The 2014 ICD-9 code for allergic rhinitis is 477. It has five designations depending on the cause: 477.0 denotes pollen allergies, 477.1 denotes food allergies, 477.2 denotes dander allergies associated with dog and cat dander, 477.8 denotes other allergies, and 477.9 denotes unspecified causes.
Allergic rhinitis is caused by allergic reactions and results in inflamed mucous membranes in the nasal passages. It can also affect the pharynx, eyes, sinus mucous membranes and the middle ear.
ICD codes are used by organizations and the medical profession to classify diseases. The National Center for Health Statistics is responsible for coordinating classifications of diseases in the United States for the World Health Organization.