Question: What are the surgical and anesthesia codes for an acoustic exam under anesthesia? Answer: You should report 92585 (Auditory evoked potentials for evoked response audiometry and/or testing of the central nervous system; comprehensive) for the acoustic exam, and 00120 (Anesthesia for procedures on external, middle, and inner ear including biopsy; not otherwise specified) for the anesthesia.
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Patients do not normally require anesthesia during this procedure, so include thorough documentation to support medical necessity. You may also append modifier -23 (Unusual anesthesia) with notes explaining the case.