2006 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.* > 2006 ICD-9-CM Diagnosis 478.20 Unspecified disease of pharynx View the most recent version of ICD-9-CM 478.20 General or unspecified diseases of the pharynx. 478.20 is a specific code that can be used to specify a diagnosis 478.20 contains 2 index entries View the ICD-9-CM Volume 1 478.* hierarchy  Index entries containing 478.20: Disease, diseased - see also Syndrome pharynx 478.20 throat 478.20 septic 034.0