic open wounds with soft-tissue loss requiring composite graft coverage.
`S81.002A`	Unspecified open wound of left knee, initial encounter	As above for left-sided defects needing grafting.
`L98.4`	Non-healing surgical wound	Chronic or non-healing wounds may require composite grafting for durable coverage.
`T81.31XA`	Disruption of external operation (wound dehiscence), initial encounter	Wound dehiscence with tissue loss may require composite graft reconstruction.
`C44.311`	Basal cell carcinoma of skin of right lower leg, including ankle	Excisional defects after oncologic resection may be reconstructed with composite grafts.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`12001`	Simple repair of superficial wounds of scalp, neck, axillae, external genitalia, trunk and/or extremities; 2.5 cm or less	May be performed for minor adjacent wound repairs or donor-site closure following harvest for `15770`.
`13160`	Secondary closure of surgical wound or debridement, extensive	May be used for revision or secondary closure of a recipient site if additional excision or closure is required in conjunction with `15770`.
`14060`	Adjacent tissue transfer or rearrangement, trunk; defect 30.1 sq cm to 60.0 sq cm	Alternative or adjunctive reconstructive technique when local flap rather than composite graft is chosen for coverage.
`15271`	Full-thickness graft, scrotum or penis; first 30 sq cm or less, or each additional 30 sq cm, or fractional skin grafting	Represents alternative grafting techniques; cited for comparison to other graft types in reconstructive planning.
`15852`	Repair, complex, trunk; 1.1 sq cm to 7.5 sq cm	May be billed for complex layered closure of donor or recipient sites when additional deep suturing or complex repair is performed with `15770`.
`99024`	Postoperative follow-up visit, global period, included in surgical package	Used for routine postoperative care during the global period following `15770`.