2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Respiratory System 460-519 > Chronic Obstructive Pulmonary Disease And Allied Conditions 490-496 > ICD-9-CM Diagnosis 490 Bronchitis not specified as acute or chronic (bron-KYE-tis) Inflammation (swelling and reddening) of the bronchi. 490 is a specific code that can be used to specify a diagnosis 490 contains 15 index entries