2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Diseases Of Arteries, Arterioles, And Capillaries 440-448 > Aortic Aneurysm And Dissection 441.* > 2008 ICD-9-CM Diagnosis 441.0 Dissection of aorta  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 Therefore, this code may be out of date.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 441.0 can be accessed here. 441.0 is a non-specific code that cannot be used to specify a diagnosis View the ICD-9-CM Volume 1 441.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog.