Professional Affiliations:

Board-Certified: American Board of Pediatric and Adult Allergy & Immunology, American Board of Pediatrics
Fellow: American Academy of Allergy, Asthma & Immunology; American College of Allergy, Asthma & Immunology
Fellowship: Adult & Pediatric Allergy & Clinical Immunology, University of California School of Health Sciences, Los Angeles, CA
Residency: Pediatrics, Children’s Hospital of Northern California, Oakland, CA; Kaiser Permanente Hospital, Oakland, CA
Internship: Family Practice, San Bernardino County General Hospital, San Bernardino, CA
MD: University of Maryland School of Medicine, Baltimore, MD
Former Captain: Medical Corps, United States Air Force
Associate Clinical Professor: Department of Medicine – Division of Allergy & Immunology, University of California, Irvine, CA (1986 to present)
Member: American Association for Clinical Immunology & Allergy, American Academy of Pediatrics, Joint Council of Allergy & Immunology, California Society of Allergy & Immunology (2009 president), Orange County Society of Allergy & Immunology, California Medical Association, Orange County Medical Association

Mark S. Sugar, M.D., FAAAAI, FACAAI

“My interest in the field of allergy began in the early 1980s when the awakening field of immunology provided an understanding of the causes of many allergic diseases. I had previously had several years of training in family medicine and pediatrics in the US Air Force and in the US Public Health Services, but I wanted to enhance my knowledge of the exciting new field of immunology and allergy. I completed a fellowship in this specialty at UCLA in 1985 and opened an office in private practice in Orange County thereafter. I have been active in local and state allergy societies over the years and most recently have served as president of the California Society of Allergy and Immunology (2009). For 25 years I have been an associate clinical professor at UCI teaching residents and fellows in the department of allergy-immunology.

“My passion and inspiration have been practicing medicine and I continue to love the most important work I do, caring for patients of all ages with allergies and immune system disorders. My goals are always to understand my patients’ problems, find solutions to their often challenging allergic disorders and provide them with long-lasting relief of their symptoms so they can enjoy active, worry-free lives.”



What's New

Allergy and Asthma Associates has established the Food Allergy Center, the first and only one of its kind in Orange County, to focus exclusively on the diagnosis and now treatment of food allergy. We are now offering oral immunotherapy. The purpose of oral immunotherapy (OIT) is to decrease your sensitivity to allergy-causing foods, so that exposure to the offending food (peanut, milk, egg, tree nuts etc.) will result in fewer and less severe symptoms in the event of an accidental exposure.


What Our Patients Say About Us

  • When I first got diagnosed with asthma it started off as exercised induced but throughout the years it became worse than that. Just a wind would make me feel like I needed to take my inhaler, a change in the weather and I had to take a breathing treatment. It was really hard especially for being an athlete, because you don’t want anything holding you back from what you love to do...


Two Locations to Serve You!


27800 Medical Center Road
Suite 244
Mission Viejo,
CA 92691

Allergy & Asthma Associates of Southern California Map

15785 Laguna Canyon Road
Suite 100
CA 92618

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