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2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Respiratory System 460-519 > Acute Respiratory Infections 460-466 > Acute Sinusitis 461.* > 2007 ICD-9-CM Diagnosis 461.0 Acute maxillary 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 Therefore, this code may be out of date.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 461.0 can be accessed here. 461.0 is a specific code that can be used to specify a diagnosis 461.0 contains 5 index entries View the ICD-9-CM Volume 1 461.* hierarchy 461.0 also known as: Acute antritis Index entries containing 461.0: Antritis (chronic) 473.0 maxilla 473.0 acute 461.0 Disease, diseased - see also Syndrome antral (chronic) 473.0 acute 461.0 Rhinoantritis (chronic) 473.0 acute 461.0 Sinusitis (accessory) (nasal) (hyperplastic) (nonpurulent) (purulent) (chronic) 473.9 acute 461.9 maxillary 461.0 maxillary 473.0 acute 461.0