Personal history of allergy to serum or vaccine

This code signifies a patient's documented past allergic reaction to a serum or vaccine, even if the patient is not currently experiencing symptoms. It indicates a historical sensitivity that may impact future medical treatment decisions, particularly regarding immunizations or passive immunity administration.

Apply this code when a patient's medical record clearly states a previous allergic response to a vaccine or serum. This is relevant for pre-vaccination screening, medication reconciliation, or when planning future treatments involving biological products. It serves as a crucial alert for healthcare providers.

• Ensure the documentation specifies an allergic reaction, not just a side effect or adverse event.
• Verify that the history is of a serum or vaccine and not another type of medication.
• This is a historical code; it does not indicate an active allergic reaction.