-- I63.20 Cerebral infarction due to unspecified occlusion or stenosis of unspecified precerebral arteries

-- I63.21 Cerebral infarction due to unspecified occlusion or stenosis of vertebral arteries

--- I63.211 Cerebral infarction due to unspecified occlusion or stenosis of right vertebral artery

--- I63.212 Cerebral infarction due to unspecified occlusion or stenosis of left vertebral artery

--- I63.213 Cerebral infarction due to unspecified occlusion or stenosis of bilateral vertebral arteries

--- I63.219 Cerebral infarction due to unspecified occlusion or stenosis of unspecified vertebral artery

-- I63.22 Cerebral infarction due to unspecified occlusion or stenosis of basilar artery

-- I63.23 Cerebral infarction due to unspecified occlusion or stenosis of carotid arteries

--- I63.231 Cerebral infarction due to unspecified occlusion or stenosis of right carotid arteries

--- I63.232 Cerebral infarction due to unspecified occlusion or stenosis of left carotid arteries

--- I63.233 Cerebral infarction due to unspecified occlusion or stenosis of bilateral carotid arteries

--- I63.239 Cerebral infarction due to unspecified occlusion or stenosis of unspecified carotid artery

-- I63.29 Cerebral infarction due to unspecified occlusion or stenosis of other precerebral arteries