2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Cerebrovascular Disease 430-438 > 2006 ICD-9-CM Diagnosis 433 Occlusion and stenosis of precerebral arteries View the most recent version of ICD-9-CM 433 433 is a non-specific code that cannot be used to specify a diagnosis 433 Includes embolism of basilar, carotid, and vertebral arteries narrowing of basilar, carotid, and vertebral arteries obstruction of basilar, carotid, and vertebral arteries thrombosis of basilar, carotid, and vertebral arteries 433 Excludes insufficiency NOS of precerebral arteries (435.0-435.9)