Wahid Kassar, MD
Endocrinologist
7447 W Talcott Ave Ste 467
Chicago, IL 60631
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12 providers
Availability last updated 10/11/2025
Wahid Kassar, MD
Endocrinologist
7447 W Talcott Ave Ste 467
Chicago, IL 60631
Board-certified endocrinologist and internist Nidal Hasan, MD, has been providing innovative and effective treatment solutions for patients affected by hormone-related disorders for more than two decades. At Optimum Endocrine Care, his top-rated practice with convenient locations in Calumet Heights, Chicago and Munster, Indiana, he offers a complete menu of services for residents in the greater Chicagoland area.
As an endocrinologist who specializes in diabetes management, Dr. Hasan believes his primary role is to give his patients the education, advice, care, compassion, and support they need to achieve optimal health. Working alongside a team of diabetes experts, including qualified nurses and certified dietitians, he strives to deliver the kind of care that promotes long-term health and optimal wellness for all patients.
To deliver consistent, high-quality care, Dr. Hasan takes a personalized treatment approach that emphasizes strong, one-on-one relationships with his patients.
Dr. Hasan earned his medical degree from Damascus University-Faculty of Medicine in Damascus, Syria, where he graduated among the top 1% of his class in 1990. After finishing his residency training in internal medicine at Georgetown University Medical Center in Washington, he completed his fellowship training in endocrinology, diabetes, and metabolism at the University of Illinois College of Medicine at Chicago.
Dr. Hasan is dual board-certified by the American Board of Internal Medicine in both internal medicine and endocrinology, diabetes, and metabolism. He’s affiliated with Advocate Trinity Hospital in Chicago and Franciscan St. Margaret Health-Hammond in Hammond, Indiana.
Dr. Nidal Hasan, MD
Endocrinologist
11528 W. 183rd Pl
Suite 1 NE
Orland Park, IL 60467
As a kind, gentle, and thorough physician, N Hasan, MD is confident he can give you the results you want at Cosmetico MedSpa, which serves the community in and around Munster, Indiana and Orland Park, Illinois. When it comes to cosmetic treatment, he exceeds his patients' expectations every time and has developed a loyal customer base who return to the medspa for regular treatments.
Dr. Hassan provides various cosmetic treatments, including botulinum toxin, dermal fillers, laser hair removal, tattoo removal, and skin lightening. He also offers the highly innovative and effective microneedling with PRP treatment to improve the look of your skin. As a full-service medspa, assistance with weight loss is available, too.
Dr. Hassan is board-certified in internal medicine and endocrinology, and he is also trained in cosmetic medicine. He received his medical degree from Damascus University School of Medicine in Syria. He then traveled to the United States to complete his residency at the Veterans Administration Medical Center associated with Georgetown University in Washington, DC. Dr. Hassan completed his fellowship in Endocrinology at the University of Illinois at Chicago.
To better serve his diverse community, Dr. Hassan is fluent in Spanish, Arabic, and English.
Dr. Nidal Hasan, MD
Endocrinologist
11528 W 183rd pl
Suite 1NE-B
Orland Park, IL 60467
Board-certified endocrinologist and internist Nidal Hasan, MD, has been providing innovative and effective treatment solutions for patients affected by hormone-related disorders for more than two decades. At Optimum Endocrine Care, his top-rated practice with convenient locations in Calumet Heights, Chicago and Munster, Indiana, he offers a complete menu of services for residents in the greater Chicagoland area.
As an endocrinologist who specializes in diabetes management, Dr. Hasan believes his primary role is to give his patients the education, advice, care, compassion, and support they need to achieve optimal health. Working alongside a team of diabetes experts, including qualified nurses and certified dietitians, he strives to deliver the kind of care that promotes long-term health and optimal wellness for all patients.
To deliver consistent, high-quality care, Dr. Hasan takes a personalized treatment approach that emphasizes strong, one-on-one relationships with his patients.
Dr. Hasan earned his medical degree from Damascus University-Faculty of Medicine in Damascus, Syria, where he graduated among the top 1% of his class in 1990. After finishing his residency training in internal medicine at Georgetown University Medical Center in Washington, he completed his fellowship training in endocrinology, diabetes, and metabolism at the University of Illinois College of Medicine at Chicago.
Dr. Hasan is dual board-certified by the American Board of Internal Medicine in both internal medicine and endocrinology, diabetes, and metabolism. He’s affiliated with Advocate Trinity Hospital in Chicago and Franciscan St. Margaret Health-Hammond in Hammond, Indiana.
Dr. Nidal Hasan, MD
Endocrinologist
9013 Indianapolis Blvd
Highland, IN 46322
Wahid Kassar, MD
Endocrinologist
900 S Frontage Road Ste 375
Woodridge, IL 60517
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