CPT® Code 95813

An electroencephalogram (EEG) with extended monitoring, specifically coded as CPT® 95813, refers to a diagnostic procedure that records the electrical activity of the brain for a duration of 61 to 119 minutes. This extended monitoring is crucial for obtaining a comprehensive assessment of brain function, particularly in cases where shorter monitoring periods may not provide sufficient data. The EEG is instrumental in diagnosing various neurological conditions, including seizure disorders, confusion, unconsciousness, head injuries, and other brain-affecting conditions such as tumors, infections, degenerative diseases, or metabolic disturbances. Additionally, EEGs can be utilized to evaluate sleep disorders, providing insights into the brain's activity during different sleep stages. During the procedure, a trained EEG technician applies 16 or more electrodes to the patient's scalp, using a conductive paste to ensure optimal signal transmission. These electrodes are connected to an amplifier and recording device, which captures the brain's electrical signals. The patient is instructed to remain still with their eyes closed to minimize artifacts in the recording. Once the machine is activated, it begins to convert the brain's electrical signals into graphical representations, typically displayed as wavy lines on graph paper. Throughout the recording, specific techniques such as hyperventilation or photic stimulation may be employed to provoke seizure activity, aiding in the diagnostic process. After the monitoring period, a physician reviews the recorded data and provides a detailed written interpretation of the findings, which is essential for guiding further clinical decisions.