CPT® Code 95903

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Nerve conduction studies (NCS) are diagnostic tests utilized to assess the functionality of peripheral nerves. These studies are particularly important for identifying nerve damage and various nerve disorders, including conditions such as carpal tunnel syndrome. Patients may present with symptoms like numbness, tingling, or other abnormal sensations, which can indicate underlying nerve issues. During the procedure, several flat metal disc electrodes are affixed to the skin using paste or tape. A shock-emitting electrode is strategically placed over the nerve being examined, while a recording electrode is positioned over the muscles that the nerve innervates. The test involves sending electrical pulses through the shock-emitting electrode, which stimulates the nerve. The conduction time is measured, which reflects how long it takes for the muscle to contract in response to the electrical stimulus. Additionally, the amplitude, or strength of the muscle response, along with the latency or velocity of the nerve conduction, is recorded. After the procedure, the physician analyzes the collected data and compiles a written report detailing the findings. For coding purposes, CPT® Code 95900 is used for each motor nerve conduction study conducted without an F-wave study, while CPT® Code 95903 is designated for studies that include the F-wave analysis. The F-wave study is particularly valuable as it provides insights into the function of the proximal segment of the nerve, with typically 10 or more F-wave recordings taken at each stimulus site. For sensory nerve conduction studies, which follow a similar methodology but focus on the sensory nerve, CPT® Code 95904 is applicable.