2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Cerebrovascular Disease 430-438 > Occlusion And Stenosis Of Precerebral Arteries 433.* > 2006 ICD-9-CM Diagnosis 433.20 Occlusion and stenosis of vertebral artery without cerebral infarction View the most recent version of ICD-9-CM 433.20 433.20 is a specific code that can be used to specify a diagnosis View the ICD-9-CM Volume 1 433.* hierarchy