A New Approach
to Weight Loss

Learn more about GIA's comprehensive program
and the nonsurgical ORBERA™ gastric balloon.
Click Here

GIA, the go-to group
for top value and

Your health is our practice


Our patients give GIA's care and
service the highest ratings.


GIA's physicians consistently surpass
national quality benchmarks.

Gastrointestinal Associates is leading the way in gastroenterology care in the greater Knoxville area. Founded in 1971, we now offer three accredited ambulatory surgery centers featuring modern equipment, highly trained staff, lower costs and greater convenience. All of our physicians are board certified, highly experienced and have specialized training in the diagnosis and treatment of diseases of the digestive system: esophagus, stomach, small and large intestine or colon, liver, pancreas and gallbladder.

GIA physicians perform approximately 15,000 colonoscopies each year – more than any other GI practice in the region – and our team has performed more than 250,000 procedures, including 200,000 colonoscopies over the past 15 years. That extensive experience benefits our patients. GIA considerably exceeds national benchmarks for finding and removing precancerous polyps, which means our patients are less likely to develop colorectal cancer.

Under the leadership of GIA co-founder Dr. Bergein “Gene” Overholt, who designed the flexible fiberoptic sigmoidoscope and colonoscope that led to the use of the lifesaving screening colonoscopy, GIA continues to pioneer gastrointestinal health care. In 1986, GIA opened the country’s first licensed and Medicare-certified endoscopic ambulatory surgery center, reducing patient cost and need for a hospital stay.

We continually strive to achieve the best possible outcomes for our patients, and we are honored that our efforts were recognized by the American College of Gastroenterology, which is rare for a private practice.

To learn more about our practice, visit the About Us section of this website.

Latest News

    • 06 NOV 15
    • 0

    Gastrointestinal Associates launches GIA 180, a new weight loss program

    Gastrointestinal Associates (GIA), one of the Southeast’s leading GI practices, has launched GIA 180, a program that uses a balanced, multifaceted and surgery-free approach to weight loss featuring ORBERA, the global market leader for intragastric balloons. Used in more than 220,000 people in over 80 countries, the ORBERA balloon is placed endoscopically and fills space

    • 25 AUG 15
    • 0

    Gastrointestinal Associates welcomes Dr. Jeff Gilbert

    Dr. Jeffrey “Jeff” Gilbert has joined Gastrointestinal Associates (GIA), one of the Southeast’s leading GI practices. Gilbert serves as a member of the American College of Gastroenterology, American Society for Gastrointestinal Endoscopy and American Gastroenterological Association. He is board certified by the American Board of Internal Medicine in both internal medicine and his primary specialty,

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