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Gastroenterologists in Knoxville, TN

75 listed in Knoxville, TN · Listings last verified October 2026 · How we vet listings

We list 75 gastroenterologists in the Knoxville area, most of them in Knoxville, Maryville and Oak Ridge. All are physicians (MD or DO), shown with the practice's phone number, address and Google rating where we could match one. 3 practices say they offer telehealth visits. Use the filters to narrow by city, telehealth, Medicare or Medicaid.

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Ahmad A. Abu-Heija, MD

Oak Ridge Gastroenterology Associates

Gastroenterology

Practice rating 3.3 (55 Google reviews)

Address
988 Oak Ridge Turnpike Suite 200, Oak Ridge 37830
Telehealth
Not listed
Medicare
Not listed
Medicaid
Not listed
Call (865) 483-4366 Website Directions

Last verified Oct 2026 Report a correction

Allison Locke, MD

Oak Ridge Gastroenterology Associates

Gastroenterology

Practice rating 3.3 (55 Google reviews)

Address
988 Oak Ridge Tpke Ste 200, Oak Ridge 37830
Telehealth
Not listed
Medicare
Not listed
Medicaid
Not listed
Call (865) 483-4366 Website Directions

Last verified Oct 2026 Report a correction

Arvinder Sachdev, MD

Gastroenterology

Address
1907 W Morris Blvd Ste G Healthstar Physicians, Morristown 37813
Telehealth
Not listed
Medicare
Not listed
Medicaid
Not listed
Call (423) 318-0014 Directions

Last verified Oct 2026 Report a correction

Barry V. Maves, MD

Gastrointestinal Associates

Gastroenterology

Practice rating 4.8 (2,165 Google reviews)

Address
1311 Dowell Springs Blvd Suite 300, Knoxville 37909
Telehealth
Not listed
Medicare
Not listed
Medicaid
Not listed
Call (865) 588-5121 Website Directions

Last verified Oct 2026 Report a correction

Bergein F. Overholt, MD

Gastrointestinal Associates

Gastroenterology

Practice rating 4.8 (2,165 Google reviews)

Address
1311 Dowell Springs Blvd Ste 300, Knoxville 37909
Telehealth
Not listed
Medicare
Not listed
Medicaid
Not listed
Call (865) 588-5121 Website Directions

Last verified Oct 2026 Report a correction

Charles B. Orton, MD

Oak Ridge Gastroenterology Associates

Gastroenterology

Practice rating 3.3 (55 Google reviews)

Address
988 Oak Ridge Tpke Ste 200, Oak Ridge 37830
Telehealth
Not listed
Medicare
Not listed
Medicaid
Not listed
Call (865) 483-4366 Website Directions

Last verified Oct 2026 Report a correction

Charles F. Gholson, MD

Oak Ridge Gastroenterology Associates

Gastroenterology

Practice rating 3.3 (55 Google reviews)

Address
988 Oak Ridge Tpke Suite 200, Physicians Plaza, Oak Ridge 37830
Telehealth
Not listed
Medicare
Not listed
Medicaid
Not listed
Call (865) 483-4366 Website Directions

Last verified Oct 2026 Report a correction

Charles O’Connor Jr., MD

Gastrointestinal Associates

Gastroenterology

Practice rating 4.8 (2,165 Google reviews)

Address
1311 Dowell Springs Blvd Suite 300, Knoxville 37909
Telehealth
Not listed
Medicare
Not listed
Medicaid
Not listed
Call (865) 588-5121 Website Directions

Last verified Oct 2026 Report a correction

Christopher M. Kulisek, MD

Westside Gastrointestinal Specialists- Lenoir City

Gastroenterology

Address
576 Fort Loudoun Medical Center Dr Ste 200, Lenoir City 37772
Telehealth
Not listed
Medicare
Not listed
Medicaid
Not listed
Call (865) 271-6180 Website Directions

Last verified Oct 2026 Report a correction

Clement H. Block Jr., MD

Oak Ridge Gastroenterology Associates

Gastroenterology

Practice rating 3.3 (55 Google reviews)

Address
988 Oak Ridge Turnpike, Oak Ridge 37830
Telehealth
Not listed
Medicare
Not listed
Medicaid
Not listed
Call (865) 483-4366 Website Directions

Last verified Oct 2026 Report a correction

Dushyant S. Dahiya, MD

Tennova Gastroenterology - Turkey Creek

Gastroenterology

Practice rating 2.1 (17 Google reviews)

Address
10800 Parkside Dr Ste 330, Knoxville 37934
Telehealth
Practice offers telehealth
Medicare
Practice accepts Medicare
Medicaid
Practice accepts Medicaid
Call (865) 531-4724 Website Directions

Last verified Oct 2026 Report a correction

In the Knoxville area

Our Knoxville listings cover East Tennessee around Knoxville: Knox County, Blount County, Anderson County, Loudon County, Hamblen County, Sevier County, Campbell County and Roane County. That reaches Morristown to the northeast and Sevierville toward the Smoky Mountains.

