CPT® Code 15756

The CPT® Code 15756 refers to a surgical procedure known as a free muscle or myocutaneous flap with microvascular anastomosis. This complex procedure is performed under general anesthesia and involves the transplantation of a muscle or myocutaneous flap from a donor site to a defect area in the body. The term "free flap" indicates that the tissue is completely detached from its original blood supply and is reattached to the recipient site using microvascular techniques. The procedure is essential for reconstructive surgery, particularly in cases where significant tissue loss has occurred due to trauma, surgery, or congenital defects. The process begins with the careful preparation of the donor area, where the muscle or myocutaneous flap is harvested. This harvested tissue is then meticulously sutured into the defect area, ensuring proper alignment and positioning. A critical aspect of this procedure is the microvascular anastomosis, which involves connecting the blood vessels of the donor tissue to those in the recipient site, ensuring that the transplanted tissue receives an adequate blood supply for survival and healing. The use of microscopy during this phase allows for precision in the connection of the vessels, which is vital for the success of the flap. Additionally, techniques such as the injection of fluorescent dye may be employed to verify the integrity of the vascular connections. Post-surgery, the wound is closed, and appropriate dressings are applied to both the recipient and donor sites, with splinting sometimes required to minimize flap shrinkage during the healing process.