The Golden Triangle’s Leading Digestive CARE Experts

Quality, compassionate care for your gastroenterology and digestive care.

Columbus Mississippi’s Only Board-Certified Gastroenterologists


Experienced Team of Doctors & Nurses

AAAHC Accredited Ambulatory Surgery Center

Locations in Columbus MS & Starkville MS

Shorter Wait Times

Efficient, Intimate Care

Let Us Care For You

Comprehensive Digestive Services

From diverticulitis to the most severe GI disorders, our board certified gastroenterologists are ready to help.


State-of-the-art diagnostic devices.

Digestive Cancer Screening

Early diagnosis is the key to effective treatment and management.


Over 50? You should have already started colon cancer screening.


Digestive Care Specialists in Lowndes & Oktibbeha Counties

Gastroenterology Associates is dedicated to keeping our community healthy through integrated care for the diagnosis and treatment of gastrointestinal disorders. We specialize in the prevention and early diagnosis of digestive cancer through education and screening tests. Committed to high-quality care, we want all our patients to be informed decision makers and fully understand any health issues they face. When you work with our expert team, you’ll have a true partner in your digestive health.

Colon Cancer is Preventable, Treatable & Can Be Beaten!

Starkville native, Dak Prescott is passionate about colon cancer awareness and prevention. For him, it's a topic that hits close to home. That's why he partnered with Gastroenterology Associates to produce this important community message.


Gastroenterology Associates of Columbus present

this special 30 minute show on the importance of colon health and colon cancer screenings.


On The Beat Interview Segments


“The staff and physicians took a dreaded situation and made it as comfortable as possible.”

Verified Reviewer

“From making the appointment, the initial information gathering appointment, to the procedure everyone was helpful, courteous and professional. I was informed of every step and felt well cared for. They made an awkward procedure not so bad!”

Verified Reviewer

“Gastroenterology Associates of Columbus made everything so smooth and comfortable during my visit.”

Delois B.

“Everyone was very professional and attentive. My experience was wonderful.”

Susan T.

“Dr. Johnston is always very professional and I trust him with my GI healthcare. The staff was very professional and friendly including the nurse anesthetist. They were concerned about making sure that I was comfortable.”

Verified Reviewer

“Gastroenterology Associates of Columbus treated me with the upmost respect. Doctor Johnston and his staff were very professional and kind. I have recommended to family and friends to schedule their colonoscopy with Gastroenterology Associates of Columbus.”

Beverly S.

“The level of professionalism and care provided by Dr. Heard and his staff at Gastroenterology Associates of Columbus is outstanding. They were warm and welcoming, frequently checking to make sure I was comfortable and had no questions or concerns before and after my procedure. The next day they followed up to ensure that I had experienced no issues.”

Verified Reviewer

“The entire experience including the doctor office visit was awesome. Thank you for the great work you all do. Will be back. I have 4 other family members seeing Dr. Alan Williams for their colon test. Very pleased with the service.”

Bernice W.

“The staff was so awesome the doctor was wonderful my overall experience was wonderful thanks everyone”

Cynthia B.

“I have used Gastroenterology Associates of Columbus twice for both upper and lower scopes. The staff and it's doctors were always knowledgeable, and courteous towards all of their patients. I would highly recommend them to anyone seeking this type of care.”

Stephen B.