Summary & Overview
CPT 95966: Magnetoencephalography for Evoked Brain Magnetic Activity
CPT code 95966 represents magnetoencephalography (MEG) for recording and analyzing evoked brain magnetic activity. MEG is a specialized, noninvasive neuroimaging modality used to map brain function and evaluate neural responses to stimuli. Nationally, MEG is important for pre-surgical functional mapping, localization of epileptic foci, and research into sensory and cognitive processing, and it influences care pathways in neurology and neurosurgery.
Key payers referenced in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context, typical sites of service, and the procedural scope of CPT code 95966. The publication summarizes common billing considerations and the service line context, and outlines what to expect in payer coverage patterns and documentation requirements at a national level. The piece highlights benchmarks and policy-relevant points affecting utilization and reimbursement for advanced neurodiagnostic services. Data not provided in the input (such as associated taxonomies, specific ICD-10 diagnoses, related codes, and service-line cost benchmarks) are noted as unavailable where applicable.
Billing Code Overview
CPT code 95966 describes recording and analysis of the patient’s evoked brain magnetic activity using magnetoencephalography (MEG), a neuroimaging technique that uses sensors to form images of the magnetic fields produced within the brain. The procedure focuses on capturing brain responses to stimuli or events to evaluate neural activity and pathways.
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Service type: Diagnostic neurophysiology / functional neuroimaging
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Typical site of service: Hospital outpatient department or specialized neurodiagnostic laboratory with MEG equipment
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult referred for pre-surgical functional brain mapping or evaluation of focal epileptiform activity not clearly localized on EEG or MRI. The patient arrives to an outpatient neurodiagnostic or hospital-based neurophysiology lab where a magnetoencephalography (MEG) technologist explains the procedure, applies head localization coils, and records the patient’s evoked magnetic fields while the patient performs rest, task, or sensory stimulation protocols. A board-certified neurologist or clinical neurophysiologist supervises, reviews raw data for artifact, and performs advanced source localization and analysis to identify epileptic foci or eloquent cortex. The imaging output is correlated with MRI for multimodal mapping and provided in a clinical report used for surgical planning or diagnostic clarification. Typical site of service is an outpatient hospital-based MEG suite or specialized ambulatory neurodiagnostic center. The service type is diagnostic neurophysiology (magnetoencephalography) performed with professional interpretation and analysis under CPT code 95966.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the physician interpretation/analysis portion of the MEG when technical component billed separately. |