ICD-10-CM > R00-R99 > R90-R94 > R90 R90 Abnormal findings on diagnostic imaging of central nervous system Non-Billable/Non-Specific Codes R90.0Intracranial space-occupying lesion found on diagnostic imaging of central nervous systemR90.8Other abnormal findings on diagnostic imaging of central nervous systemR90.81Abnormal echoencephalogramR90.82White matter disease, unspecifiedR90.89Other abnormal findings on diagnostic imaging of central nervous system