477.2
ICD-9-CMThis code signifies an inflammatory condition of the nasal passages caused by an allergic reaction specifically to animal dander or hair, such as from cats or dogs. Patients typically experience symptoms like sneezing, nasal congestion, rhinorrhea, and itchy nose, eyes, or throat upon exposure to these allergens.
Use this code when documentation clearly states a diagnosis of allergic rhinitis and explicitly identifies animal dander or hair (e.g., cat, dog) as the causative allergen. This diagnosis is often supported by patient history of exposure-related symptoms and may be confirmed by allergy testing.
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