Daryn Abraham, M.D. is a board certified allergist-immunologist trained in the treatment of adult and pediatric patients. He is a graduate of Loyola University Chicago Stritch School of Medicine. He completed his residency and fellowship at Northwestern University Medical School and Children’s Memorial Hospital in Chicago. He acted as a Chief Allergy Fellow during his stay at Northwestern. He is board certified by the American Academy of Allergy and Immunology and the American Board of Internal Medicine. He is a member of the American College of Allergy, Asthma, and Immunology and the American Academy of Allergy, Asthma, and Immunology. He has published numerous research articles and was awarded The Alan R. Feinberg, MD. Memorial Resident-Fellow Program Award by the Illinois Society of Allergy, Asthma, and Immunology in 2002.He enjoys treating patients of all ages. His clinical interests include allergic rhinitis, asthma, sinusitis, eczema, food allergies, stinging insect allergy, hives, angioedema, and drug allergies. He sees patients in both the Carol Stream and St. Charles office. He has staff privileges at Central Dupage Hospital and Delnor Hospital. 

Leah Pieczynski, is a board certified Physician Assistant who graduated with a Masters of Medical Science in Physician Assistant Studies from Midwestern University in Downers Grove, IL.  She joined our practice in August 2014 after working for twelve years in General Pediatrics.  She is well versed in treating patients with allergic rhinitis, asthma, eczema, hives, and sinusitis.  Leah has also worked part-time as an adjunct faculty member at her alma mater, Midwestern University, teaching PA students physical examination skills and facilitating Clinical Medicine case groups.  When not working, Leah cares for her son and daughter, ages 7 and 5 at their home in Elmhurst, IL.  Her hobbies/interests include fitness, photography, and travel.