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 464.31 Acute epiglottitis with obstruction  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 Therefore, this code may be out of date.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 464.31 can be accessed here. 464.31 is a specific code that can be used to specify a diagnosis 464.31 contains 4 index entries View the ICD-9-CM Volume 1 464.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. Index entries containing 464.31: Epiglottiditis (acute) 464.30 with obstruction 464.31 viral 464.30 with obstruction 464.31 Epiglottitis (acute) 464.30 with obstruction 464.31 viral 464.30 with obstruction 464.31