CPT® Code 64840

The procedure described by CPT® Code 64840 involves the suture repair of the posterior tibial nerve, which is a critical nerve in the lower leg responsible for sensory and motor functions in the foot and ankle. This surgical intervention is often necessary when the nerve has been transected or injured, leading to loss of function or sensation. The repair can be performed using various techniques depending on the location and severity of the injury. For distal injuries, an epineural closure technique is typically employed, where the outer layer of the nerve, known as the epineurium, is sutured to bring the two ends of the nerve together without applying tension. In cases of more proximal injuries, a perineural closure technique may be utilized, which involves exposing the individual fascicles of axons within the nerve. This method allows for a more precise alignment of the nerve fibers that are responsible for specific functions, ensuring that sensory and motor fascicles are properly approximated and sutured together. The goal of this procedure is to restore the continuity of the nerve, promote healing, and ultimately regain function in the affected areas.