Patient Finds Answers Through Timely GI Evaluation at ASC
Discover how one patient found answers for chronic digestive issues at an ambulatory surgery center (ASC).
Why Choose Us?
Our gastroenterologists and staff at The Endoscopy Center are dedicated to providing quality, affordable care to the community in our quest to lower colon cancer rates and treat an array of digestive diseases, including Crohn’s Disease, irritable bowel syndrome (IBS) and gastroesophageal reflux disease (GERD).
Our board-certified GI doctors specialize in a myriad of GI procedures, including colonoscopy, flexible sigmoidoscopy and upper endoscopy.
Our patients value the compassionate care they receive from our GI doctors and say they are likely to recommend our center for GI procedures.
If you are due for a colonoscopy or in need of a GI procedure, don’t put it off any longer. Give us a call today!
For Your Visit
The Endoscopy Center is committed to ensuring that your experience with us is relaxed and worry-free, from consultation through recovery. To assist us, we ask that you read and comply with all guidelines.
We’re pleased to partner with StopColonCancerNow to help boost colon cancer screenings and prevention for residents in the Knoxville community.
Patient Forms
At The Endoscopy Center, your time is as valuable to us as it is to you. That’s why we provide online access to a variety of forms that patients may complete before their visit. The following documents will help us expedite the check-in process for your appointment. Please take a moment to download and print the appropriate form(s).
Insurance and Billing
The Endoscopy Center accepts most major insurance. As a courtesy to you, we will bill your insurance carrier for you; however, we cannot tell you what your policy will cover. Since your insurance policy and coverage are between you and your carrier, we urge you to contact them prior to your procedure. You will be responsible for any co-pays and deductibles. We accept cash, check or credit card.
Meet the Doctors
View All Doctors
Johnny Altawil
M.D.
Steven J. Bindrim
M.D.
Zachary Dickson
M.D.
William Ergen
M.D.
Jeffrey S. Gilbert
M.D.
John M. Haydek
M.D., A.G.A.F., F.A.C.G., F.A.C.P., F.A.S.G.E
Jason Huffman
M.D.
Hannah Jones
D.O.
Kevin Patrick Meyers
MD
Tejal Mistry
MD
Matthew Moore
M.D.
Raj I. Narayani
M.D., F.A.C.G., F.A.S.G.E
Maria B. Newman
M.D.
Ramanujan Samavedy
MD
2,300 Reviews
Feb 4, 2026
Feb 3, 2026
Dr Samavedy is a very good Dr. My stepdaughter has been seeing him for an esophagitis problem and her GI procedures for a couple of years. He is very thorough and answers our questions easily. My stepdaughter has special needs. Dr Samavedy is patient and kind with her which we appreciate very much. The staff was wonderful, caring and professional.
Feb 2, 2026
Dr. Altawil is the best; as is the staff @ Gastrointestinal Associates. I highly recommend Dr. Altawil.
Feb 2, 2026
Office ran things smoothly and procedure went exactly as they explained.
Jan 27, 2026
The entire staff is professional, warm, and helpful.
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My visit with Doctor Dickerson was excellent. Doctor Dickerson was very informative, answered all our questions and prepared me well for the procedure. Would highly recommend Doctor Dickerson if you have intestinal tract issues.