Anaphyl reaction due to egg with rct to baked egg, subs

This diagnosis code signifies a patient experiencing a severe, life-threatening allergic reaction (anaphylaxis) specifically triggered by exposure to egg. The "reactivity to baked egg" component indicates that the patient's allergy extends even to egg that has been cooked or processed, which can sometimes denature allergens. The "subsequent encounter" denotes that this is not the initial presentation of this specific anaphylactic event.

Use this code for follow-up visits or ongoing management related to an anaphylactic reaction to egg, where the patient has a known sensitivity to baked egg. This would apply when a patient presents for allergy testing, desensitization therapy, or education after an initial anaphylactic episode due to egg, including baked egg. It is also appropriate for documenting a subsequent anaphylactic event due to egg, including baked egg, that occurs after the initial diagnosis and treatment.

• Ensure documentation clearly specifies anaphylaxis due to egg and explicitly mentions reactivity to baked egg.
• Verify that the encounter is indeed "subsequent" to the initial diagnosis or treatment of this specific anaphylactic event.
• Always sequence this code after any codes for the acute anaphylactic event (e.g., T78.0XXA for initial encounter if applicable).