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I66 Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction
BackI66.0Occlusion and stenosis of middle cerebral arteryCategory4 →I66.01Occlusion and stenosis of right middle cerebral arteryCategoryI66.02Occlusion and stenosis of left middle cerebral arteryCategoryI66.03Occlusion and stenosis of bilateral middle cerebral arteriesCategoryI66.09Occlusion and stenosis of unspecified middle cerebral arteryCategoryI66.1Occlusion and stenosis of anterior cerebral arteryCategory4 →I66.11Occlusion and stenosis of right anterior cerebral arteryCategoryI66.12Occlusion and stenosis of left anterior cerebral arteryCategoryI66.13Occlusion and stenosis of bilateral anterior cerebral arteriesCategoryI66.19Occlusion and stenosis of unspecified anterior cerebral arteryCategoryI66.2Occlusion and stenosis of posterior cerebral arteryCategory4 →I66.21Occlusion and stenosis of right posterior cerebral arteryCategoryI66.22Occlusion and stenosis of left posterior cerebral arteryCategoryI66.23Occlusion and stenosis of bilateral posterior cerebral arteriesCategoryI66.29Occlusion and stenosis of unspecified posterior cerebral arteryCategoryI66.3Occlusion and stenosis of cerebellar arteriesCategoryI66.8Occlusion and stenosis of other cerebral arteriesCategoryI66.9Occlusion and stenosis of unspecified cerebral arteryCategory
Category
I66
Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction
INCLUDES
embolism of cerebral artery
narrowing of cerebral artery
obstruction (complete) (partial) of cerebral artery
thrombosis of cerebral artery
narrowing of cerebral artery
obstruction (complete) (partial) of cerebral artery
thrombosis of cerebral artery
EXCLUDES
Excludes1: Occlusion and stenosis of cerebral artery causing cerebral infarction (I63.3-I63.5)
- Chapter
- IX · Diseases of the circulatory system
- Section
- I60-I69
- Valid from
Source
CMS ICD-10-CM Tabular List, edition FY2026.