CPT code 95940 is an add-on code for continuous intraoperative neurophysiological monitoring (IOM) performed by a provider other than the surgeon or anesthesia staff during a separately reportable brain surgery. Reported in 15-minute units, the code captures monitoring activities such as EEG, EMG, evoked potentials, or nerve conduction studies intended to assess and preserve nervous system function while the operative procedure is underway. Nationally, utilization of intraoperative monitoring is clinically significant for risk mitigation in complex neurosurgical cases and factors into perioperative resource planning and billing workflows.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of how the code is used in clinical practice, unitization and reporting considerations, typical sites of service, and common payer coverage patterns. The publication also summarizes benchmarks for utilization and reimbursement where available, highlights policy updates affecting add-on intraoperative monitoring codes, and provides clinical context for when continuous neurophysiological monitoring is applied during brain surgery.

Data not available in the input for associated taxonomies, specific ICD-10 diagnoses, related codes, and detailed payer-specific payment rates.