Dr. Choy is a licensed Allergy Immunology in CA. Medical degree obtained from University of Sydney Faculty of Medicine. Completed residency training at Northwestern University and fellowship training at Northwestern University. Currently practices at Welch Pasteur Allergy Medical Group (Welch Pasteur Allergy Medical Group), located at 211 Quarry Rd, Palo Alto, CA 94304. Dr. Choy specializes in Allergic rhinitis, allergic reaction, angioedema, asthma, conjunctivitis, eczema, food allergy, hay fever (allergic rhinitis), urticaria, insect sting allergy, drug allergy, nasal polyposis, non-AIDS-. In addition to English, Dr. Choy speaks Mandarin and Cantonese.