Personal history of poisoning, presenting hazards to health

This code indicates a patient's past experience with poisoning, which is now considered a potential risk factor for future health issues or complications. It signifies that while the acute poisoning event has resolved, its history remains relevant for ongoing medical management.

This code is appropriate when a patient's medical record documents a prior poisoning event that is no longer acute but still influences current care decisions. It can be used for follow-up visits where the past poisoning is being monitored for long-term effects or when it impacts treatment plans for other conditions.

• Always sequence this code as a secondary diagnosis, as it represents a historical condition, not an active illness.
• Ensure documentation clearly states a history of poisoning and its potential relevance to the patient's current health status.
• Do not use this code for active poisoning events; refer to codes in the 980-989 range for acute poisoning.