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Gastroenterologist
121 Saint Luke's Center Drive
Suite 406, Building A
Chesterfield, MO
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
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 manaShow moreged. I highly recommend this clinic to anyone needing an endoscopy. Thank you
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 GO
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
NPI Number
1962402925
Provider's Gender
Male
Reviews
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
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.
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.
I got in on time. She was very thorough with her assessment of me. She explained everything well
Dr. Haas is great. However the office was running an hour late.
Professional and knowledgeable.
I drove 2 hours to asked about 10 questions about how I was & change of med I no longer I take. Sarah was pleasant enough.
Excellent care from Dr Haas and the entire staff. Dr was very kind & compassionate and above all professional. He provided thorough feedback and good counsel. Each of the nurses were excellent in their role and skill. I would recommend this facility and its services ! Thank You!!
Everyone was nice and made me feel at ease!!!
Sarah was knowledgeable and patient. She is a very kind young woman.
Dr. Haas, nurses, medical staff and team members were helpful, efficient, knowledgeable and caring for my procedure this week.
The staff and Dr.Haas were very nice. The whole experience from start to finish was a good one.
Quick and Solid Experience.
She really listens to what you have to say and is very caring!
Dr. Haas has a calm and comforting persona that I did appreciate as I faced my procedure. I felt like I was heard and cared for. The Nursing Staff was amazing too, for the same reasons- very approachable during what I consider to be a really delicate event. After the procedure Dr. Haas explained the outcome and helped me understand what he discovered.
Was professional, efficient along with great bedside manner. The entire staff made the process very easy.
She was careful to provided need answers that I had about my current heath condition.
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