© Copyright 2026 American Medical Association. All rights reserved.
An electroencephalogram (EEG) is a diagnostic procedure that measures and records the electrical activity of the brain. This specific procedure, identified by CPT® Code 95953, involves the use of a computerized portable EEG system with 16 or more channels to monitor and localize the cerebral seizure focus. The EEG captures electrical current potentials generated by nerve cells in the brain, allowing for the analysis of variations in wave characteristics that may indicate the presence of seizure activity. The procedure is designed to be performed on an outpatient basis, utilizing a portable, ambulatory recording device that enables long-term monitoring of brain activity while the patient engages in their normal daily activities. During the procedure, electrodes, or leads, are strategically placed on the scalp to detect electrical signals. These leads are connected to a miniature recording device, which is typically worn on a belt or shoulder harness. This setup allows for continuous recording of brain activity over an extended period, often for several days. Once the recording period is complete, the patient returns to the facility, where the leads and recording device are removed. The physician then downloads the recorded data onto a computer for detailed evaluation and interpretation, ultimately generating a written report of the findings. It is important to report CPT® Code 95953 for each 24-hour period of monitoring conducted during this procedure.
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