2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Respiratory System 460-519 > Other Diseases Of Upper Respiratory Tract 470-478 > Other Diseases Of Upper Respiratory Tract 478.* > 2008 ICD-9-CM Diagnosis 478.4 Polyp of vocal cord or larynx  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 Therefore, this code may be out of date.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 478.4 can be accessed here. 478.4 is a specific code that can be used to specify a diagnosis 478.4 contains 2 index entries View the ICD-9-CM Volume 1 478.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. 478.4 excludes: adenomatous polyps (212.1) Index entries containing 478.4: Polyp, polypus larynx (mucous) 478.4 vocal cord (mucous) 478.4