CPT® Code 92518

Vestibular evoked myogenic potential (VEMP) testing is a specialized diagnostic procedure used to assess the function of the vestibular system, which is crucial for balance and spatial orientation. This testing is particularly valuable in diagnosing various causes of dizziness and auditory symptoms. The VEMP test involves the application of auditory stimuli, typically loud and repetitive sounds such as clicks or pulses, delivered to one ear at a time. In the case of ocular VEMP (oVEMP), the focus is on measuring the muscle activity in the eye muscles that respond to the sound stimulus. The procedure is conducted with the patient positioned with their head tilted to one side, allowing for precise measurement of the muscle responses. The testing protocol includes the use of electromyogram (EMG) feedback to monitor muscle activation, providing real-time data on the vestibular function. The results of the oVEMP testing yield critical information regarding the integrity of the vestibular labyrinth, specifically the utricle and the superior branch of the vestibular nerve. This data is essential for clinicians to interpret the vestibular system's health and to formulate appropriate treatment plans for patients experiencing balance disorders or auditory issues.