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2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Injury And Poisoning 800-999 > Poisoning By Drugs, Medicinals And Biological Substances 960-979 > Poisoning By Drugs Primarily Affecting The Autonomic Nervous System 971.* > 2007 ICD-9-CM Diagnosis 971.1 Poisoning by parasympatholytics (anticholinergics and antimuscarinics) and spasmolytics  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 Therefore, this code may be out of date.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 971.1 can be accessed here. 971.1 is a specific code that can be used to specify a diagnosis View the ICD-9-CM Volume 1 971.* hierarchy 971.1 also known as: Atropine Homatropine Hyoscine [scopolamine] Quaternary ammonium derivatives 971.1 excludes: papaverine (972.5)