CPT® Code 27395

The procedure described by CPT® Code 27395 involves the lengthening of multiple hamstring tendons on a bilateral basis. This surgical intervention is primarily indicated for patients suffering from conditions such as spastic cerebral palsy, meningomyelocele, or other neurological disorders that lead to muscle imbalances, particularly resulting in a flexed-knee gait. The hamstring group consists of three key muscles: the biceps femoris, semitendinosus, and semimembranosus, which play crucial roles in extending the knee and flexing the thigh. The lengthening procedure aims to alleviate the tightness of these tendons, thereby improving the patient's ability to walk and move more freely. The surgical technique involves making an incision in the popliteal crease, exposing the tendon, and creating a Z-shaped incision to facilitate the lengthening process. This allows the tendon fibers to slide apart as the knee is extended, ultimately leading to a more functional range of motion. Following the procedure, tendon sutures are placed to secure the tendon in its newly lengthened position, and a long leg or cylinder cast is applied to maintain the knee in an extended position during the recovery phase.