Poisoning by parasympatholytics (anticholinergics and antimuscarinics) and spasmolytics

This code indicates poisoning resulting from the adverse effects of parasympatholytic agents, including anticholinergics and antimuscarinics, as well as spasmolytics. These substances block acetylcholine receptors, leading to symptoms such as dry mouth, blurred vision, urinary retention, tachycardia, and central nervous system effects. The poisoning can be accidental or intentional.

Assign this code when documentation clearly states an overdose or adverse reaction to medications classified as parasympatholytics, anticholinergics, antimuscarinics, or spasmolytics. This includes scenarios like accidental ingestion, therapeutic misadventure, or intentional self-harm involving these drug classes. Supporting documentation should specify the drug class involved and the resulting toxic effects.

• Always sequence this code first if it is the primary reason for the encounter, followed by codes for specific manifestations of the poisoning.
• Distinguish between poisoning (overdose, wrong substance, wrong dose) and adverse effect (correct substance, correct dose, unexpected reaction), as different ICD-9-CM codes apply.
• Ensure the documentation specifies the type of drug (e.g., atropine, scopolamine, dicyclomine) to confirm it falls within the parasympatholytic/spasmolytic category.