In simple words: This code indicates a late effect from being poisoned by a type of heart medication other than those specifically listed elsewhere, and where it is not known how the poisoning happened.

This code represents the long-term consequences or sequelae resulting from a poisoning by other antidysrhythmic drugs, where the intent or circumstance surrounding the poisoning is undetermined.

Example 1: A patient presents with persistent neurological deficits following a suspected overdose of an antiarrhythmic medication, but the details of the event remain unclear. The patient's current condition is a direct result of the poisoning incident., A patient experiences chronic kidney disease as a sequela of an unintentional poisoning by an unclassified antidysrhythmic drug., A patient experiences permanent liver damage as a long-term complication after an episode of poisoning by sotalol, the circumstances of which could not be definitively determined.

Documentation should support the diagnosis of poisoning with an antidysrhythmic drug, the undetermined nature of the event, and a causal link between the poisoning and the sequelae. Supporting documentation, like medical records from the initial event, lab results, and ongoing care notes, are crucial for accurate coding.

** For accurate and comprehensive coding, utilize specific poisoning codes (T46.2X1-T46.2X4) if the intent or circumstance is known. If a retained foreign body is present, code Z18.- should be used. An additional code may be necessary to fully describe the specific sequelae. The code is exempt from the Present on Admission (POA) reporting requirement.