EEG is used in combination with other neurodiagnostic tests to evaluate seizure focus, sleep and metabolic disorders, dementia, and brain death. An EEG picks up on the brain waves, which may show irregularities of activity, amplitude, pattern, or speed. The electroencephalogram (EEG) detects electrical activity in the brain through electrodes that are attached at measured positions on the scalp at rest or sleep. Relying on a medical billing company with expertise in neurology and internal medicine medical billing is the best option for physicians to ensure billing and coding efficiency.ĮEG is one of the most reliable tools to detect and investigate epilepsy. Neurologists, family practice and general practice physicians, physicians in internal medicine, and other specialists involved in the care of patients with seizures and epilepsy need to understand the usage of the new codes and their potential impact on patient care. There are also updates to special EEG tests guidelines and definitions in 2020. One of the most notable changes is the overhauling of the codes for reporting long term electroencephalographic (EEG) monitoring services. Several new CPT codes and guidelines take effect January 1, 2020.