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Monday 9am - 5pm Tuesday 9am - 5pm Wednesday 9am - 5pm Thursday 9am - 5pm Friday 9am - 5pm

Advanced Gastroenterology - Jeffrey Wallis, MD, PA

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Crystal River, FL
Advanced Gastroenterology - Jeffrey Wallis, MD, PA

Dr. Jeffrey Wallis and his staff are pleased to have this opportunity to provide you with the best p

08/23/2025

"Thank you for your patience and for explaining everything so clearly too the girl with the black hair in the front..Josh W the pa is very friendly and knowledgeable." says Kash on Google

★★★★★ Thank you for your patience and for explaining everything so clearly too the girl with the black hair in the front..Josh W the pa is very friendly and knowledgeable.

03/22/2025

"Have only positive feedbacks. Sometimes longer waiting time…but that’s not abnormal.
Great doctors, all our question were answered." says Kate on Google

★★★★★ Have only positive feedbacks. Sometimes longer waiting time…but that’s not abnormal. Great doctors, all our question were answered.

08/26/2024

"Great people, Dr Wallis, Josh the P.A., Jennifer, Susan and whole staff, are so compassionate, so thorough. Thanks to them!" says Louise on Google

★★★★★ Great people, Dr Wallis, Josh the P.A., Jennifer, Susan and whole staff, are so compassionate, so thorough. Thanks to them!

08/24/2024

"They are very professional and respectful" says Jerry on Google

★★★★★ They are very professional and respectful

08/19/2024

"Wallace and Josh are great doctors" says Tina on Google

★★★★★ Wallace and Josh are great doctors

08/18/2024

"A 5 star provider caring staff !!" says Steve on Google

★★★★★ A 5 star provider caring staff !!

08/08/2024

"It was nice haveing a dr listen to me and take the time at my appointment I met both dr and was very comfortable with them both and the staff was very welcoming best decision I made in doctors" says Cindy on Google

★★★★★ It was nice haveing a dr listen to me and take the time at my appointment I met both dr and was very comfortable with them both and the staff was very welcoming best decision I made in doctors

07/25/2024

"I’m so glad to have been linked up with this Doctors Office. Staff is amazing and the Doctors, well they Care! And explain things so one can understand." says Tine on Google

★★★★★ I’m so glad to have been linked up with this Doctors Office. Staff is amazing and the Doctors, well they Care! And explain things so one can understand.

07/18/2024

"real good" says larry on Google

★★★★★ real good

07/03/2024

"Dr Wallace and Dr Williams are very kind and thorough. I finally feel like I am being heard and they are doing everything to help me. I appreciate them both so much. I highly recommend them! Thank you for helping me!" says Joanne on Google

★★★★★ Dr Wallace and Dr Williams are very kind and thorough. I finally feel like I am being heard and they are doing everything to help me. I appreciate them both so much. I highly recommend them! Thank you for helping me!

07/02/2024

"Great front office personnel! The nurse was was especially kind. The doctor was thorough and explained in a way I understood." says Cathy on Google

★★★★★ Great front office personnel! The nurse was was especially kind. The doctor was thorough and explained in a way I understood.

07/01/2024

"Dr Wallis is amazing. I haven't had that thorough an exam on at least 20 years. Other than having to wait for a while, which I think front desk should be more forthcoming on current time to be seen when in office. I am amazed by his fact finding ability, memory and sense of humor. I have scheduled my colonoscopy and was given complete instructions and dates leading up procedure and followup. I would highly recommend De.." says Clancy on Google

★★★★★ Dr Wallis is amazing. I haven't had that thorough an exam on at least 20 years. Other than having to wait for a while, which I think front desk should be more forthcoming on current time to be seen when in office. I am amazed by his fact finding ability, memory and sense of humor. I ...

Address

6152 W. Corporate Oaks Drive
Crystal River, FL
34429

Opening Hours

Monday	9am - 5pm
Tuesday	9am - 5pm
Wednesday	9am - 5pm
Thursday	9am - 5pm
Friday	9am - 5pm

Telephone

+13525643900

Website

http://advancedgiassociates.com/

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About Dr. Wallis

Dr. Wallis attended college at Harvard University where he graduated magna cm laude with a BA in Biology. He completed medical school at Cornell University Medical College at New York Hospital. He continued his postgraduate training in internal medicine at the University of Michigan in Ann Arbor, as well as at Rutgers University Medical School in New Jersey. Dr. Wallis then completed a Gastroenterology/Hepatology fellowship at the State University of New York at Stony Brook.

Professional Medical Societies: - Dr. Wallis is a Member of the American Society for Gastrointestinal Endoscopy, Florida Medical Association, Elected President - Citrus County Medical Society, American Medical Association and American Gastroenterological Association.

Dr. Wallis is very happy to call Citrus County home.