2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Injury And Poisoning 800-999 > Poisoning By Drugs, Medicinals And Biological Substances 960-979 > Poisoning By Other Central Nervous System Depressants And Anesthetics 968.* > 2008 ICD-9-CM Diagnosis 968.1 Poisoning by halothane  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 Therefore, this code may be out of date.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 968.1 can be accessed here. 968.1 is a specific code that can be used to specify a diagnosis View the ICD-9-CM Volume 1 968.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog.