CPT® Code 27598

The procedure described by CPT® Code 27598 refers to a disarticulation at the knee, which is a surgical operation involving the complete removal of the leg at the knee joint. This procedure is typically indicated in cases where there is severe trauma, infection, or other medical conditions that necessitate the amputation of the leg at this specific joint. The surgical technique involves creating a fish-mouth incision, which is a specific type of incision that allows for the effective removal of the leg while preserving as much surrounding tissue as possible for optimal healing and prosthetic fitting. The anterior flap is designed to extend approximately 4 inches distal to the knee joint, while the posterior flap extends about 1.5 inches distal to the joint, ensuring adequate coverage and closure post-surgery. The procedure requires careful dissection of the skin down to the deep fascia, followed by the reflection of the flaps to expose the knee joint and surrounding structures. The surgical steps involve the division of key anatomical structures, including the patellar tendon, joint capsule, ligaments, and blood vessels, which are essential for the successful execution of the disarticulation. The meticulous approach taken during this procedure aims to minimize complications and promote effective recovery for the patient.