CPT® Code 64913

Add-On Code

The procedure described by CPT® Code 64913 involves the repair of an injured nerve using nerve allograft, specifically focusing on each additional strand utilized in the repair process. In this context, a nerve allograft refers to a graft taken from a donor (such as a cadaver) that is used to replace or repair a damaged nerve. The primary goal of this procedure is to achieve a tension-free repair of the nerve, which is crucial for facilitating the patient's own axonal regeneration following a nerve injury. During the procedure, the injured nerve is carefully exposed, and the extent of the injury is thoroughly evaluated. This evaluation is critical as it informs the surgeon about the necessary steps to restore nerve function effectively. Using microscopic visualization, the surgeon debrides and trims the proximal and distal ends of the injured nerve until healthy fascicular nerve structure is encountered, ensuring that the repair is made on viable tissue. The length of the nerve deficit and the diameter of the nerve are measured to select an appropriately sized and processed allograft. The allograft is then prepared and shaped to fit the specific requirements of the repair. The single-strand nerve graft is meticulously sutured to the epineurium of the damaged nerve, connecting the distal and proximal ends while preserving the anatomical structure of the nerve. In cases where large diameter nerves are involved, additional allograft strands may be necessary to adequately bridge the nerve deficit. The procedure concludes with the layered repair of the overlying soft tissues and skin, ensuring proper healing and restoration of function. It is important to note that if multiple nerve strand injuries are present, they can be repaired using allograft cables in a similar manner. This code, 64913, is used in conjunction with code 64912, which reports the first strand of nerve repair with allograft.