CPT® Code 64616

Chemodenervation of muscle(s); neck muscle(s), excluding muscles of the larynx, unilateral (eg, for cervical dystonia, spasmodic torticollis)

Chemodenervation is a medical procedure aimed at alleviating involuntary muscle contractions or spasms in the neck, specifically targeting the neck muscles on one side of the body. This condition is commonly known as cervical dystonia or spasmodic torticollis, where the muscles in the neck contract uncontrollably, leading to abnormal head positions and discomfort. The procedure involves the injection of botulinum toxin, either type A or B, directly into the affected muscles. This toxin works by temporarily paralyzing the muscle, effectively blocking the release of acetylcholine at the peripheral nerve endings. By interrupting the neuromuscular transmission of nerve impulses, the procedure helps to reduce muscle spasms and improve the patient's quality of life. The selection of the specific muscle or muscle group for injection is typically guided by electromyography or through a physical examination, which includes palpating the neck muscles and observing the head's position to identify the areas of spasm. Prior to the injection, the side of the neck to be treated is prepared to ensure a sterile environment, and the injection is administered at carefully chosen sites to achieve optimal denervation of the targeted muscles.