| MDC 1 Diseases & Disorders of the Nervous System |
| Transient Ischemia |
| G450 | Vertebro-basilar artery syndrome |
| G451 | Carotid artery syndrome (hemispheric) |
| G452 | Multiple and bilateral precerebral artery syndromes |
| G458 | Other transient cerebral ischemic attacks and related syndromes |
| G459 | Transient cerebral ischemic attack, unspecified |
| G460 | Middle cerebral artery syndrome |
| G461 | Anterior cerebral artery syndrome |
| G462 | Posterior cerebral artery syndrome |
| I6781 | Acute cerebrovascular insufficiency |
| I6782 | Cerebral ischemia |
| I67841 | Reversible cerebrovascular vasoconstriction syndrome |
| I67848 | Other cerebrovascular vasospasm and vasoconstriction |
| I6789 | Other cerebrovascular disease |