CPT® Code 92519

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 conditions that may cause dizziness or auditory symptoms. The VEMP test involves the application of auditory stimuli, typically loud, repetitive sounds such as clicks or pulses, delivered to one ear at a time. This can also be achieved through bone conduction vibrations. During the test, the muscle activity in response to these stimuli is monitored and recorded using electromyography (EMG). The cervical VEMP (cVEMP) focuses on measuring the activation of the ipsilateral sternocleidomastoid muscle, while the ocular VEMP (oVEMP) assesses the response from the contralateral eye muscles. The procedure is conducted with the patient’s head positioned to one side, allowing for a comprehensive evaluation of the vestibular labyrinth's integrity, specifically the saccule and utricle, as well as the associated vestibular nerves. The results of the VEMP testing are analyzed to determine response amplitude symmetry between the ears and are compared against normative data, culminating in a detailed interpretation and report. This comprehensive approach ensures that both cervical and ocular VEMP testing are performed, providing a thorough understanding of the vestibular function and aiding in the diagnosis of related disorders.