Personalized Allergy Care For You & Your Children

Dr. Sonia Cajigal, MD

Board-Certified Allergist & Immunologist in St. Louis, Missouri

St. Louis Family Allergist Dr. Sonia Cajigal
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About Dr. Cajigal

Dr. Sonia Cajigal is a St. Louis native. She is familiar with the area and, of course, the allergies that come with it. Having suffered from allergies herself, she understands how prevalent St. Louis allergens are and how much of an impact they can have on day-to-day comfort and well being. Dr. Cajigal enjoys treating adult and pediatric patients of all ages and feels grateful to have found a specialty where there is a lot that can be done to improve her patients’ quality of life. As a part-time clinical researcher, Dr. Cajigal makes it a point to keep up with the latest in her field, and is always looking for the most cutting edge procedures, testing methods, and symptom management techniques to help her patients live happier, healthier lives.

See what her patients have to say in the testimonials below!

Dr. Cajigal’s Specializations

Nasal Allergies • Allergic Rhinitis • Skin Allergies • Eczema • Hives • Food Allergies • Eye Allergies • Drug Allergies • Asthma • Immunodeficiency • Allergy Testing • Allergy Shots • Biologic Therapy

Dr. Sonia Cajigal’s Credentials

Medical School

  • University of Missouri – Kansas City – Graduated 2010


  • Case Western MetroHealth – Internal Medicine – 2010-2013


  • Henry Ford Health System – Allergy & Immunology – 2014-2016


  • Diplomate of the American Board of Allergy & Immunology
  • Diplomate of the American Board of Internal Medicine
  • Fellow of the American Academy of Allergy Asthma and Immunology

Professional Organizations

  • American College of Allergy, Asthma, and Immunology (ACAAI)
  • American Academy of Allergy Asthma and Immunology (AAAAI)

Hospital Affiliations

  • SSM Health St. Louis
  • Mercy Hospital St. Louis
Scenic park along the river in St. Louis

Patient Testimonials

“Great listener”

“Dr Cajigal is a great listener. She trusts her patients instead of treating them as if they are not the experts of their own bodies. I really appreciate that (many doctors do not have that quality). She also immediately treats the symptoms instead of waiting to see if things clear. I use her for my children and myself. We have never left her office feeling as if it was a waste of time.”

– Stephanie, August 2020

“Excellent doctor and amazing staff!”

– Janna H, August 2022

She listened and was very thorough in diagnosing my problems. “Had my first appointment with Dr. Cajigal. She’s wonderful. A different doctor had said there wasn’t much I could do for my allergies, except maybe move out of state. I was desperate and came to the doctor for help. She listened and was very thorough in diagnosing my problems. I’m not better yet but I’m very pleased with how this appointment went and I’m optimistic about my health!” – Rosana B, 2022
“Great listener and very caring.” – Stephanie, September 2022

“Great allergist!”

– Ann H, December 2018

“She is the best.”

– Stephen W, June 2020

“Really cared about how I was feeling”

“Dr. Cajigal was friendly, professional, and informative. She took the time to explain the tests and what was going on with my allergies. She is so knowledgeable and really cared about how I was feeling. I would highly recommend this practice if you suffer from allergies and asthma.”

– Sue D, July 2020

Dr. Cajigal is the kind of medical professional every doctor should emulate “I am happy to report that I am now hive-free and I hope that I never again have to endure this extreme discomfort. But if I do, I know exactly to whom I would turn: Dr. Cajigal at STL Family Allergy. I highly recommend her for all of your allergy/immunology needs. Her offices are spotlessly clean. Staff is friendly and helpful. And Dr. Cajigal is the kind of medical professional every doctor should emulate.” – Mary M, September 2022
So happy I found this office/doctor! “This office was AMAZING! I am so very impressed. I have never had more of a thorough doctor. The office staff was great too. I brought a newborn in and they all treated the situation of me having my baby there great. She made sure to lay everything out on the table of what could be the cause of my symptoms. She was so helpful. I also called because my shortness of breath were getting worse and the front desk and doctor made sure to handle it right away and get me over some medicine to help. I’m very impressed and so happy I found this office/doctor!” – Rachel M, 2022
Dr. Cajigal is the best. “Dr. Cajigal is the best. We’ve been seeing her for the last 4 years, having young children with allergies is scary. I have always felt listened to and not made to feel like any question is dumb.” – Amy D, 2022

Dr. Cajigal is Accepting New Patients

We’re here to help you and your children get to the bottom of your symptoms and thrive over allergies, asthma, and immunodeficiency disorders. Schedule your visit with St. Louis Family Allergy today!

Schedule Your Visit

We are currently accepting new adult and pediatric patients at St. Louis Family Allergy!

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