MEG Epilepsy Source Localization Scan, CPT Code 95965
During this scan, the patient rests on a bed while the MEG scanner records the brain's biomagnetic fields due to interictal activity. EEG recordingsare made simultaneously. After a digital headshape measurement of the head is made, the location of the brain regions that generate that activity are estimated and overlaid onto the patient's MRI. This information assists the physician to determine if the epileptic activity is concentrated in one, or a few, focal regions, and whether those regions are possible candidates for resection. This procedure takes about 3.5 hours.

MEG Somatosensory Mapping, CPT 95966 or 95967
Puffs of air are used during MEG Somatosensory mapping to stimulate the patient's fingers, lips, and toes. At the same time, the MEG scanner measures the biomagnetic fields produced by the patient's brain. From these measurements, regions of the brain responding to the stimuli are located. The locations are overlaid onto the patient's MRI to provide information about the position of the eloquent cortex relative to the surgical target. This test is intended to assist in the pre-operative evaluation of the surgical outcome and selection of an optimal surgical plan.

MEG Receptive Language Mapping, CPT 95966 or 95967
This scan provides neurologists and neurosurgeons with information regarding the location of brain structures involved with language functions. This information is used to:
- identify the hemisphere dominant for language
- identify specific areas within the hemisphere that support receptive language function
- optimize the surgical treatment plan
- this scan may need to be performed on a separate day from an Epilepsy Source Localization scan