CPT® Code 92651

Auditory evoked potentials (AEP) are physiological responses that can be measured in response to auditory stimuli, such as acoustic pulses, brief tones, or short bursts of broadband clicks. These responses are essentially voltage fluctuations that occur in the brain following the presentation of sound stimuli. The primary purpose of conducting AEP testing is to assess the neurological function related to hearing and to identify any potential hearing loss. In the context of newborns, a specific screening protocol is utilized, which involves the presentation of sound stimuli to each ear. This screening is reported under CPT® code 92650 and is part of a universal newborn hearing screening initiative. During this screening, data is collected regarding the evoked potential responses, which are analyzed using an automated computer algorithm. The healthcare provider is responsible for monitoring electrode impedance and ensuring the presence or absence of valid responses as dictated by the algorithm, ultimately generating a pass or refer result. CPT® code 92651 is utilized for post-screening or follow-up testing, particularly when a child has been referred for further evaluation. This follow-up testing focuses on determining the auditory brainstem response (ABR) to broadband sound stimuli and is typically performed while the infant is asleep or under anesthesia for children aged 6 months to 7 years. The sound is delivered through an acoustic transducer into the ear canal using earphones or headphones. The resulting waveform response is captured by surface electrodes, which are usually placed on the forehead and earlobes, or alternatively configured on the forehead, nape of the neck, and either the shoulder or cheek. If a response is not detected at moderate to high stimulus levels, a higher stimulus may be presented. Conversely, if a response is easily identified and replicated, the stimulus level may be reduced. The amplitude of the recorded signal is averaged and plotted over time, akin to an EEG recording, and the findings are subsequently interpreted and documented in a written report.