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Gastroenterologist
121 Saint Luke's Center Drive
Suite 406, Building A
Chesterfield, MO
63017
Top reviews
No one I know is skipping in to any gastrointestinal exam like it’s the most thrilling day of their life. But, at a certain age, it’s an important thing to check off your to do list. Dr Haas and his team at Gateway made my colonosShow morecopy appointment so much more comfortable. The facility is so nice and so clean and every staff member I encountered from phone calls prior through the entire check in process and then waking up post procedure was so professional and so calm and reassuring. The whole experience was very fast and easy. I’m glad I made the choice to go to Dr Haas at Gateway and I’m happy to have the peace of mind that comes with a thorough check up by a top notch physician. I would highly recommend Dr Haas and Gateway Gastroenterology to anyone who needs to have a colonoscopy.
I had a great experience with Dr. Haas and the entire staff. Everyone was welcoming, and made me feel completely at ease. It is clear that patient comfort and care are a priority.
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 (3)
Gateway Gastroenterology
121 Saint Luke's Center Drive
Suite 406, Building A
Chesterfield, MO, 63017
Gateway Gastroenterology
1040 Old Des Peres Rd
Des Peres, MO, 63131
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
No one I know is skipping in to any gastrointestinal exam like it’s the most thrilling day of their life. But, at a certain age, it’s an important thing to check off your to do list. Dr Haas and his team at Gateway made my colonoscopy appointment so much more comfortable. The facility is so nice and so clean and every staff member I encountered from phone calls prior through the entire check in process and then waking up post procedure was so professional and so calm and reassuring. The whole experience was very fast and easy. I’m glad I made the choice to go to Dr Haas at Gateway and I’m happy to have the peace of mind that comes with a thorough check up by a top notch physician. I would highly recommend Dr Haas and Gateway Gastroenterology to anyone who needs to have a colonoscopy.
I had a great experience with Dr. Haas and the entire staff. Everyone was welcoming, and made me feel completely at ease. It is clear that patient comfort and care are a priority.
Great doctor. Really gets to know what is going on and wants his patients to feel better. Very informative doctor. Would recommend to anyone.
Very good experience with Gateway Gastroenterology & Dr. Jason Haas. Excellent, efficient staff ... highly recommend!
Quick and easy procedure! It only took about an hour start to finish.
Positive experience. Everyone was professional and on time.
Everyone is professional and personable. Doctor Haas didn’t rush his explanation and took time with me.
Everything went very smoothly
Everyone there was the greatest
Five stars. Dr. Hass,DO. He is very thorough and kind. Makes the patient feel calm and relaxed.
The entire Staff was welcoming and very caring! I wouldn't go anywhere else for my colonoscopy.
Dr. Haas has treated me with patience and empathy. He takes time to explain everything I have questions about, never in a hurry to end the consult. Meticulous in every aspect of my care he listens carefully to every concern I have. I am completely comfortable and satisfied with the level of medical care I receive in Dr Haas's office.
Very informative and friendly!
Professional, caring, informative
I was kept informed throughout the process, and kept comfortable,
The nurses were so kind and caring, very short wait time. Dr. Haas was very professional and thorough. Made an unpleasant procedure very pleasant.
Doctor Haas is very nice and friendly listens to what you have to say. And all the staff were very nice. Also thank you
Dr. Haas took the time to listen to me and try to make sure I am doing what is best for my health.
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.
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