CPT® Code 27691

Transfer or transplant of single tendon (with muscle redirection or rerouting); deep (eg, anterior tibial or posterior tibial through interosseous space, flexor digitorum longus, flexor hallucis longus, or peroneal tendon to midfoot or hindfoot)

The procedure described by CPT® Code 27691 involves the transfer or transplant of a single deep tendon in the lower leg, specifically targeting tendons such as the anterior tibial or posterior tibial tendon. This surgical intervention is typically performed to restore function that may have been compromised due to traumatic injuries affecting the nerve, tendon, or muscle. In some cases, the loss of function may also arise from conditions like rheumatoid arthritis or gouty arthritis. The complexity of the procedure can vary based on the specific function that the surgeon aims to restore. Unlike the superficial tendon transfers, which are categorized under CPT® Code 27690, the deep tendon transfer requires more intricate dissection of deeper tissues to facilitate the rerouting of the tendon to the designated recipient site. The procedure is essential for patients who have experienced significant loss of mobility or function in the foot or ankle, and it involves careful planning and execution to ensure optimal outcomes. The surgical technique includes making incisions to access the donor tendon, freeing it from its attachments, and securing it at the recipient site, all while ensuring that the tendon is adequately tensioned for effective function post-surgery.