CPT® Code 49906

A free omental flap is a surgical procedure that utilizes a portion of the greater omentum, which is a fold of peritoneum extending from the stomach and covering the intestines, to repair various types of defects in the body. The greater omentum is characterized by its unique vascular anatomy, featuring a dual blood supply that enhances its viability for reconstructive purposes. This flap consists of a rich network of blood vessels, adipose tissue, connective tissue, and immune cells, making it particularly effective for complex reconstructive surgeries. It is commonly employed in procedures aimed at repairing three-dimensional defects, such as those found in craniofacial and skull base reconstructions, as well as in scalp and head and neck repairs that may arise from tumor excisions, burns, hemifacial atrophy, or osteonecrosis due to radiation therapy. The procedure involves meticulous dissection and mobilization of the omentum, ensuring that the vascular supply is preserved for successful microvascular anastomosis, which is critical for the flap's survival and functionality in the recipient site.