2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Injury And Poisoning 800-999 > Poisoning By Drugs, Medicinals And Biological Substances 960-979 > 2006 ICD-9-CM Diagnosis 971 Poisoning by drugs primarily affecting the autonomic nervous system View the most recent version of ICD-9-CM 971 971 is a non-specific code that cannot be used to specify a diagnosis