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Dr. Sokun Ky Bhatti, MD

Dr. Sokun Ky Bhatti is a board certified allergist and immunologist experienced with both adult and pediatric asthma, allergies, urticaria, atopic dermatitis, angioedema and drug allergy. She grew up in the Philadelphia area and attended Villanova University where she graduated Magna Cum Laude in Biology. She then attended Jefferson Medical College in 2000, now Sidney Kimmel Medical College. Following medical school, she completed residency in Internal Medicine at University Hospitals, Case Medical Center in Cleveland, Ohio. She attended Wake Forest University, Baptist Medical Center in North Carolina for her Allergy and Immunology Fellowship. After fellowship she joined the Allergy and Asthma Center of North Carolina where she was a partner prior to moving to the Northeast.

Dr. Bhatti is a Fellow of the American College of Allergy and Immunology and a member of the American Academy of Allergy Asthma and Immunology. She has presented at the national level and is published in scientific literature. She has participated in many clinical trials investigating new agents for severe asthma, atopic dermatitis, and rhinitis. In addition, she has provided media interviews on various allergy and asthma topics. When not at work, Dr. Bhatti splits her time between family and community activities. She participates in community health fairs and school education on various topics in allergy and immunology. She has mentored students interested in the field of Allergy and Immunology. Dr. Bhatti is married and has four children. Her hobbies include reading, art, travel, and gardening. She welcomes patients of all ages and looks forward to providing compassionate, quality care.


Dr. Junfang Jiao, MD, PhD

As a board certified allergist and clinical immunologist, Dr. Junfang Jiao has been trained in the treatment of both adult and pediatric allergic, immunologic and pulmonary related diseases.

Dr. Jiao completed his internal medicine residency at Kingsbrook Jewish Medical Center in New York and allergy and immunology Fellowship at Washington University School of Medicine in St. Louis/St. Louis Children’s Hospital. He also earned a PhD in molecular biology from University of Delaware and had post-doctoral research training in virology and immunology at University of Pennsylvania and Children’s Hospital of Philadelphia.

His areas of expertise include allergic rhinitis and conjunctivitis (hay fever), chronic sinusitis, food and drug allergies, asthma, chronic cough, hives and swelling, atopic dermatitis (eczema), contact dermatitis, stinging insect allergy, anaphylaxis, hypereosinophilia, eosinophilic esophagitis and gastroenteritis, mast cell disorders and primary immunodeficiency. He has a particularly strong interest in asthma, and authored a number of articles in peer-reviewed journals and textbook chapters.

He welcomes patients of all ages and provides service at our Newark (Chestnut Hill) and Middletown offices. His goal is to provide state-of-the-art patient care with a personal touch.


Dr. Gregory Marcotte, MD

Dr. Gregory Marcotte began his private practice of Allergy and Immunology in Wilmington, Delaware in 1997, taking care of patients and their families with all types of allergic diseases.

Dr. Marcotte started college at Cornell University planning to go to veterinary school. After a trip to the emergency room for an allergy attack while working on a dairy farm his freshman summer, he changed majors to Cell Biology. He graduated with Distinction and Honors, and planned for medical school. He spent a year working as a laboratory technician at the Johns Hopkins University Division of Allergy and Immunology. He attended medical school at New York University, did his residency at the University of Colorado/National Jewish Hospital, and then returned to Johns Hopkins to complete his Allergy and Immunology Fellowship. He is board-certified in Adult and Pediatric Allergy and Immunology.

Dr. Marcotte has written several peer reviewed papers, given countless talks to fellow physicians and is involved in training the residents at both the Christiana Care and the St. Francis residency programs. He is currently the Section Chief for the Division of Allergy & Immunology at Christiana Care Health Services System and is past President and member of the Delaware Allergy Society. He is a Fellow of both the American Academy of Asthma, Allergy and Immunology; and the American College of Asthma, Allergy and Immunology and member of the Pennsylvania Allergy and Asthma Association, the American College of Physicians and the American Medical Association.

Dr. Marcotte volunteers time for the American Lung Association of Delaware (serves as medical director for the annual Asthma Camp) and the Food Allergy and Anaphylaxis Network branch in Delaware. He has received multiple awards in Delaware including being voted by his physician peers as one of the Best Allergists in Delaware annually and “Top Doc” of all doctors in all of Delaware in 2009.

Dr. Marcotte is married and has 2 daughters.

Dr. Marcotte’s office staff strives to deliver the best care to patients in a friendly and efficient manner and the office is accepting new patients of all ages.


Dr. Quan Nguyen, MD

Dr. Quan C. Nguyen began his practice in Delaware in 1986, caring for patients and their families with allergy, asthma and immune deficiency problems.

After graduating Magna Cum Laude from Bates College with a BS degree in Math and Chemistry, Dr. Nguyen completed his Medical School studies at the University of Rochester in NY, his Internship and residency at the Johns Hopkins Hospital in Baltimore and his Allergy/Immunology Fellowship at the George Washington Medical Center and The Children’s National Medical Center in Washington DC. He also received Allergy and Immunology training at the National Institute of Health and the Walter Reed Medical Center.

He has won several awards including the ACA fellowship award, the NIH research fellowship award, the American Cancer Society research fellowship award. He was consistently voted Best Allergist in Delaware by his peers.

Beside his clinical practice, Dr. Nguyen has done several clinical studies, and published numerous articles in medical journals. He has been actively involved in teaching of residents and fellows from the Thomas Jefferson Medical College, the A.I. Dupont hospital Allergy and Immunology clinic, the Christiana Care Health Center. He has done Medical Mission to the South East Asia region treating patients as well as training physicians in developing countries on allergy, asthma and respiratory diseases.

Dr. Nguyen is a fellow of the American Academy of Allergy, Asthma and Immunology, the American College of Allergy, Asthma and Immunology, past board member of the DE American Lung Association, the Wilmington New Castle Pediatric Association, member of the Johns Hopkins Medical and Surgical Association, the DE Allergy and Asthma Society, the DE Medical Association, the Wilmington New Castle Pediatric Association, and the Pennsylvania Allergy Association. He is the current President of Asthma and Allergy Care of DE. He is board-certified in both Adult and Pediatric Allergy and Immunology.

Dr. Nguyen is married and has one daughter.

Dr. Nguyen and his caring staff emphasize personalized patient care both in treating and preventing of all allergic and respiratory conditions with special interests in food allergy, drug allergy, exercise-induced asthma, chronic sinusitis and difficult to control Asthma.

Dr. Nguyen’s office welcomes new patients of all ages.


Dr. Michelle Squadrito, MD

Dr. Michelle M. Squadrito is a board-certified pediatrician, fellowship-trained in adult and pediatric Allergy and Immunology. She received her Bachelor’s degree in Microbiology from the University of Maryland and medical degree from Temple University School of Medicine. She completed her residency in pediatrics at St. Christopher’s Hospital for Children and fellowship in Allergy and Immunology at Nemours/A.I. duPont Hospital for Children / Sidney Kimmel Medical College of Thomas Jefferson University. She has presented at the national level and has been published in multiple scientific journals. Dr. Squadrito grew up in the Philadelphia area and currently resides in Wilmington, Delaware with her husband and son. When not at work, Dr. Squadrito enjoys spending time with her family, reading, and cooking. She strives to provide quality and comprehensive care to patients of all ages as part of ENT and Allergy of Delaware.


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