Anaphylactic reaction due to tree nuts and seeds, subs

This code signifies an allergic emergency characterized by a severe, systemic hypersensitivity reaction to tree nuts or seeds, occurring after the initial treatment phase. It indicates a patient presenting for follow-up care, monitoring, or treatment of residual effects from a previously managed anaphylactic episode caused by these allergens.

Apply this code when a patient returns for subsequent care related to an anaphylactic reaction to tree nuts or seeds. This includes visits for medication refills, allergy testing, management of lingering symptoms, or education following the initial acute event. It is appropriate for any encounter after the initial diagnosis and treatment of the acute anaphylactic episode.

• Ensure the documentation clearly specifies "tree nuts and seeds" as the allergen, not just "nuts."
• Verify the encounter is for follow-up care, not the initial acute presentation, which would require an "A" (initial encounter) or "D" (subsequent encounter) character.
• Always sequence this code after the primary reason for the encounter if the anaphylaxis is not the main focus of the visit.