Specialist care here runs mainly through Covenant Health, the University of Tennessee Medical Center and Tennova. The McNabb Center is the region's large community mental health provider. Independent groups practice alongside them, such as Gastrointestinal Associates, Oak Ridge Gastroenterology Associates and StatCare for lung care.

Most listings are in Knoxville itself. Maryville and Alcoa in Blount County, Oak Ridge, Powell and Lenoir City have smaller groups. If you live farther out, check Morristown, Sevierville or La Follette before driving into the city. Many practices have more than one office, so ask about the location closest to you.

Gastroenterologists here include Gastrointestinal Associates, Oak Ridge Gastroenterology Associates, Knoxville Gastrointestinal Specialists and practices tied to Covenant Health and Tennova. Maryville and Oak Ridge have their own GI offices. Many groups run their own endoscopy centers, so ask where your colonoscopy would be done.

Nearby: Johnson City–Tri-Cities, TN · Chattanooga, TN · Nashville, TN

How to choose a gastroenterologist

A gastroenterologist, or GI doctor, diagnoses and treats problems of the digestive tract: the esophagus, stomach, intestines, colon, liver, pancreas and gallbladder. People see one for heartburn that won't go away, ongoing belly pain, diarrhea or constipation, bleeding, Crohn's disease or ulcerative colitis, and for colonoscopies.

Start with the kind of care you need. Many GI doctors handle a wide range of problems, but some focus on one area:

  • General gastroenterologists handle most needs: reflux, ulcers, irritable bowel syndrome, screening colonoscopies and follow-up on abnormal tests.
  • Inflammatory bowel disease (IBD) specialists manage Crohn's disease and ulcerative colitis over the long term.
  • Advanced endoscopists do complex scope procedures, such as removing large polyps or treating bile duct and pancreas problems.
  • Hepatologists focus on the liver. Many are gastroenterologists with extra liver training.

If you're not sure, a general gastroenterologist is the right first stop. They'll refer you on if you need a subspecialist.

Check credentials. Board certification in gastroenterology shows a doctor has finished specialty training and passed a certification exam. You can look up any doctor's certification for free on the American Board of Internal Medicine website [1]. Our listings show the credentials doctors report in the federal NPI registry, but we don't verify board certification.

Know if you're due for a colonoscopy. Experts recommend colorectal cancer screening for adults ages 45 to 75 [2]. A colonoscopy is one option. Some people can start with a stool test instead. Ask your primary care doctor which test fits you, and whether your family history means you should start earlier.

Confirm insurance before you book. Practices change the plans they accept, so call the office or check your insurer's directory. HMO plans usually need a referral first. Medicare Part B covers medically necessary specialist visits; you typically pay 20% of the Medicare-approved amount after your deductible [5].

Ask where procedures are done. Colonoscopies and other scopes happen in a hospital or a separate endoscopy center. The location can change what you pay, so ask before you schedule.

Know when not to wait. Vomiting blood or material that looks like coffee grounds, black or tar-like stool, or feeling faint, confused or cold and clammy with belly symptoms need emergency care, not an appointment [4]. Call 911.

Frequently asked questions

Do I need a referral to see a gastroenterologist?

It depends on your insurance. Most HMO plans require a referral from your primary care doctor before they'll cover a specialist visit. PPO plans and traditional Medicare usually don't. Some GI practices also want a referral or recent test results before they book you, especially for a procedure, so call ahead and ask what to bring.

At what age should I get a colonoscopy?

The U.S. Preventive Services Task Force recommends colorectal cancer screening for adults ages 45 to 75. A colonoscopy is one way to screen, and stool tests are another. People with a family history of colon cancer, certain polyps or inflammatory bowel disease may need to start earlier or screen more often. Ask your doctor what's right for you.

Does Medicare cover a screening colonoscopy?

Yes. Medicare Part B covers a screening colonoscopy once every 120 months for most people, or once every 24 months if you're at high risk. There's no minimum age. You pay nothing for the screening if your doctor accepts assignment. If a polyp is removed during the test, you may owe a share of the cost.

What happens at a first GI appointment?

Expect questions about your symptoms, diet, bowel habits, medications and family history, plus a physical exam. The doctor may order blood work, a stool test, imaging or a scope procedure such as an upper endoscopy or colonoscopy. Bring a list of your medications and any recent lab results, scans or procedure reports.

How do I know if a gastroenterologist is board certified?

Look the doctor up on the American Board of Internal Medicine's free "Verify a Physician" tool, which shows whether they're certified in gastroenterology. Our listings show the credentials doctors report to the NPI registry, but we don't verify certification ourselves.

Sources

  1. American Board of Internal Medicine — Verify a physician's certification
  2. U.S. Preventive Services Task Force — Colorectal cancer screening
  3. Medicare.gov — Colonoscopies (screening)
  4. NIDDK — Symptoms and causes of GI bleeding
  5. Medicare.gov — Doctor & other health care provider services (Part B)