Donald Denby, Jr., MD

DJ Denby, Jr, MD, received his medical degree from Texas Tech University, and went on to complete his residency and fellowship in gastroenterology at The University of Missouri. Dr. Denby is board certified in gastroenterology. 

Dr. Denby has been practicing gastroenterology since 2005, and has been with The Gastroenterology Center since 2010. He cares for a variety of patients with gastrointestinal disorders including, irritable bowel disorders, Hepatitis B and Hepatitis C, Celiac Sprue, Barrett’s Esophagus, and performs HALO ablation and colorectal cancer screenings. Dr. Denby also has a strong interest in continuing education and training in the latest technologies related to gastroenterology. 

Apart from being a gastroenterologist, Dr. Denby is also a novelist. He enjoys spending time with his family and attending church. 

Digestive Health Tips

Colonoscopy screening:  Better to look and find nothing, than not look and miss something.

Fiber:  Methylcellulose fiber supplementation is an excellent and less bloating option.

"I highly recommend methylcellulose fiber supplementation. This is an excellent choice and has less bloating symptoms.

Heartburn: If you are experiencing heartburn, “do not discount the need for an upper GI endoscopy to rule out abnormal pathology.”

Hepatitis C:  Now is the time to eradicate this chronic infection.

"If you are experiencing GI distress, give probiotics a try to see if these will help your symptoms.”

"Sleep apnea impacts the GI tract greatly. If you snore, consider talking to your physician about this."

Digestive Health Tips From Our Staff

Increasing your daily water intake is one of the easiest ways to improve your digestive health. Water helps dissolve substances in the GI tract to allow for a smoother passage.


Heartburn is a common affliction for many people, but if left untreated it can lead to complications such as Barrett’s Esophagus, which is a precursor to esophageal cancer.