Poisoning by hydantoin derivatives, assault, init encntr

This code signifies an intentional overdose or harmful exposure to hydantoin derivatives, a class of anticonvulsant medications, inflicted by another person. The patient is in the acute phase of treatment for the poisoning. This includes conditions like phenytoin toxicity resulting from an assault.

Apply this code when documentation clearly indicates a patient has been poisoned by hydantoin derivatives due to an assault, and they are receiving initial care for this event. This would be appropriate for emergency department visits or initial hospital admissions for such an incident.

• Always verify the intent (assault) and the specific substance (hydantoin derivative) from the medical record.
• Ensure the encounter is the "initial encounter" for the poisoning; subsequent care would use a different seventh character.
• Code any associated signs, symptoms, or adverse effects of the poisoning in addition to this code.