Our mission is to provide patient-centered care for allergies and asthma.


Fremont, Oakland, Sunnyvale, CA

Yan Yan, MD, is a board-certified allergist and pediatrician providing dedicated care to her patients at Columbia Asthma & Allergy Clinic in Fremont and Redwood City, California.

Dr. Yan, who was born and raised in China, attended Nanjing University of Chinese Medicine in Jiangsu Sheng, China, before moving to the United States. She then earned her graduate degree in human nutrition at The Ohio State University in Columbus, Ohio, and completed her residency in pediatrics and a fellowship program in allergy and immunology, both at State University of New York Downstate Health Sciences University in Brooklyn, New York.

In 2018, Dr. Yan joined the team at Columbia Asthma & Allergy Clinic, where she treats patients of all ages. She uses evidence-based medical practices and also incorporates her training in nutrition and alternative medicine to provide holistic and comprehensive care to all of her patients.

Do You Suffer From Allergies?

Don’t let allergies run your life. Talk to a Columbia Allergy clinic today to find relief.

Monica H.
“First time at allergy specialist they really care about my kids lifestyle they care more about their patients that their wallet. Now days that's a keeper. ”
David W.
“Adam and the staff were great at considering my concerns, explaining my results and listening to my questions. Plus everyone was on time and things moved swiftly. ”