398 gastroenterologists across Knox County. Browse by city or filter by insurance and telehealth.
The first visit includes a thorough review of your symptoms, diet, bowel habits, and medical history. The GI doctor may order blood work, stool tests, or imaging. If a colonoscopy or endoscopy is needed, they will schedule it separately and explain the preparation. Procedures are done under sedation and typically take 20 to 45 minutes. You will need someone to drive you home afterward.
See a gastroenterologist for persistent heartburn or acid reflux, difficulty swallowing, chronic abdominal pain, unexplained weight loss, blood in your stool, chronic diarrhea or constipation, inflammatory bowel disease (Crohn's, ulcerative colitis), abnormal liver tests, hepatitis, celiac disease, or when it is time for a screening colonoscopy. Your PCP may refer you after initial evaluation.
Office visit copay: $30-75 · Screening colonoscopy: $0 (preventive) · Diagnostic colonoscopy: $1,500-4,000 · Upper endoscopy: $1,000-3,000
Frequent heartburn that does not respond to over-the-counter antacids may be gastroesophageal reflux disease. A gastroenterologist evaluates the severity and recommends treatment to prevent long-term esophageal damage.
Crohn disease and ulcerative colitis require ongoing management by a gastroenterologist who monitors disease activity, adjusts medications, and performs colonoscopies to assess the health of your intestinal lining.
IBS causes bloating, cramping, and unpredictable bowel habits that interfere with daily life. A gastroenterologist confirms the diagnosis and helps you find dietary and medical strategies that bring relief.
Colonoscopy is the gold standard for colorectal cancer screening, now recommended starting at age 45. A gastroenterologist performs the procedure and removes precancerous polyps before they become dangerous.
Elevated liver enzymes, fatty liver, hepatitis, and cirrhosis all fall within a gastroenterologist scope. Early detection and management prevent progression to liver failure.
Screening colonoscopies are covered at 100% as preventive care under the ACA with no copay (for average-risk patients starting at age 45). If polyps are found and removed during a screening, the procedure should still be billed as preventive. Diagnostic colonoscopies (ordered for symptoms) are subject to your deductible and copay. Verify the endoscopy center is in-network separately from the doctor.