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2007 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.* > 2007 ICD-9-CM Diagnosis 478.20 Unspecified disease of pharynx  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 Therefore, this code may be out of date.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 478.20 can be accessed here. 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