Poisoning by antirheumatics, NEC, undetermined, subs

This code signifies an adverse health effect resulting from an exposure to an antirheumatic medication not specified elsewhere, where the intent of the exposure cannot be determined. This could include a patient experiencing ongoing symptoms or complications from a previously unclarified exposure to such a drug.

Use this code when a patient presents for follow-up care, monitoring, or treatment of residual effects from a poisoning by an antirheumatic drug, and the initial encounter's documentation did not clarify whether the poisoning was accidental, intentional self-harm, assault, or therapeutic misadventure. This is appropriate for subsequent visits after the acute phase of the poisoning.

• Ensure documentation clearly states the encounter is "subsequent" and not the initial treatment for the poisoning.
• Confirm the substance involved is an antirheumatic not classified under more specific codes (e.g., salicylates, NSAIDs).
• Only use "undetermined" when the intent of the poisoning cannot be definitively established from the medical record.