ICD-10-CM > R00-R99 > R90-R94 > R94 > R94.1 R94.1 Abnormal results of function studies of peripheral nervous system and special senses Non-Billable/Non-Specific Codes R94.11Abnormal results of function studies of eyeR94.110Abnormal electro-oculogram [EOG]R94.111Abnormal electroretinogram [ERG]R94.112Abnormal visually evoked potential [VEP]R94.113Abnormal oculomotor studyR94.118Abnormal results of other function studies of eyeR94.12Abnormal results of function studies of ear and other special sensesR94.120Abnormal auditory function studyR94.121Abnormal vestibular function studyR94.128Abnormal results of other function studies of ear and other special sensesR94.13Abnormal results of function studies of peripheral nervous systemR94.130Abnormal response to nerve stimulation, unspecifiedR94.131Abnormal electromyogram [EMG]R94.138Abnormal results of other function studies of peripheral nervous system