Meet Our St. Louis Allergy Providers
At Allergy and Asthma Consultants, Dr.Onder and Dr. Cajigal are committed to providing patients with the latest cutting edge allergy and asthma treatments. To find out more about their clinical research in allergy and asthma, please visit Midwest Clinical Research site at www.stlouisresearch.com.
Robert F. Onder, MD
“My brother had severe asthma as a child and young adult, and that inspired me to choose medicine because it was a field in which I could apply my interest in science in a way that could directly help people. I always enjoy caring for asthma and allergy patients because we make people feel better and improve their quality of life. I believe it is important to get to the root of the patient’s problem and to not only treat symptoms. To deliver quality, personalized healthcare, I’ve become a better, more careful listener. In training, there is a precise ‘right way’ to approach every patient. In my practice, I’ve embraced the philosophy that care must be individualized.”
Board-Certified: American Board of Allergy & Immunology
Fellow: American College of Allergy, Asthma & Immunology; American Academy of Allergy, Asthma & Immunology
Fellowship: Allergy & Clinical Immunology, Washington University/Barnes Hospital & Children’s Hospital, St. Louis, MO
Residency: Washington University, St. Louis, MO
Internship: Washington University/Barnes Hospital, St. Louis, MO
Medical Degree: Washington University School of Medicine, St. Louis, MO
American College of Allergy
Asthma & Immunology
American Academy of Allergy
Asthma & Immunology
Missouri State Medical Association
St. Charles County Medical Association
Assistant Professor of Clinical Medicine
Washington University School of Medicine, St. Louis, MO
Dr. Onder and his wife, Allison, have six children. In his free time, Dr. Onder enjoys hunting, sailing, and triathlon training.
Sonia Cajigal, MD
“Allergies are so prevalent and impact many people on a regular basis. As someone with allergic rhinitis, myself, I know how severely it can affect a person’s day to day living. I am lucky to have found a specialty where there is a lot we can offer patients and improve their quality of life. I enjoy treating patients of all ages and am interested in all aspects of allergy and immunology, including eczema, hives, asthma, food allergy and immunodeficiency.”
Board-Certified: American Board of Internal Medicine
Board-Eligible: American Board of Allergy & Immunology
Fellowship: Allergy & Clinical Immunology, Henry Ford, Detroit, MI
Residency: Internal Medicine, Case Western MetroHealth, Cleveland, OH
Medical Degree: University of Missouri – Kansas City
American College of Allergy Asthma & Immunology
American Academy of Allergy Asthma & Immunology
Dr. Cajigal is a St. Louis native who enjoys baking, traveling and spending time with her husband and daughter.
Jaclyn Hey, FNP
Jaclyn Hey is a board-certified family nurse practitioner who specializes in allergy, asthma, and immunology. Beginning her nursing career in 2005, Jaclyn has worked in a variety of settings which included time in both the emergency room and urgent care. She completed her Master of Science in Nursing at the University of Missouri-Saint Louis in 2013 and is certified by the American Association of Nurse Practitioners. She is also a certified asthma educator.
“I have been working in the specialty of allergy and asthma since 2014 and have seen how proper treatment of these conditions can change a person’s life. I enjoy being able to make a positive impact on my patients’ health.”
In her free time, Jaclyn enjoys cooking and spending time with her husband and two children.
Master of Science, Nursing
University of Missouri-St. Louis
Bachelor of Science, Nursing
University of Missouri-St Louis
Associate of Science, Nursing
Saint Charles Community College
Licensure and Certifications
Advanced Practice Registered Nurse (APRN)
State of Missouri
Family Nurse Practitioner
American Association of Nurse Practitioners
Registered Nurse (RN)
State of Missouri
Certified Asthma Educator
I wanted to feel better, but I didn’t want to give up my pets. A few weeks after Day 1 allergy relief, I can breathe again.Elizabeth R.
As a busy mother with young children, I didn’t have time for traditional allergy shots. But when I found out I could get better after just one half-day allergy therapy, I was sold. My stuffiness has gone away, and my eyes aren’t puffy. I recommend this to all my friends.Allison K.
I had a miserable spring last year, but this year, after Day 1 allergy relief therapy, I was able to go outside again to bicycle and run. This is great!John V.
I suffered from allergies for years, but I always thought allergy shots took too long to work. But now, one week after Day 1 allergy relief, I feel great. I should have done this years ago.Thomas M.