Anaphylactic reaction due to eggs, unspecified, sequela

This code signifies a long-term or late-effect complication arising from a past anaphylactic reaction specifically triggered by egg consumption. It indicates that the acute allergic event has resolved, but the patient is now experiencing persistent health issues directly attributable to that prior severe allergic response.

Apply this code when documenting a patient presenting with a chronic condition or sequela that is a direct consequence of a previously experienced anaphylactic reaction to eggs. This would include scenarios where the initial anaphylaxis occurred in the past, and the current encounter addresses a residual problem, such as chronic asthma exacerbated by the prior reaction, or persistent organ damage.

• Requires a seventh character "S" to indicate sequela, meaning the current condition is a late effect of the initial anaphylactic event.
• Do not use for acute anaphylaxis; this code is exclusively for residual conditions after the acute phase has passed.
• Always code the specific sequela first, followed by this code to indicate the underlying cause.