Attending Physician

Associate Professor of Pediatrics, Keck School of Medicine of USC
  • Summary
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Dr. Ong completed his Allergy training in one of the top institutions in the nation: National Jewish Health. He has since been in Allergy practice for 20 years. He has been an expert advisor for NIH (National Institute of Health), CDC (Center for Disease Control and Prevention), Asthma and Allergy Foundation of America, National Eczema Association and Global Parents for Eczema Research in the areas of eczema, infection and food allergy. He has also published widely in these areas.  His article on eczema and infection in New England Journal of Medicine remains to be one of the most cited papers in eczema (atopic dermatitis). He enjoys patient interaction and applying current knowledge to clinical practice.

To discuss your child's eczema and allergy problems, contact Dr. Ong at the main CHLA numbers or at the Arcadia office Phone: 626-795-7177 Fax: 626-357-4052

Clinical Interests

eczema (atopic dermatitis), food allergy, asthma and immunodeficiency


Medical School: 

Loma Linda University School of Medicine


White Memorial Medical Center, Los Angeles


National Jewish Health, Denver



Pediatrics: American Board of Pediatrics; Allergy & Immunology: American Board of Allergy & Immunology

Professional Memberships: 

American Academy of Allergy, Asthma and Immunology; American College of Allergy, Asthma and Immunology; American Academy of Pediatrics


Saban Research Institute Clinical Research Award, Childrens Hospital Los Angeles, 2004; The American Academy of Allergy, Asthma and Immunology Fujisawa Health Care Allergic Skin Diseases Research Award, 2001


Wang V, Boguniewicz J, Boguniewicz M, Ong PY. The infectious complications of atopic dermatitis. Ann Allergy Asthma Immunol. 2021 Jan;126(1):3-12.

Ong PY. The PATHOGENesis of Food Allergy. Front Pediatr. 2019 Nov 21;7:484. doi: 10.3389/fped.2019.00484.

Fishbein AB, Silverberg JI, Wilson EJ, Ong PY. Update on Atopic Dermatitis: Diagnosis, Severity Assessment, and Treatment Selection. J Allergy Clin Immunol Pract. 2020 Jan;8(1):91-101.

Eigenmann PA, Beyer K, Lack G, Muraro A, Ong PY, Sicherer SH, Sampson HA. Are avoidance diets still warranted in children with atopic dermatitis? Pediatr Allergy Immunol. 2020 Jan;31(1):19-26.

Ong PY, et al.. Endogenous antimicrobial peptides and skin infections in atopic dermatitis. N Eng J Med 347:1151-1160, 2002.

Research Interests: 

New treatments for atopic dermatitis/eczema, food allergy and asthma.

4650 Sunset Blvd.
MS #75
Los Angeles, CA 90027
Phone: 323-361-2501Office
Fax: 323-361-1191Fax

468 E. Santa Clara St.
Arcadia, CA 91006
Phone: 626-795-7177Office
Fax: 626-357-4052Fax