Our History

• Established in 1975 by Dr. Roger Greenlaw, our original office was one of the first office based diagnostic endoscopy labs in the United States.
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• To learn more, click here.

RGA Physicians

• RGA is one of the largest independent Gastroenterology groups in Illinois. Our physicians are all board certified in Gastroenterology and have trained at renowned centers including:
• • Cleveland Clinic
  • Harvard University
  • Indiana University
  • Loyola University Chicago
  • Mayo Clinic
  • Washington University in St. Louis
• Many of our physicians have also received additional training in advanced endoscopic procedures, intensive exposure to specific diseases, and developed special interests, thereby allowing our Center of Excellence to provide the comprehensive care you would expect from a large university center, with the convenience of being close to home. Our advanced nurse practitioners utilize their extensive clinical experience to care for our patients in either the office or hospital settings.
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• To learn more about the conditions we treat, click here.