Dr. Brian O'Leary approaches complex health issues with a simple, yet brilliant, solution. By bringing all the clinical expertise, support and resources you need to improve your health under one roof at our Naperville clinic, adults 65 years of age and up have access to all the resources and support you need to lead a healthier, happier life.
Internal Medicine
English
Diabetes, Hypertension, Heart disease
American College of Physicians
American Society of Internal Medicine
American Medical Association
Castle Connolly 2025 Top Doctor
2025
Chicago Magazine, Top Doctors
2022
Chicago Magazine, Top Doctors
2021
Chicago Magazine, Top Doctors
2017
Comments are collected in our Press Ganey Patient Satisfaction Surveys. Patients are de-identified to protect confidentiality and patient privacy. Learn more about our patient satisfaction survey.
Dr. O'Leary is the BEST that Duly has. My only wish is that he was younger.
Dr Brian O'Leary is an excellent physician, very knowledgeable and very honest. I have been with him for 25-30 years and would never dream of switching physicians.
Doctor OLeary is an excellent doctor!!
Went really well
We love Dr O'Leary and can't imagine life without him. He is smart, kind, engaging and an excellent diagnostician. I can't say enough about how lucky we feel to have him. Thank you.
The Patient Satisfaction Rating score is an average of all responses to care provider related questions on our independent rating system, the Press Ganey Patient Satisfaction Survey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Learn more about our patient satisfaction survey.
Patients Seen: Ages 65+
Practices In: Aurora