CPT code 15758 represents a reconstructive microvascular procedure — a free fascial flap with microvascular anastomosis — in which skin and underlying fascial tissue with its blood supply are harvested from a donor site and transplanted to a defect using microscopic vessel repair. This code captures complex, operative-level reconstructive work that is clinically critical for wound coverage, functional restoration, and salvage of tissue after trauma, oncologic resection, or chronic soft-tissue loss. Nationally, accurate coding for this procedure affects surgical case mix reporting, facility and professional reimbursement, and quality measurement in reconstructive surgery.

Key payers included in the analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise guide to the clinical context of the procedure, typical sites of service, and how this service is categorized in billing. The publication outlines common modifier usage (provided separately), payer coverage patterns where available, and benchmarking context for utilization and reimbursement. It also summarizes relevant policy and documentation considerations that influence claim acceptance and audit risk. Data not available in the input is noted where applicable, and the report is intended for national audiences including coding professionals, surgical teams, and payer policy analysts seeking a clear reference on CPT code 15758.