Poisoning by oth antidysrhythmic drugs, undetermined, subs

This code signifies an adverse event resulting from an unspecified antidysrhythmic medication, where the intent of the poisoning is unknown. The patient is receiving ongoing care for the effects of this poisoning after the initial treatment.

Apply this code when a patient presents for follow-up care, monitoring, or treatment of complications arising from an antidysrhythmic drug overdose or adverse reaction, and the circumstances surrounding the exposure (e.g., accidental, intentional self-harm) cannot be determined. This is appropriate for subsequent visits after the acute phase of poisoning.

• Always sequence this code after the primary diagnosis for the condition being treated.
• Ensure documentation clearly indicates the encounter is for follow-up care related to the poisoning, not the initial treatment.
• If the specific antidysrhythmic drug is known, a more precise code from the T46.2X category should be considered if available.