I66.8
ICD-10BillableOcclusion and stenosis of other cerebral arteries
Official ICD-10-CM descriptor (FY2026)
Occlusion and stenosis of other cerebral arteries
I66.8 is valid for submission on a claim — CMS flags it as a billable, specific code.
Inclusion terms
- Occlusion and stenosis of perforating arteries
Related codes in I66
Where this code sits
- Parent code
- I66
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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.