Poisoning by diagnostic agents, undetermined, subs encntr

This code signifies a patient presenting for follow-up care or treatment of adverse effects resulting from an undetermined poisoning by a diagnostic agent. The initial cause of the poisoning, whether accidental, intentional, or therapeutic misadventure, could not be determined at the time of the initial encounter.

Utilize this code when a patient is seen for ongoing management of symptoms or complications from a diagnostic agent poisoning, and the intent of the poisoning remains unclear. This applies to subsequent visits after the initial treatment for the acute event.

• Always sequence this code after the primary diagnosis indicating the specific adverse effect or complication being treated.
• Ensure documentation clearly states the encounter is subsequent and the intent of the poisoning is undetermined.
• Do not use for initial encounters or when the intent (e.g., accidental, intentional self-harm) is known.