The procedures listed below constitute electronystagmography(ENG), or videonystagmography (VNG).  Each of these procedures is eligible for payment as a distinct and separate service: 

1. Spontaneous nystagmus test, including gaze and fixation nystagmus, with recording (92541)
2. Positional nystagmus test, with recording (92542)
3. Caloric vestibular test, each irrigation, with recording (92543)
4. Optokinetic nystagmus test, bidirectional, foveal, or peripheral stimulation, with recording (92544)
5. Oscillating tracking test, with recording (92545)
6. Sinusoidal vertical axis rotational testing (92546)

When 92547 is reported with any of the above listed ENG services (92541-92546), the charges for placement of the vertical electrodes will be paid in addition to the ENG service.  When reported alone, placement of vertical electrodes (92547) will be denied as a noncovered service.  A participating, preferred, or network provider cannot bill the member separately for the placing of the vertical electrodes.

Description

Electronystagmography involves the electrical recording of involuntary eye movements.  It is usually performed in the evaluation of dizziness, vertigo, or balance dysfunction.  Metal electrodes are placed above, beside, and below each eye to detect eye movements.

Videonystagmography or VNG provides vestibular examinations and performs electronystagmography without the use of electrodes.  Such non-invasive video systems record, analyze, and report eye movements using video imaging technology.  VNG requires the patient to wear a pair of infrared goggles and allows recording of actual video images of eye movement in real time.