Adverse effect of parasympatholytics and spasmolytics, subs

This code indicates a patient is experiencing an unintended and harmful reaction to a medication that blocks the action of acetylcholine, such as anticholinergics or antispasmodics. This adverse effect is being addressed during a follow-up visit after the initial treatment for the reaction has begun.

Use this code when a patient presents for ongoing management or evaluation of an adverse effect from an anticholinergic or antispasmodic drug. This applies to situations where the initial treatment for the adverse effect has already been provided, and the current encounter is for continued care.

• Requires an additional code to specify the nature of the adverse effect (e.g., dry mouth, urinary retention).
• Always sequence this code after the code for the specific adverse effect.
• Distinguish from "initial encounter" (A) or "sequela" (S) based on the patient's current stage of care for the adverse effect.