CPT® Code 92546

A sinusoidal vertical axis rotational test, designated by CPT® Code 92546, is a specialized diagnostic procedure that assesses the functionality of the vestibular-ocular system. This test is crucial for understanding how well the eyes and inner ear work together to maintain balance and coordinate eye movements. During the procedure, electronystagmography (ENG) is utilized to record eye movements, providing valuable data on the patient's vestibular function. The test involves the patient being seated in a rotational chair, where they undergo a controlled, slow, harmonic acceleration rotation that typically lasts between 30 to 40 minutes. This method allows for a comprehensive evaluation of the relationship between natural head movements and corresponding eye movements, which are essential components of the body's balance mechanism. Horizontal electrodes are strategically placed on the skin at both the inner and outer aspects of each eye to capture precise eye movement data. Following the test, the physician meticulously reviews the recorded data to analyze and interpret the results, aiding in the diagnosis of any vestibular disorders or dysfunctions.