A member of our Naperville Internal Medicine Department since 1989, Dr. O'Leary is originally from Niskayuna, New York. An experienced Internist, he has special clinical interests in diabetes, hypertension and heart disease.
Dr. O'Leary received his medical degree in 1985 from Northwestern University Medical School. He completed his Residency in Internal Medicine at Northwestern Memorial Hospital. He also completed a Fellowship in General Internal Medicine at Northwestern Memorial Hospital.
Dr. O'Leary is a member of the American College of Physicians, the American Society of Internal Medicine, and the American Medical Association. He is affiliated with Edward Hospital and Good Samaritan Hospital.
A member of our Naperville Internal Medicine Department since 1989, Dr. O'Leary is originally from Niskayuna, New York. An experienced Internist, he has special clinical interests in diabetes, hypertension and heart disease. 
