Anaphylactic reaction due to peanuts, initial encounter

This code signifies a severe, systemic allergic reaction (anaphylaxis) specifically triggered by exposure to peanuts. It indicates the patient is experiencing the acute phase of this life-threatening immune response, characterized by rapid onset and potentially affecting multiple organ systems.

Apply this code when documenting the initial presentation and management of a patient experiencing anaphylaxis confirmed or highly suspected to be caused by peanut ingestion or exposure. This is appropriate for emergency department visits, urgent care encounters, or initial hospital admissions for such an event.

• Always assign an additional code for the specific manifestation(s) of anaphylaxis, such as respiratory distress (e.g., J45.901 for acute exacerbation of asthma) or circulatory collapse (e.g., R57.9 for shock, unspecified).
• Ensure documentation clearly links the anaphylactic reaction to peanut exposure.
• For subsequent encounters related to the same anaphylactic event, use the appropriate subsequent encounter (D) or sequela (S) seventh character.