2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Injury And Poisoning 800-999 > Toxic Effects Of Substances Chiefly Nonmedicinal As To Source 980-989 > 2006 ICD-9-CM Diagnosis 986 Toxic effect of carbon monoxide View the most recent version of ICD-9-CM 986 986 is a specific code that can be used to specify a diagnosis 986 contains 3 index entries  Index entries containing 986: Asphyxia, asphyxiation (by) 799.01 carbon monoxide 986 Carboxyhemoglobinemia 986 Inhalation carbon monoxide 986