2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Respiratory System 460-519 > Acute Respiratory Infections 460-466 > Acute Sinusitis 461.* > 2008 ICD-9-CM Diagnosis 461.3 Acute sphenoidal sinusitis  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 Therefore, this code may be out of date.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 461.3 can be accessed here. 461.3 is a specific code that can be used to specify a diagnosis 461.3 contains 2 index entries View the ICD-9-CM Volume 1 461.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. Index entries containing 461.3: Sinusitis (accessory) (nasal) (hyperplastic) (nonpurulent) (purulent) (chronic) 473.9 acute 461.9 sphenoidal 461.3 sphenoidal 473.3 acute 461.3