ICD-10-CM > R00-R99 > R90-R94 > R94 > R94.1 > R94.11 R94.11 Abnormal results of function studies of eye Non-Billable/Non-Specific Codes R94.110Abnormal electro-oculogram [EOG]R94.111Abnormal electroretinogram [ERG]R94.112Abnormal visually evoked potential [VEP]R94.113Abnormal oculomotor studyR94.118Abnormal results of other function studies of eye