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Availability last updated 10/06/2025
Gregory O. Clark, MD, is an experienced diabetes specialist. He treats patients at Chicago Diabetes Experts located in Buffalo Grove, Illinois. Dr. Clark was diagnosed with Type 1 diabetes at 11 years old, motivating his professional career.
As a teenager, he was rebellious and not well-controlled. In fact, Dr. Clark used to hide bags of Reese's Peanut Butter Cups under his bed and drink milkshakes and apple pies before school. As he grew up, he focused on getting his diabetes under control, eating a healthy diet, and exercising almost every day.
Dr. Clark studied biochemistry in college at the University of California San Diego. He then attended medical school at the University of Southern California in Los Angeles, graduating with the highest distinction.
Dr. Clark first became interested in diabetes-related research and clinical care in medical school. After graduating, he completed his residency in internal medicine and fellowship in endocrinology, diabetes, and metabolism at Johns Hopkins Hospital in Baltimore, Maryland.
Dr. Clark eventually joined the medical school faculty at Johns Hopkins. There, he conducted stem cell research with the hope of curing diabetes and was part of a team that was among the first two groups in the world to make an unlimited supply of stem cell derivatives that produce insulin in response to changing blood glucose levels.
Dr. Clark remained in academic medicine for over a decade, doing diabetes-related research, teaching, and clinical care before founding Chicago Diabetes Experts in 2013. At the practice, Dr. Clark's goal is to help each patient understand how best to manage their own diabetes while supporting the individual as they work together to find the calm in this disease storm.
Dr. Clark wants to help you become your own diabetes expert!
Dr. Gregory Clark, MD
Endocrinologist
355 W Dundee Rd
Suite 110
Buffalo Grove, IL 60089
Michael Magidow, MD, PhD
Family Physician
555 Mchenry Rd,
Wheeling, IL 60090
Dr. Mina Paiman, MD
Family Physician
2634 Patriot Blvd
Suite C
Glenview, IL 60026
Parisa Samsami, DC
Family Physician
240 Saunders Rd
Riverwoods, IL 60015
