Anaphylactic shock, unspecified, sequela

This code signifies the long-term effects or complications arising from a past episode of unspecified anaphylactic shock. It indicates that the acute anaphylactic event has resolved, but the patient continues to experience residual health problems directly attributable to that severe allergic reaction.

Use this code when documenting conditions such as chronic organ damage, persistent neurological deficits, or ongoing respiratory issues that are a direct consequence of a previously experienced anaphylactic shock, where the specific cause of the shock was not identified. It is appropriate for follow-up encounters addressing these lasting sequelae.

• Always sequence this code after the code for the specific sequela being treated (e.g., chronic asthma due to anaphylaxis).
• Ensure documentation clearly links the current condition to a past anaphylactic shock.
• Do not use for acute anaphylactic shock; this code is exclusively for the late effects.