Mark Douglas Porta Jr., M.D.



9103 Jefferson Hwy

Baton Rouge, LA 70809

Closed. Opens Mon at 8 AM

Quick Facts

  • Board Certified Gastroenterologist
  • Currently Accepting New Patients
  • Most Insurance Plans Accepted
  • Performs Colonoscopies

GA, LLC - Baton Rouge, LA - Jefferson Hwy

Gastroenterology in Baton Rouge, LA

GA, LLC - Baton Rouge, LA - Jefferson Hwy

9103 Jefferson Hwy

Baton Rouge, LA 70809

Closed. Opens Mon at 8 AM

Request an Appointment

If you are experiencing a medical emergency, please call 9-1-1. This form is intended for non-urgent appointment requests only. Non-emergency requests will be responded to within 24-48 hours.

About Mark Douglas Porta Jr., M.D.

Why did you choose to specialize in Gastroenterology?

I chose Gastroenterology because I enjoy the opportunity to interact and speak with patients on a daily basis. I believe this subspecialty provides both a medical and surgical approach to treatments. The procedural modalities available allow for both treatment and preventative therapies as well. I enjoy taking part in the evolution within the field of gastroenterology and look forward to seeing what the future holds.

Do you have a specialty of interest within GI?

No specific interest within GI at present.

Where did you study?

I went to Louisiana State University and graduated with a bachelors in basic science. I attended medical school at Louisiana State University in New Orleans from 2008-2012. I received my Internal Medicine training at Louisiana State University in Baton Rouge from 2012-2015. I completed subspecialty training in Gastroenterology and Hepatology at Louisiana State University in Shreveport from 2015-2018.

What certifications do you hold?

Board Certified in Internal Medicine, Board Eligible in Gastroenterology

What do you and your family enjoy doing in your spare time?

On my days off, I enjoy spending time with my wife, family, and friends. My passion outside the field of medicine is music. I have played electric and acoustic guitar for over 20 years and counting. I also enjoy playing golf and tennis.

Please list your professional affiliations.

American College of Gastroenterology
American Gastroenterology Association
American Society for Gastrointestinal Endoscopy


My visit with Dr. Porter was very professional and Informative. He explained my condition throughly and provided me with recommendations.

D.B. Google

I feel so blessed to be a patient of Dr. Porta! He is extremely easy to talk to about anything, and is extremely knowledgeable about anything I have questions about! Dr. porta also has an amazing bedside manner. His nurses, and staff are all very friendly and caring ! I’m so happy to be a part of their group, and I highly recommend Dr. Porta to anyone needing an amazing gastroenterologist!!!

F.V. Google

Quick and prompt service at this clinic. Dr Porta is the greatest at making one feel appropriately looked after and answers all questions with an appropriate answers and explanations to a patient’s questions and concerns. Glad I found GI Associates

L.C. Google

Very informative visit

B.P. Google

The Best. My hubby is a Veteran had stomach issues for a while Dr.Porta pinned point the problem..finally got the relief. His staff are the best as well..I would recommend him to family and friends.. keep up the great work Dr.Porta....

B.M. Google


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