Billing and Coding: Nerve Conduction Studies and Electromyography

Medicare allows electrodiagnostic NCS and EMG when tests provide real-time parameters (amplitude, latency, configuration, conduction velocity) and when billing meets CPT/diagnosis and supervision requirements. Automated NC-stat testing (CPT 95905) is allowed only for high pre-test probability of carpal tunnel (ICD G56.01/G56.02) at one service per arm and is otherwise restricted; CPT 95907-95913 and select EMG codes have single-payment-per-nerve limits and PTs may perform certain TC/PC components only if state law authorizes and required certifications/supervision designations are met.

"Automated nerve conduction testing using the NC-stat (CPT 95905) is allowed only when there is a high pre-test or prior probability of carpal tunnel syndrome and the claim uses diagnosis code G56."

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