http://wonder.cdc.gov/wonder/sci_data/codes/icd9/type_txt/icd9cm.aspRich text descriptions here:
http://www.cdc.gov/nchs/icd/icd9cm.htm
This is the more easily machine-readable source which is used for
icd9CmDesc
http://www.cms.gov/Medicare/Coding/ICD9ProviderDiagnosticCodes/codes.html
http://wonder.cdc.gov/wonder/help/icd.html
http://wonder.cdc.gov/wonder/sci_data/codes/icd9/type_txt/icd9abb.asp
http://wonder.cdc.gov/wonder/sci_data/codes/icd9/type_txt/icd9cm.asp
http://wonder.cdc.gov/wonder/sci_data/codes/icd9/type_txt/icdcm.asp
http://wonder.cdc.gov/wonder/sci_data/codes/icd9/type_txt/icd9abb.asp