R90

ICD-10Non-billable category

Abnormal findings on diagnostic imaging of cnsl

Official ICD-10-CM descriptor (FY2026)

Abnormal findings on diagnostic imaging of central nervous system

R90 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

More specific codes under R90

Where this code sits

Chapter: 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
Block: Abnormal findings on diagnostic imaging and in function studies, without diagnosis (R90-R94)

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.