Edmundo Rodriguez-Frias, MD

Edmundo Rodriguez-Frias, MD

6812 State Route 162, Suite 204, Maryville 62062

General info

Dr. Rodriguez-Frias is licensed and board certified in gastroenterology.  He received his MD from the Universidad Peruana Cayetano Heredia (UPCH) one of the top universities in Lima, Peru.  He performed his residency at University of Texas Southwestern in Dallas, Texas.  He went on to complete a Fellowship in Gastroenterology at the University of Louisville in Kentucky.

He has been working in the region since 2008 and most recently worked at St. John’s Hospital in Springfield, Illinois, in the department of Gastroenterology.

He maintains memberships with:

  • American College of Physicians
  • American Medical Association
  • American Society of Gastrointestinal Endoscopy
  • American Gastroenterology Association
  • American Association for the study of Liver Disease


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Tonya Bosaw, FNP-C

Bosaw Tonya NPTonya Bosaw FNP-C began her career as a registered nurse in 2001, in which she received her BSN from Deaconess College of Nursing. She has spent the last 15 years working as a registered nurse in the GI endoscopy lab at St. Anthony’s Healthcare in Alton, Il. Prior to her GI experience, she also has a background in Surgical Services and telemetry.

In 2017, she decided to further her nursing career as a Nurse Practitioner. She attended Maryville University from 2017-2020. She graduated Summa cum Lauda in May 2020 and passed the American Association of Nurse Practitioner (AANP) boards shortly afterwards. She has now brought her GI experience to join with Anderson Medical Group Gastroenterology services.

Physician Specialties