Otolaryngology Coding Alert
Do You Know What Happens During ENG?
Understanding a procedure helps you code it better.
An ENG is used to detect disorders of the peripheral vestibular system (the parts of the inner ear that interpret balance and spatial orientation) or the nerves that connect the vestibular system to the brain and the muscles of the eye. Your physician might order an ENG if the patient is experiencing unexplained dizziness, vertigo, or hearing loss. Additional conditions that might warrant an ENG include acoustic neuroma, labyrinthitis, Usher syndrome, and Meniere’s disease.
During the test, electrodes are placed at locations above and below the eye to record electrical activity. By measuring the changes in the electrical field within the eye, ENG can detect nystagmus (involuntary rapid eye movement) in response to various stimuli. If nystagmus does not occur on stimulation, a problem may exist within the ear, nerves that supply the ear, or certain parts of the brain. This test may also be used to distinguish between lesions in various parts of the brain and nervous system.
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