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Gastroenterologist
121 Saint Luke's Center Drive
Suite 406, Building A
Chesterfield, MO
63017
Top reviews
I had not met Dr Haas prior to my procedure. He was filling in for a doctor who had an early delivery. He was very communicative, great bedside manner, answered all my questions before and after. I did not feel rushed to “get it dShow moreone”. I miss Dr. Williams (all the best in retirement), but Dr. Haas was great and I’ll see him in 5 years! Thank you
Dr Hass is excellent. Explained everything well. Took the time to answer all my questions. Very caring and compassionate and easy to talk to. Helped me make some difficult decisions. I would highly recommend him to anyone with anyShow more GI concerns.
Jason Haas, D.O. is dedicated to providing the highest quality of care to all his patients. He has strong communication skills which allow him to connect with patients, staff and colleagues.
For the past eight years, Dr. Haas has been a gastroenterologist practicing in Springfield, Missouri with Cox Medical Clinic. He is a board-certified gastroenterologist that completed his GI Fellowship training at Aurora Health Care in Milwaukee, WI and his Internal Medicine Residency at Gundersen Health Care in LaCrosse, WI.
His wife is from. St. Louis, and in their spare time Dr. Haas enjoys traveling with her and their two daughters. Dr. Haas has been a member of the Colorectal Awareness Party in Springfield, which helps raise money and provide free colonoscopy evaluations for patients in need.
Abdominal Pain
Acid Reflux
Barrett’s Esophagus
Capsule Endoscopy
Celiac Disease
Colon Cancer Screening
Colonoscopy
Conditions
Constipation
Crohn’s Disease
Diarrhea
Double (Bi-Directional) Endoscopy
Eosinophilic Esophagitis
Fatty Liver
FibroScan
Fructose Intolerance Testing
Hemorrhoids
Hydrogen and Methane Breath Testing
IBD
IBS
Infusion Services
Lactose Intolerance Testing
Liver Disease
Research
Services
Small Intestinal Bacterial Overgrowth (SIBO)
Ulcerative Colitis
Upper Endoscopy
Locations (2)
Gateway Gastroenterology
121 Saint Luke's Center Drive
Suite 406, Building A
Chesterfield, MO, 63017
Gateway Gastroenterology
12855 N. 40 Drive
Suite 150, South Tower
Saint Louis, MO, 63141
More About Dr. Andrew Su, MD
Practice
Specialties
Insurance
NPI Number
1962402925
Provider's Gender
Male
Reviews
Very good very thorough and my nurses and doctor haas were very nice so thank you for taking care of me.
Dr Haas was very pleasant to talk to. He was very informative about my procedure, before and after. If I need similar procedures in the future, I would definitely try to come back to Dr Haas. He was great.
Dr Hass is excellent. Explained everything well. Took the time to answer all my questions. Very caring and compassionate and easy to talk to. Helped me make some difficult decisions. I would highly recommend him to anyone with any GI concerns.
Excellent procedure from start to finish.
He was super helpful!
Very professional and felt confident with Dr. Haas. I would recommend him
Dr. Haas was very good at explaining the situation and the importance of diet. He helped me by setting realistic goals I feel I can accomplish.
Very nice, great bed side manner.
I had not met Dr Haas prior to my procedure. He was filling in for a doctor who had an early delivery. He was very communicative, great bedside manner, answered all my questions before and after. I did not feel rushed to “get it done”. I miss Dr. Williams (all the best in retirement), but Dr. Haas was great and I’ll see him in 5 years! Thank you
Great communication, efficient and everything running on time! Staff very friendly and professional. My nurse, Nikki, was excellent! Give that girl a raise!!
Everyone and everything was wonderful!
Dr. Haas was comforting. Although I just met him a few minutes before and after waking from the procedure, he spoke with me and my husband like he’d known and cared about my health for a long time.
The whole team was very very great! Very friendly, very friendly and they took very good care of me. I would recommend anyone to Dr. Hans.
The staff was friendly and professional, from the receptionist to the doctor, all answered my questions thoroughly. When the anesthetist was talking to me she made me feel at ease and unstressed. The procedure was efficiently managed. I highly recommend this clinic to anyone needing an endoscopy. Thank you
Fantastic experience. Everyone one super nice and polite Great job to all
Very satisfactory
Dr. Haus is a very knowledgeable and caring physician. He listens attentively and offers excellent suggestions that can change the way you feel significantly and helps you feel more control of your issues.
Great bedside manner Easy to talk too and very informative with the results of your procedure
Danielle is my NP. She is the best ever !! Very caring , very smart , pt care centered . Listens , makes sure all your questions are answered. Grateful I have her to help manage my care .
Thorough yet quick
First trip there..dr Jason Hass seemed very passionate about helping me with my stomach issues..so very glad I came.
Dr. Hass was very kind and explained everything. Before leaving he came back in to make sure I was doing ok. Everyone was very caring and efficient that worked with him.
My first colonoscopy went very well! I had the best experience with Dr. Haas. Any anxiety I had arriving was completely gone when speaking with the staff and the doctor. Fully recommend this place.
Easy doctor to speak with and very well in upper endoscopy procedure. Overall excellent doctor. Thanks again.
Very open minded. She was considerate concerning the need for a therapeutic plan of health and healing.
She was very efficient and quick.
Answered all questions, really helped me understand my problem. Also, read all scan reports I had brought w/me. Would very much recommend this NP and the courtesy & interest given me.
Follow up for a colitis flare up, went very well, generic Delzicol seems to be helping me into remission, getting some stool sample test instead of colonoscopy, Feeling normal now, This whole practice is a well oiled machine, Dr, Haas is easy to deal with and has succeeded in managing my case. highly recommend. Thankyou Dr, Haas and your very capable staff.
She was very understanding and knowledgeable.
It was as expected. Some of my frustrations were addressed
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