Thanks, this answer was so very helpful. I was trying to find an acceptable dx code for a patient where they are trying to rule out hearing impairment but the patient hasn't been diagnosed with hearing loss. This should point me in the right direction. will convert to equivalent ICD-10 code.According to the American Academy of Audiology and ASHA, you can bill for the type of hearing loss that was suspected if you don't find any hearing loss. In our Audiology practice, we also find the codes 388.40 Abnormal Auditory Perception (where the patient thinks they can't hear) or 388.43 Impairment of Auditory Discrimination (where the patient thinks they can hear but they can't understand) very useful.