Scombroid fish poisoning, accidental (unintentional), init

This code signifies an adverse reaction to consuming scombroid fish (e.g., tuna, mackerel, mahi-mahi) that has been improperly stored, leading to the accumulation of histamine. Patients typically present with allergy-like symptoms such as flushing, headache, palpitations, and gastrointestinal distress, which are not true allergic reactions but rather a toxic response.

Assign this code when documenting the initial encounter for a patient experiencing symptoms consistent with scombroid fish poisoning due to accidental ingestion. This applies to cases where the patient unknowingly consumed contaminated fish and is presenting for evaluation and treatment of the acute symptoms.

• Ensure documentation clearly states the poisoning was accidental and due to scombroid fish.
• Confirm this is the patient's first presentation for this specific poisoning episode.
• Do not use for allergic reactions to fish; this is a toxic reaction.