2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Supplementary Classification Of External Causes Of Injury And Poisoning E800-E999 > Injury Undetermined Whether Accidentally Or Purposely Inflicted E980-E989 > Poisoning By Solid Or Liquid Substances Undetermined Whether Accidentally Or Purposely Inflicted E980.* > 2008 ICD-9-CM Diagnosis E980.6 Poisoning by corrosive and caustic substances undetermined whether accidentally or purposely inflicted  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 Therefore, this code may be out of date.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 E980.6 can be accessed here. E980.6 is a specific code that can be used to specify a diagnosis View the ICD-9-CM Volume 1 E980.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. E980.6 also known as: Poisoning, undetermined whether accidental or purposeful, by substances classifiable to E864