Adverse effect of other parasympathomimetics, subs encntr

This code signifies a patient experiencing an unintended and harmful reaction to a parasympathomimetic medication, also known as a cholinergic drug, during a follow-up visit. These medications stimulate the parasympathetic nervous system and are often used for conditions like glaucoma, myasthenia gravis, or urinary retention. The adverse effect is not due to poisoning or overdose, but rather an expected or unexpected side effect at therapeutic doses.

Use this code when a patient presents for ongoing management or evaluation of an adverse effect from a cholinergic medication, and this is not the initial encounter for the problem. Examples include a patient returning for persistent bradycardia, increased salivation, or gastrointestinal distress attributed to their prescribed pilocarpine or neostigmine. This code is appropriate when the adverse effect is still being treated or monitored.

• Ensure documentation clearly states the adverse effect is due to a cholinergic medication and that this is a subsequent encounter.
• Always code the specific manifestation of the adverse effect first, followed by this code to identify the drug class.
• Distinguish between adverse effects (therapeutic dose) and poisoning (overdose or wrong substance), which use different T-codes.