Anaphylactic shock, unspecified, subsequent encounter

This code signifies a severe, life-threatening systemic allergic reaction that has progressed to shock, where the specific cause of the anaphylaxis is not documented. The "subsequent encounter" indicates that the patient is receiving follow-up care for this condition after the initial treatment phase.

Use this code when a patient presents for ongoing management, monitoring, or treatment of anaphylactic shock of an unknown etiology, after they have already received initial care for the acute event. This would include scenarios such as follow-up appointments to assess recovery, manage lingering symptoms, or investigate the cause of the reaction.

• Ensure documentation clearly states "anaphylactic shock" and that the encounter is for follow-up care.
• Only use this code when the specific allergen or cause of the anaphylaxis is not identified.
• Always look for more specific codes if the cause of the anaphylactic shock is known (e.g., due to food, drugs).