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2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Respiratory System 460-519 > Acute Respiratory Infections 460-466 > Acute Laryngitis And Tracheitis 464.* > 2008 ICD-9-CM Diagnosis 464.3 Acute epiglottitis  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 Therefore, this code may be out of date.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 464.3 can be accessed here. 464.3 is a non-specific code that cannot be used to specify a diagnosis View the ICD-9-CM Volume 1 464.* hierarchy 464.3 also known as: Viral epiglottitis 464.3 excludes: epiglottitis, chronic (476.1)