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

    • 05 JAN 15
    • 0

    Drug-induced liver injury: Are health supplements making you sick?

    “Lose Weight!” “Feel Great!” There are more than 50,000 vitamins, minerals and other dietary supplement products on the market, and many of them make some fairly bold promises about bolstering health and improving your life. Do they really perform as advertised, or do they fall short? Worse yet, could some of the supplements actually be

    • 12 DEC 14
    • 0

    Colonoscopies: Too much of a good thing?

    We know that colonoscopies save lives. As mentioned in an earlier blog post, a study by the Yale Cancer Center found that widespread screening has resulted in an estimated 550,000 fewer cases of colorectal cancer over the past three decades. Given the effectiveness of colonoscopies in saving lives, is it ever possible for patients to

    • 11 NOV 14
    • 0

    We’re losing the battle of the bulge

    There’s good news and bad news in America’s fight against obesity. The good news is over the past year obesity rates held steady in all but six states, while childhood obesity rates stabilized nationwide. The bad news is, the good news pretty much ends there. Even worse news for Tennessee, ours was one of the

    • 14 OCT 14
    • 0

    Prediabetes and type 2 diabetes create national health crisis

    Put down the greasy hamburger and put on your walking shoes. If I told you that losing weight by eating healthy and being more active could cut in half your risk of developing type 2 diabetes, would you listen? What if I told you that in America diabetes is the leading cause of kidney failure,

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