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We are currently unable to offer online appointment requests or communication with the practice through text message. We hope to have these features enabled again in the near future.

A Better Way

Our goal is to provide outstanding care in a timely, courteous, and professional manner. Our mission is to aid in improving your digestive health and also to be a resource to your primary care physician in caring for you. All of our physicians are committed to ongoing education and will make every effort to provide you with the most up to date and thorough care possible.
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To all my patients,

I'm retiring from clinical practice on September 1st, 2022. It has been my privilege to serve as your gastroenterologist for the past 26 years, and caring for you has been the most rewarding part of my career.

Looking forward, my staff will be available to assist you with your records and we have many talented physicians at Gateway. Please consider transitioning your care with Dr Jason Haas, Dr Rajeev Ramgopal or Dr Jonathan Seccombe.

I want you to know that your trust in me over these years has been greatly appreciated. Many of you have become not only my patients, but dear friends and I will miss seeing all of you.

Please accept my best wishes.

Sincerely,

Photograph of doctor Andrew Su
 
Andrew Y. Su, M.D.
COLON CANCER SCREENING

It Can Save Your Life
HEMORRHOIDS?

Don't Treat Them. Remove Them.
INFUSION SERVICES

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Awards & Affiliations


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Insurances

Gateway Gastroenterology is in-network with most insurance plans. However, you will want to confirm that we are in-network by calling your insurance company directly. If you have additional questions, please call the office.
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Locations

Gateway Gastroenterology


Main Office – Chesterfield:
121 Saint Luke’s Center Drive, Suite 406, Building A
Chesterfield, MO 63017
Phone: 314-529-4900 | Fax: 314-434-2679 | After-Hours Exchange: 855-224-7875

 
Gateway Endoscopy Center: 314-336-1130
St. Luke’s Hospital – GI Lab (East Medical Building): 314-542-4863
St. Louis Multispecialty Surgery Center: 636-779-0079