Nadine Abi-Jaoudeh, MD

Dr. Yesim Yilmaz Demirdag is a board-certified UCI Health allergist and immunologist who specializes in the diagnosis and treatment of immunodeficiencies in children and adults, as well as asthma, food allergies and eczema in children.Her clinical interests include urticaria (hives), angioedema (swelling), rhinitis, sinusitis, drug allergies, eosinophilic esophagitis and stinging insect allergies.Yilmaz Demirdag earned her medical degree at Akdeniz University School of Medicine in Antalya, Turkey. She completed residencies in pediatrics at Hacettepe University in Ankara, Turkey, and Louisiana State University Health Sciences Center in Shreveport, where she completed a fellowship in allergy and immunology. She also received fellowship training in clinical cytogenics at the Yale School of Medicine in New Haven, Conn.Her research interests include the genetics of primary immune deficiencies, immune deficiencies in chromosomal abnormalities, eczema and food allergies. Before joining UCI Health, she set up and directed the first pediatric and adult primary immune deficiency clinic at Columbia University Irving Medical Center in New York City. Yilmaz Demirdag, who also speaks Turkish, has devoted herself to providing the best, evidence-based medical care to her patients.

Dr. Matthew D. Whealon is a board-certified UCI Health surgeon who specializes in minimally invasive and robot-assisted colorectal surgery.A fellowship-trained colorectal surgeon, Whealon is an expert in the minimally invasive treatment of colon, rectal and anal cancers, colon and rectal polyps, Crohn's disease and ulcerative colitis, diverticulitis, rectal prolapse and sphincter salvage. He also treats anorectal disorders, including pilonidal cysts and anal fissures, fistulas and hemorrhoids.He earned his medical degree at the UCI School of Medicine, followed by a residency in general surgery at UCI Medical Center. where he served as chief resident and completed a research fellowship in surgery. Next, he completed a fellowship in colorectal surgery at the University of Pennsylvania and Penn Medicine Health System in Philadelphia.Whealon is the author or co-author of many research papers published in major journals, including Surgical Oncology, Surgical Endoscopy, The American Surgeon and Clinics in Colon and Rectal Surgery.