2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Respiratory System 460-519 > Acute Respiratory Infections 460-466 > Acute Bronchitis And Bronchiolitis 466.* > 2006 ICD-9-CM Diagnosis 466.1 Acute bronchiolitis View the most recent version of ICD-9-CM 466.1 Inflammation of the bronchioles. 466.1 is a non-specific code that cannot be used to specify a diagnosis View the ICD-9-CM Volume 1 466.* hierarchy Alternate Terminology Bronchiolitis (acute) Capillary pneumonia