2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Diseases Of Veins And Lymphatics, And Other Diseases Of Circulatory System 451-459 > ICD-9-CM Diagnosis 452 Portal vein thrombosis 452 is a specific code that can be used to specify a diagnosis 452 contains 7 index entries