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2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Cerebrovascular Disease 430-438 > ICD-9-CM Diagnosis 435 Transient cerebral ischemia 435 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 435.0 Basilar artery syndrome 435.0 is a specific code that can be used to specify a diagnosis 435.0 contains 5 index entries ICD-9-CM Diagnosis 435.1 Vertebral artery syndrome 435.1 is a specific code that can be used to specify a diagnosis 435.1 contains 11 index entries ICD-9-CM Diagnosis 435.2 Subclavian steal syndrome A clinically significant reduction in blood supply to the BRAIN STEM and CEREBELLUM (i.e., VERTEBROBASILAR INSUFFICIENCY) resulting from reversal of blood flow through the VERTEBRAL ARTERY from occlusion or stenosis of the proximal subclavian or brachiocephalic artery. Common symptoms include VERTIGO; SYNCOPE; and INTERMITTENT CLAUDICATION of the involved upper extremity. Subclavian steal may also occur in asymptomatic individuals. (From J Cardiovasc Surg 1994;35(1):11-4; Acta Neurol Scand 1994;90(3):174-8) 435.2 is a specific code that can be used to specify a diagnosis 435.2 contains 3 index entries ICD-9-CM Diagnosis 435.3 Vertebrobasilar artery syndrome Localized or diffuse reduction in blood flow through the vertebrobasilar arterial system, which supplies the BRAIN STEM; CEREBELLUM; OCCIPITAL LOBE; medial TEMPORAL LOBE; and THALAMUS. Characteristic clinical features include SYNCOPE; lightheadedness; visual disturbances; and VERTIGO. BRAIN STEM INFARCTIONS or other BRAIN INFARCTION may be associated. 435.3 is a specific code that can be used to specify a diagnosis 435.3 contains 3 index entries ICD-9-CM Diagnosis 435.8 Other specified transient cerebral ischemias 435.8 is a specific code that can be used to specify a diagnosis 435.8 contains 7 index entries ICD-9-CM Diagnosis 435.9 Unspecified transient cerebral ischemia Brief reversible episodes of focal, nonconvulsive ischemic dysfunction of the brain having a duration of less than 24 hours, and usually less than one hour, caused by transient thrombotic or embolic blood vessel occlusion or stenosis. Events may be classified by arterial distribution, temporal pattern, or etiology (e.g., embolic vs. thrombotic). (From Adams et al., Principles of Neurology, 6th ed, pp814-6) 435.9 is a specific code that can be used to specify a diagnosis 435.9 contains 28 index entries