We are accepting all major insurance including Anthem BCBS!

Patient Reviews

Finding a provider who will truly listen to your concerns is not always easy. Here at Specialists in Gastroenterology, our patients are always our top priority. Our gastrointestinal providers create a thoughtful, caring environment where you can feel heard and all of your GI concerns are addressed. You can trust us to provide you with customized care for you and your condition. Feel free to browse through our reviews, so that you can see for yourself the time and dedication that our specialists give to each one of our patients in the St. Louis, MO community.

5.0 Review from K.P. Source: Google Oct 26 2022

"Dr Thyssen is a compassionate and friendly physician. He took the time to explain everything to my mom and myself, and made us feel comfortable with the upcoming procedure. The employees at SIG were all easy to deal with, understanding and made my mom's experience comfortable and stress free. SIG has appointments and procedures all in one building which makes for ease of patient care. There's no running the gauntlet of hospital corridors, registration and bouncing from one area to another. I would highly recommend Dr Thyssen and his staff."

5.0 Review from S. Source: Google Oct 26 2021

"Dr. Thyssen is an OUTSTANDING doctor - the best! He is knowledgeable, his diagnoses always right on the mark and his skill impeccable. He is also a compassionate and caring doctor, a rarity in today's medical field. I would highly recommend him."