MGA Gastrointestinal Diagnostic and Therapeutic Center Selected for Newsweek’s 2026 Best ASCs List
MGA Gastrointestinal Diagnostic and Therapeutic Center selected for Newsweek’s 2026 list of America’s Best Ambulatory Surgery Centers.
New Orleans’s Leading GI Specialists Dedicated to Patient Care
The gastroenterologists and staff at MGA Gastrointestinal Diagnostic and Therapeutic Center are dedicated to providing quality, affordable care to the greater New Orleans community in our quest to lower colon cancer rates and treat an array of digestive diseases, including Crohn’s Disease, irritable bowel syndrome (IBS) and gastroesophageal reflux disease (GERD).
MGA Gastrointestinal Diagnostic and Therapeutic Center is skilled in performing a myriad of digestive procedures, including colonoscopy, esophageal dilation, flexible sigmoidoscopy, upper endoscopy and small bowel enteroscopy.
For Your Visit
Our New Orleans gastroenterologists and staff at MGA Gastrointestinal Diagnostic and Therapeutic Center are committed to ensuring your experience with us is relaxed and worry-free, from your first office visit through your post-procedure follow-up. To assist us, we ask you read and comply with all guidelines.
We’re pleased to announce our partnership with StopColonCancerNow.com to help boost colon cancer screenings and prevention for residents in the Greater New Orleans area.
Patient Forms
At MGA Gastrointestinal Diagnostic and Therapeutic Center, your time is as valuable to us as it is to you. Upon scheduling your surgery, a member of our staff will provide you with the required forms to fill out.
Insurance and Billing
MGA Gastrointestinal Diagnostic and Therapeutic Center accepts most major insurance. As a courtesy to you, we will bill your insurance carrier; however, we cannot tell you what your policy will cover.
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Meet Our Physicians
View All Physicians
Richard Awtrey
M.D.
Howard I. Brenner
M.D.
Kirk Campbell
M.D.
Vernon J. Carriere Jr.
M.D.
George E. Catinis
M.D.
Julie C. Guider
M.D.
Brett Hymel
M.D.
Abdul M. Khan
M.D.
Rebekah (Becky) H. Lemann
M.D.
James D. Lilly
M.D.
Mark J. Marino
M.D.
Herbert K. Mayer
M.D.
Scott D. Pollack
M.D.
G. Richard Puente
M.D.
Sanjeeva T. Reddy
M.D.
Gary (Taavi) Reiss
M.D.
Charles G. Schibler, II
M.D.
David R. Silvers
M.D.
Mark J. Wegmann
M.D.
2,042 Reviews
Feb 20, 2026
Feb 20, 2026
I have my EGD done only one word to express my service outstanding from the whole staff at MGA
Feb 20, 2026
Dr. Brenner is such a caring Dr. with a great personality. He takes his time to hear your concerns and he gives feedback. His procedures are done with care and professionalism. His nurses does a good job with scheduling request, returning calls and with following up after procedures. Over all he’s a 5 out of 5.
Feb 18, 2026
Very helpful compared to other doctors!
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A very pleasant and efficient doctor's office for such possible life changing informational procedures!