Summary & Overview
CPT 15104: Free Skin Flap with Microvascular Anastomosis
CPT code 15104 denotes a reconstructive surgical procedure involving free skin flap transfer with microvascular anastomosis to cover wounds or defects. This complex microsurgical technique is clinically significant because it enables definitive soft-tissue coverage, functional restoration, and improved healing in patients with traumatic injuries, oncologic resections, or chronic nonhealing wounds. Nationally, such procedures are performed in tertiary care centers and specialty hospitals and have implications for surgical capacity, postoperative care resources, and payer coverage policies.
Key payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context and service setting for 15104, along with an outline of the types of benchmarks and policy considerations typically relevant to this code. The publication highlights expected benchmarking elements such as utilization patterns, site-of-service implications, and payer coverage dynamics, plus clinical context including indications and typical perioperative resource needs. Data not available in the input will be noted where applicable, and readers should expect a national perspective on coding, billing considerations, and where policy updates most commonly affect authorization and reimbursement practices.
Billing Code Overview
CPT code 15104 represents a procedure in the realm of tissue transfer, specifically involving the transplantation of a free skin flap with microvascular anastomosis for coverage of a wound or defect. This procedure is a form of reconstructive surgery used to restore form and function following trauma, oncologic resection, or chronic wound complications.
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Service type: Reconstructive microsurgical tissue transfer
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Typical site of service: Hospital operating room or specialty surgical center
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A typical patient scenario involves a reconstructive surgery requiring a soft tissue graft for coverage of a complex wound or defect. For example, a 54-year-old male undergoes excision of a soft-tissue tumor from the anterior lower leg, resulting in a full-thickness defect requiring tissue transfer. The surgical team harvests a local pedicled flap and prepares a dermal or adipofascial graft to reconstruct and cover the defect. The procedure is performed in an outpatient ambulatory surgery center or an inpatient hospital operating room under general or regional anesthesia. Perioperative workflow includes preoperative evaluation, marking and planning of the donor and recipient sites, harvest and shaping of the graft, inset and fixation of the graft to the recipient bed, hemostasis, and layered closure of donor and recipient sites. Postoperative care includes wound dressings, pain control, monitoring for flap viability, and scheduled follow-up visits for wound assessment and suture removal.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when work, time, or intensity of the procedure is substantially greater than typically required. |
24 | Unrelated evaluation and management service by the same physician during a postoperative period |