477.1
ICD-9-CMThis code signifies an inflammatory condition of the nasal passages, characterized by symptoms such as sneezing, rhinorrhea, nasal congestion, and itching, specifically triggered by exposure to food allergens. It represents an IgE-mediated hypersensitivity reaction where food acts as the causative agent.
Apply this code when documentation clearly indicates allergic rhinitis symptoms directly attributable to the ingestion or contact with specific food items. This diagnosis requires a confirmed link between food exposure and the onset of nasal allergic symptoms, often supported by patient history, allergy testing, or elimination diets.
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