A New Approach
to Weight Loss

Learn more about losing weight –
and keeping it off – with GIA 180.
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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

    • 17 SEP 16
    • 0

    GIA 180 leads the way in bariatric endoscopy

    As I shared at the 2016 GI Roundtable, I believe that helping patients lose weight and maintain weight loss is one of the single most effective treatments physicians can offer their patients to help them with long-term health. With endoscopic approaches for weight loss gaining traction, I see a real opportunity for weight management in

    • 08 SEP 16
    • 0

    GIA Welcomes Dr. Jason Huffman

    Dr. Jason L. Huffman has joined Gastrointestinal Associates (GIA), one of the Southeast’s leading GI practices. “Dr. Huffman comes to us with a solid background in gastroenterology and a clinical focus on endoscopy, making him an excellent fit with our physicians,” Gastrointestinal Associates CEO Jeff Dew said. “He shares our team’s commitment to the highest

    • 31 MAY 16
    • 0

    How ‘bulky’ is your fiber knowledge?

    Are you trying to follow a healthier lifestyle? If you’re looking for ways to boost your efforts, fiber can play an important role in helping you achieve that goal. Chances are you’ve heard before that consuming the recommended amount of dietary fiber is important for good health. Understanding the “why” behind that advice may strengthen

    • 26 FEB 16
    • 0

    Studies linking PPIs to dementia are no need for panic

    Proton pump inhibitors (PPIs) were first approved for use in the 1980s. They are sold by prescription and over-the-counter under a variety of brand names, including Nexium, Prilosec and Prevacid. By lowering the amount of acid produced in the stomach, these medications are very effective at treating heartburn and indigestion, along with additional diseases such

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