These links go to CDC for the latest information on ICD-9-CM.
ICD-9 Classification of Diseases, Functioning, and Disability web page.
ICD-9-CM Files via FTP (2010)
ICD-9-CM Files via FTP (2011)
ICD-9-CM 2011 Addenda and Conversion table
These pdf files include Addenda and Errata for 2008 – 2011
ICD-9 Provider & Diagnostic Codes Full and Abbreviated Code Titles (from CMS)
These zip files include Versions 20 – 32.