CPT® Code 26508

The thenar muscles are a group of intrinsic muscles located in the palm of the hand, specifically associated with the movement of the thumb. These muscles include the abductor pollicis brevis, flexor pollicis brevis, opponens pollicis, and adductor pollicis. They play a crucial role in the thumb's ability to perform various movements, such as opposition, flexion, and abduction. The origin of these muscles is from the flexor retinaculum and the carpal bones, while their insertion point is at the proximal phalanx of the thumb. The procedure described by CPT® Code 26508 involves the surgical release of one or more of these thenar muscles to alleviate thumb contracture, a condition that restricts the normal range of motion of the thumb. During the procedure, a surgical incision is made over the palm and proximal phalanx of the thumb to access the thenar muscles. The surgeon evaluates these muscles to identify which ones are contributing to the contracture. Once identified, the responsible muscle(s) are carefully cut to release the contracture, allowing for improved thumb mobility. After the release, the range of motion is assessed, and if necessary, further release may be performed. The procedure concludes with the closure of the incision in layers, followed by immobilization of the hand in a splint or cast to promote healing.