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 > Phlebitis And Thrombophlebitis 451.* > 2006 ICD-9-CM Diagnosis 451.1 Phlebitis and thrombophlebitis of deep veins of lower extremities View the most recent version of ICD-9-CM 451.1 451.1 is a non-specific code that cannot be used to specify a diagnosis View the ICD-9-CM Volume 1 451.* hierarchy