ICD-10-CM > R00-R99 > R90-R94 > R94 > R94.1 > R94.12 R94.12 Abnormal results of function studies of ear and other special senses Non-Billable/Non-Specific Codes R94.120Abnormal auditory function studyR94.121Abnormal vestibular function studyR94.128Abnormal results of other function studies of ear and other special senses