Chicago Diabetes Experts
Chicago Diabetes Experts

About Chicago Diabetes Experts

At Chicago Diabetes Experts, esteemed physician Gregory O. Clark, MD, and the team use evidence-based medicine to help patients with diabetes live their best lives. Patients anywhere in the Chicago area can visit the Buffalo Grove, Illinois, office, and the practice also offers house calls and telemedicine to make personalized medical care easy and accessible to their patients. 

Chicago Diabetes Experts treat Type 1 and Type 2 diabetes with a personalized approach. The team spends as much time with patients as they need during appointments, and they’re always available between visits to help patients with questions and problems.

Dr. Clark’s life work is helping people with diabetes. As a Type 1 diabetic himself, he has a unique understanding of how the disease affects the body. Through years of extensive medical education and personal experience, he knows how to help his patients face the disease and thrive. 

From medical weight loss using Ozempic® and Mounjaro to nutrition counseling, insulin pump care, and continuous glucose monitoring, Chicago Diabetes Experts helps people with diabetes enjoy the highest quality of life. 

Chicago Diabetes Experts uses a concierge care model in which patients pay an annual fee and get expanded access to personalized medical care. This model skips all the insurance red tape and gives patients plenty of time and attention to manage their disease as best as possible. 

For highly personalized diabetes care that is consistently excellent and never rushed, call Chicago Diabetes Experts or click the online scheduling feature now.

Meet the Provider

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Gregory Clark, MD

Diabetes Specialist

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!


Patients Reviews

Madeline D.
"When I need help at literally any time of the day or night, I can reach Dr. Clark and he will help me with whatever issue I am having."
Parker B.
"Dr Clark has been my Endocrinologist for 13 years. During that time I've had the privilege of spending many hours learning from him."
Jonathan K.
"We adore Dr. Clark! We signed up our 11-year-old son to work with him because of the medical benefits. We knew he had a medical degree, and had worked in research..."
James P.
"Dr. Clark is by far the most enlightened, knowledgeable, and effective endocrinologist I have had, and there were several."

Buffalo Grove

355 W Dundee Rd, Suite 110
Buffalo Grove, IL 60089
Hours Of Operation:
8:00 AM - 5:00 PM
8:00 AM - 5:00 PM
8:00 AM - 5:00 PM
8:00 AM - 5:00 PM
8:00 AM - 5:00 PM