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2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Respiratory System 460-519 > Chronic Obstructive Pulmonary Disease And Allied Conditions 490-496 > Asthma 493.* > 2008 ICD-9-CM Diagnosis 493.01 Extrinsic asthma with status asthmaticus 493.01 is a specific code that can be used to specify a diagnosis View the ICD-9-CM Volume 1 493.* hierarchy