(714) 633-6363
725 W. LaVeta, Suite 100
Orange, CA 92868
Fax: (714) 633-0178
Mark H. Ellis, MD, MPH

Dr. Ellis obtained his BA Degree from Harvard University and his MD, MPH degrees from Tulane School of Medicine and the Tulane School of Public Health. After completing his Pediatric Residency at the University of Arizona Health Services Center, he went on to finish his Allergy-Immunology Fellowship in 1986 at the University of California, Irvine Medical Center. Dr. Ellis is board certified in Pediatrics and in Allergy/Immunology. He is Division Chief of Children’s Hospital of Orange County’s Pediatric Subspecialty Faculty, Division of Allergy & Asthma, is an Associate Clinical Professor of Pediatrics Allergy at UCI, and is an Co-Director of Southern California Asthma Camp since 1994. His professional affiliations include The American Academy of Allergy, Asthma & Immunology, American College of AA&I, California Society of AA&I and Orange County Society of AA&I, where he served as President in 1997 & 1998. He also has a full-time private practice in Allergy, Asthma & Immunology. Dr. Ellis has had much experience in clinical trials for the past 25 years. He has received several awards for his research, as well as having participated in the development of clinical asthma trials and protocols.


Sarah Samimi Field, MD, FAAAAI

Dr. Field obtained her MD degree from St Louis University School of Medicine. She completed her Internal Medicine Residency and her Allergy & Immunology Fellowship at the University of Kansas Medical Center. Dr Field is board certified in both Internal Medicine and Allergy & Immunology. She speaks Farsi as well as English.


Wan-Yin Chan, MD, MS, FAAAAI

Dr. Chan obtained her MD degree from Quillen College of Medicine, East Tennessee State University. She completed her Pediatric Residency and her Allergy & Immunology Fellowship at UCLA Medical Center. She is board certified in both Pediatrics and Allergy & Immunology. Her professional affiliations include The American Academy of AA&I, American College of AA&I, Los Angeles Society of AA&CI, California Society of AA&I and Alpha Omega Alpha Honorary Society. Dr Chan speaks Cantonese as well as English.


Sherwin A. Gillman, MD
1941 – 2016


Dr Gillman was an original founder of the research department, and conducted numerous clinical trials for 40 years. He was a graduate of the University of Wisconsin, and obtained his MD Degree from the University of Illinois Medical School in 1965. He did post graduate training in Pediatric Allergy & Immunology at USC Medical Center after serving in the USAF as Captain. Dr. Gillman was board certified in Pediatrics and Allergy, and served as Emeritus Chief of CHOC PSF, AMC, Division of Allergy, Asthma & Immunology, a multi-specialty group affiliated with Children’s Hospital of Orange County. He was the Co-Director of SCAMP Asthma Camp for the American Lung Association and was chosen as LA Times “Volunteer of Distinction” for service to children.


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