Summary & Overview
CPT 15738: Lower Extremity Muscle/Myocutaneous/Fasciocutaneous Flap
CPT code 15738 denotes creation of a muscle, myocutaneous, or fasciocutaneous flap from a patient’s lower extremity to repair injuries or close open wounds. This reconstructive procedure is critical for limb salvage, wound coverage, and restoration of function after trauma, infection, or chronic ulceration. Nationally, proper coding for complex flap procedures affects clinical coordination, hospital resource allocation, and payment pathways for surgical teams and facilities.
Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical indications, typical sites of service, associated procedural groupings, and the common billing relationships between 15738 and nearby flap and wound closure codes. The publication outlines typical documentation elements that support medical necessity for lower-extremity flap reconstruction and highlights common clinical scenarios driving use, such as traumatic open wounds and non-healing ulcers.
The report provides benchmarks and policy context relevant to claims processing and coverage considerations, explains how 15738 relates to other reconstructive CPT codes, and summarizes payer practice patterns where available. Data not available in the input is noted explicitly when applicable.
Billing Code Overview
CPT code 15738 describes the surgical creation of a muscle, myocutaneous, or fasciocutaneous flap harvested from a lower extremity to treat injury or to close an open wound on an affected area. The procedure involves raising tissue with its vascular supply from the leg to reconstruct soft-tissue defects and promote wound closure.
Service Type: Reconstructive soft-tissue flap surgery
Typical Site of Service: Operating room or surgical suite, inpatient or outpatient hospital setting, depending on wound severity and patient condition.
Clinical & Coding Specifications
Clinical Context
A 57-year-old patient presents to the emergency department after a motor vehicle collision with an open, contaminated laceration of the right lower leg with exposed tendon and soft-tissue loss consistent with S81.801A. Initial wound management includes irrigation, debridement, fracture stabilization if present, and temporary wound coverage. After serial debridements and optimization of vascular status and infection control over several days, the reconstructive surgical team (Plastic and Reconstructive Surgery) performs a lower extremity muscle or fasciocutaneous flap from the ipsilateral or contralateral thigh to provide durable soft-tissue coverage of the defect. The procedure is performed in the operating room under general anesthesia, with intraoperative monitoring and postoperative admission for flap monitoring. Typical workflow: preoperative consult and vascular assessment, operative debridement and flap planning, flap harvest and inset (coded with 15738), donor-site closure, postoperative flap surveillance, wound care, and outpatient follow-up for flap viability and rehabilitation. Payors involved may include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, BUCA, and Medicare.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
50 | Bilateral procedure | When identical flap procedures are performed on both lower extremities during the same operative session. |