CPT^® 64721, Under Neuroplasty (Exploration, Neurolysis or Nerve Decompression) Procedures on the Extracranial Nerves, Peripheral Nerves, and Autonomic Nervous System

Summary

Neuroplasty or transposition of the median nerve at the carpal tunnel is done to treat a condition called carpal tunnel syndrome (CTS). The carpal tunnel is a narrow tunnel in the wrist through which the median nerve and nine flexor tendons of the hand pass. The tendons include the four flexor digitorum superficialis tendons, four flexor digitorum profundus tendons, and one flexor pollicis longus tendon. The top of the tunnel over the median nerve is covered by the transverse carpal ligament. Inflammation of any of these tendons results in the compression of the median nerve or CTS in which the patient feels numbness and weakness of the muscles in the hand. CTS may be caused due to disease conditions such as rheumatoid arthritis, acromegaly, hypothyroidism, and amyloidosis; or due to work–related conditions that require repetitive movement of fingers such as working long hours on computer keyboards or playing keyboard instruments like the piano.

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