CPT® Code 95870

Needle electromyography; limited study of muscles in 1 extremity or non-limb (axial) muscles (unilateral or bilateral), other than thoracic paraspinal, cranial nerve supplied muscles, or sphincters

Needle electromyography (EMG) is a specialized diagnostic procedure designed to assess the electrical activity of muscles, particularly in response to nerve stimulation. This test is particularly useful for evaluating symptoms such as pain, weakness, numbness, or tingling that may arise from various neuromuscular disorders. The CPT® Code 95870 specifically refers to a limited study of muscles in one extremity or non-limb (axial) muscles, which can be performed unilaterally or bilaterally. However, it is important to note that this procedure excludes the evaluation of thoracic paraspinal muscles, muscles supplied by cranial nerves, and sphincter muscles. During the EMG, one or more fine needle electrodes are inserted through the skin into the muscle tissue to record the electrical signals generated by muscle fibers. These signals are then transmitted to a recording device that displays the electrical activity visually. The physician may instruct the patient to perform specific movements to capture recordings of muscle activity during both flexion and extension. The resulting data, which illustrates the action potential of muscle fibers, is analyzed by the physician, who subsequently prepares a comprehensive report detailing the findings of the study. This procedure is critical for diagnosing a range of conditions, including muscle inflammation, nerve compression, herniated discs, peripheral nerve injuries, and various muscular diseases.