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2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Respiratory System 460-519 > Acute Respiratory Infections 460-466 > 2007 ICD-9-CM Diagnosis 466 Acute bronchitis and bronchiolitis  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 466 can be accessed here. 466 is a non-specific code that cannot be used to specify a diagnosis 466 includes: that with: bronchospasm obstruction