Following the transition to International Classification of Diseases, 10th Revision, Clinical Modification (ICD-10-CM), there will be a familiar yet slightly enhanced and streamlined selection of codes for poisoning and adverse or toxic effects.

As with International Classification of Diseases, 9th Revision, Clinical Modification (ICD-9-CM), a Table of Drugs and Chemicals is used to locate the appropriate code category for poisoning or toxic effect (by intent) and adverse effects of substances. A new category of codes is included to report underdosing of a prescribed medication. The table provides reference to code categories by substance (eg, drug, chemical, venom) with columns separating accidental poisoning, intentional poisoning, poisoning by assault, poisoning of undetermined intent, adverse effect, and underdosing (see example entry below).

The table includes only references to the correct code category or subcategory. It is necessary to refer to the ICD-10-CM tabular list for complete codes and reporting...

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