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 > 2006 ICD-9-CM Diagnosis 458 Hypotension View the most recent version of ICD-9-CM 458 Abnormally low blood pressure. Abnormally low blood pressure seen in shock but not necessarily indicative of it. 458 is a non-specific code that cannot be used to specify a diagnosis 458 Includes hypopiesis 458 Excludes cardiovascular collapse (785.50) maternal hypotension syndrome (669.2) shock (785.50-785.59) Shy-Drager syndrome (333.0)