Physician Profiles


The Affiliated Physicians of Suite 118 include:


Mark C. Chien, M.D.

Dr. Chien is a board-certified doctor specializing in internal medicine. He completed his medical education and residency at the University of Illinois.
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Noel A. DeBacker, M.D

Dr. DeBacker is experienced in the private practice of General Internal Medicine in a university setting, where he helps guide patients through the sometimes perplexing maze of the 21st century medical system.
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Charles D. Dillon, M.D.

Dr. Dillon practices general internal medicine with an emphasis on preventive medicine, treatment of cardiovascular disease, hypertension, high cholesterol, diabetes, asthma, allergies, cancer screening and osteoporosis.
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Andrew B. Repasy, M.D.

Dr. Repasy is a board-certified doctor specializing in internal medicine. He is also the Clinical Assistant Professor of Medicine, at the Feinberg School of Medicine at Northwestern University.
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Michael A. Ruchim, M.D.

Dr. Ruchim’s practice involves all aspects of gastroenterology. This includes disorders of the esophagus, stomach, liver, pancreas, gallbladder and colon. His office hours on Mondays and Wednesdays are available by telephoning our office reception staff.
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James H. Sipkins, M.D.

Dr. Sipkins is a board-certified doctor specializing in Internal Medicine. He is a Clinical Assistant Professor of Medicine at Northwestern’s Feinberg School of Medicine.
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