Anaphylactic reaction due to shellfish (crustaceans), init

This code signifies a severe, life-threatening allergic reaction characterized by rapid onset of systemic symptoms such as respiratory distress, hypotension, and angioedema, specifically triggered by the ingestion or exposure to shellfish (crustaceans). It indicates the initial presentation of this acute event.

Apply this code when a patient presents with the first documented instance of anaphylaxis directly attributable to consuming or coming into contact with crustaceans like shrimp, crab, or lobster. This is appropriate for emergency department visits or initial clinic encounters for such an event.

• Ensure documentation clearly links the anaphylactic reaction to shellfish (crustaceans) as the causative agent.
• Verify that this is indeed the initial encounter for this specific anaphylactic episode, not a subsequent visit for follow-up or complications.
• Do not use for allergic reactions that are not anaphylactic in nature (e.g., mild rash, hives without systemic symptoms).