Summary & Overview
CPT 20973: Great Toe Vascularized Bone Graft with Cutaneous Component
CPT code 20973 represents a specialized reconstructive surgery: harvesting vascularized bone from the great toe with an attached layer of skin to repair a bony defect and replace lost soft tissue. This complex procedure is clinically significant for limb salvage, traumatic reconstruction, and certain oncologic or infectious defects where both structural bone and soft-tissue coverage are required. Nationally, the code defines a resource-intensive microsurgical technique with implications for operative planning, perioperative care, and reimbursement policy.
Key payers typically involved in coverage decisions include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of what the code denotes, typical settings where the service is delivered, and the clinical context driving use. The publication outlines expected benchmarks and considerations for payers, highlights relevant coding relationships, and summarizes clinical indications that commonly prompt utilization of the procedure. It also flags where input was not provided in the source data (for example, associated taxonomies, specific ICD-10 pairings, and payer-specific reimbursement rates) and indicates that those items are not available in the input.
This summary is intended for clinicians, coding professionals, and payer policy analysts seeking a clear, national-level description of CPT code 20973 and the clinical service it represents.
Billing Code Overview
CPT code 20973 describes a surgical procedure in which the provider harvests bone graft material from the great toe including its active vascular supply and an attached layer of cutaneous tissue (skin). The harvested vascularized bone and skin are transferred to fill a bony defect at the recipient site and to compensate for soft tissue loss resulting from trauma or disease.
Service type: Vascularized bone graft with cutaneous component (great toe donor site)
Typical site of service: Operating room or surgical suite, with possible inpatient or outpatient admission depending on case complexity and recipient-site requirements
Clinical & Coding Specifications
Clinical Context
A 45-year-old male construction worker presents after a crush injury to the distal phalanx of the right index finger with exposed bone and soft tissue loss. The defect is associated with devitalized bone that requires reconstruction to restore skeletal continuity and soft tissue coverage. After debridement and imaging confirm a segmental bony defect of the distal phalanx and loss of overlying skin, the orthopedic/plastic surgery team plans a vascularized bone graft harvested from the great toe including its vascular pedicle and a skin paddle to reconstruct the finger. The operative workflow includes preoperative vascular assessment of the donor toe, sterile preparation of both donor and recipient sites, harvest of the vascularized great toe bone and associated cutaneous tissue using microsurgical technique, transfer and inset into the finger defect with microvascular anastomosis, fixation of the graft to recipient bone, layered soft tissue closure, and postoperative monitoring for graft perfusion and wound healing. Typical perioperative documentation includes donor site laterality (RT/LT), indication and ICD-10 diagnosis, procedure note describing harvest of vascularized great toe bone with attached skin paddle (20973), materials used, microvascular anastomosis details, estimated blood loss, and postoperative plan for monitoring and weight-bearing restrictions. Typical sites of service are an inpatient operating room or ambulatory surgical center for complex reconstruction depending on acuity and comorbidities. Typical providers include orthopedic hand surgeons and plastic/reconstructive microsurgeons with appropriate taxonomy designations.
Coding Specifications
| Modifier | Description |
|---|