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 458 Hypotension 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 ICD-9-CM Diagnosis 458.0 Orthostatic hypotension A drop in blood pressure upon standing or after standing motionless in a static position. 458.0 is a specific code that can be used to specify a diagnosis 458.0 contains 2 index entries ICD-9-CM Diagnosis 458.1 Chronic hypotension 458.1 is a specific code that can be used to specify a diagnosis 458.1 contains 2 index entries ICD-9-CM Diagnosis 458.2 Iatrogenic hypotension 458.2 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 458.21 Hypotension of hemodialysis 458.21 is a specific code that can be used to specify a diagnosis 458.21 contains 1 index entry ICD-9-CM Diagnosis 458.29 Other iatrogenic hypotension 458.29 is a specific code that can be used to specify a diagnosis 458.29 contains 3 index entries ICD-9-CM Diagnosis 458.8 Other specified hypotension 458.8 is a specific code that can be used to specify a diagnosis 458.8 contains 1 index entry ICD-9-CM Diagnosis 458.9 Hypotension unspecified Abnormally low blood pressure seen in shock but not necessarily indicative of it. Abnormally low blood pressure. 458.9 is a specific code that can be used to specify a diagnosis 458.9 contains 6 index entries