2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Injury And Poisoning 800-999 > Poisoning By Drugs, Medicinals And Biological Substances 960-979 > ICD-9-CM Diagnosis 971 Poisoning by drugs primarily affecting the autonomic nervous system 971 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 971.0 Poisoning by parasympathomimetics (cholinergics) 971.0 is a specific code that can be used to specify a diagnosis ICD-9-CM Diagnosis 971.1 Poisoning by parasympatholytics (anticholinergics and antimuscarinics) and spasmolytics 971.1 is a specific code that can be used to specify a diagnosis ICD-9-CM Diagnosis 971.2 Poisoning by sympathomimetics (adrenergics) 971.2 is a specific code that can be used to specify a diagnosis ICD-9-CM Diagnosis 971.3 Poisoning by sympatholytics (antiadrenergics) 971.3 is a specific code that can be used to specify a diagnosis ICD-9-CM Diagnosis 971.9 Poisoning by unspecified drug primarily affecting autonomic nervous system 971.9 is a specific code that can be used to specify a diagnosis