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Due to inclement weather, all GSI Offices and Endoscopy Centers will be closed on Monday, 1/26/2026

We will be opening at 11am on Tuesday, 1/27/2026. Outpatient procedures and office appointments scheduled before 11am are being rescheduled. Please call our office at 804-285-8206 to schedule or reschedule your appointment as needed.

Erik Thyssen

, M.D.

Gastroenterologist

About Erik Thyssen, M.D.

Board certified in both internal medicine and gastroenterology, Erik Thyssen, MD, currently sees patients at Specialists in Gastroenterology. He is dedicated to providing high-quality care to those living in and around St. Louis, Missouri.

Dr. Thyssen was born and raised in Denmark. After completing his medical degree, his desire to further his education led him to relocate to the United States and complete his internal medicine training at Michael Reese Hospital in Chicago, Illinois. He then completed his gastroenterology fellowship at Washington University in St. Louis, Missouri.

At Specialists in Gastroenterology, Dr. Thyssen sees adults with gastrointestinal disorders and uses endoscopic techniques in early detection and treatment.

Dr. Thyssen and his wife, Carin, have three sons. Outside of work, he enjoys playing tennis and watching his wife perform on stage.

Request An Appointment

If you are experiencing a medical emergency, please call 9-1-1. This form is intended for non-urgent appointment requests only. Our office will handle non-emergency requests within 48 hours.