Anaphylactic reaction due to food additives, init encntr

This code signifies an acute, severe, and potentially life-threatening systemic allergic reaction triggered by the ingestion of food additives. Symptoms can include respiratory distress, angioedema, urticaria, gastrointestinal upset, and cardiovascular collapse. This reaction is distinct from food allergies caused by natural food proteins.

Apply this code when a patient presents with their first documented anaphylactic episode directly attributable to a food additive, such as sulfites, artificial colors, or preservatives. This code is appropriate for the initial evaluation and treatment of such an event.

• Ensure documentation clearly specifies "food additive" as the allergen, not a natural food product.
• Confirm the encounter is the "initial encounter" for this specific anaphylactic event. Subsequent encounters for the same event would use a different seventh character.
• Always code any associated signs and symptoms, such as dyspnea or urticaria, as additional diagnoses.