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 8 Other cerebral infarction
 * I63.9 Cerebral infarction, unspecified
 * Stroke NOS

I65 Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction

 * Includes: embolism of precerebral artery
 * narrowing of precerebral artery
 * obstruction (complete) (partial) of precerebral artery
 * thrombosis of precerebral artery
 * Excludes1: insufficiency, NOS, of precerebral artery (G45.-)
 * insufficiency of precerebral arteries causing cerebral infarction (I63.0-I63.2)
 * I65.0 Occlusion and stenosis of vertebral artery
 * I65.01 Occlusion and stenosis of right vertebral artery
 * I65.02 Occlusion and stenosis of left vertebral artery
 * I65.03 Occlusion and stenosis of bilateral vertebral arteries
 * I65.09 Occlusion and stenosis of unspecified vertebral artery
 * I65.1 Occlusion and stenosis of basilar artery
 * I65.2 Occlusion and stenosis of carotid artery
 * I65.21 Occlusion and stenosis of right carotid artery
 * I65.22 Occlusion and stenosis of left carotid artery
 * I65.23 Occlusion and stenosis of bilateral carotid arteries
 * I65.29 Occlusion and stenosis of unspecified carotid artery
 * I65.8 Occlusion and stenosis of other precerebral arteries
 * I65.9 Occlusion and stenosis of unspecified precerebral artery
 * Occlusion and stenosis of precerebral artery NOS

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
 * Excludes1: Occlusion and stenosis of cerebral artery causing cerebral infarction (I63.3-I63.5)
 * I66.0 Occlusion and stenosis of middle cerebral artery
 * I66.01 Occlusion and stenosis of right middle cerebral artery
 * I66.02 Occlusion and stenosis of left middle cerebral artery
 * I66.03 Occlusion and stenosis of bilateral middle cerebral arteries
 * I66.09 Occlusion and stenosis of unspecified middle cerebral artery
 * I66.1 Occlusion and stenosis of anterior cerebral artery
 * I66.11 Occlusion and stenosis of right anterior cerebral artery
 * I66.12 Occlusion and stenosis of left anterior cerebral artery
 * I66.