About Us
Western Colorado’s Leading Gastroenterology Group

Because gastrointestinal diseases require continuity of care, we strive to align patients with a single gastroenterologist who communicates with you, your primary care clinician, and your other specialists.
A gastroenterologist on staff is always on call for established patients with urgent needs.
Referred patients are evaluated in the clinic in person or by confidential telehealth. Although some testing is done in the clinic, the sedated endoscopies are performed by our physicians at the adjacent endoscopy center, St. Mary’s Hospital, Community Hospital, and Colorado Canyonlands Hospital.
We look forward to helping you.
Physicians
- Brent Prosser, MD
-
William Shields, DO, FACP, FACG
George Winters, MD, FACP, FACG
- Philip Sarges, MD
- Ellen Dy, MD
Physician Assistants
- Hannah Pick, PA-C, MPAS
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Katie Rabbio, PA-C, MPAS
- Leah Barjenbruch, PA-C, MPAS
Our Office Policy
If you need to change or cancel your appointment, please contact us as soon as possible to reschedule. We request a minimum of 24-hour notice for a change concerning your appointment and reserve the right to charge a fee for missed appointments. Please note that appointments scheduled for Monday need to be cancelled by the previous Friday. Payment is due at the time of your appointment. If you have any questions regarding your insurance, please call your insurance company for the most accurate information. If you have any questions or concerns regarding financial arrangements, please call the billing number below.
Our Facility
Our facility is located at 1035 Wellington Avenue in Grand Junction, CO. and within the same building. Our goal is to create a friendly, comfortable environment with physicians specifically trained for your health care needs.
Our Physicians
Brent Prosser
MDWilliam Shields
DO, FACP, FACGGeorge R. Winters III
MD, FACP, FACGPhilip Sarges
MDEllen Dy
MDOur Advanced Practice Providers
Hannah Pick
PA-C, MPASKatie Rabbio
PA-C, MPASLeah Barjenbruch
PA-C, MPASPatient Testimonials
Dr. Winters does an excellent job. I have a rare intestinal disease, so I’ve seen several GIs before going to Dr. Winters. He’s par with only one other GI in his care for me and knowledge of my disease.
Tracy D
Just had a colonoscopy with Dr Crafton. Nobody I know relishes the idea of a colonoscopy but I can’t imagine a more pleasant experience than I just had. Dr Crafton was professional, personable and totally put me at ease. Chris was my CRNA and he was equally terrific. My nurses were wonderful and very caring. I would give my highest recommendation to the whole crew at Grand Junction Gastroenterology
Ken P
Best place the doctors and the nurses and everyone in there are so wonderful it's really nice of them to make you feel like family I would recommend this place to just anyone ever talked to thank you all so much.
Michael P
What Sets Us Apart

Team Of Board-Certified Specialists

Providing Personalized & Innovative Gastroenterological Care

Utilizing The Latest & Most Advanced Techniques

Offering Long-Term Patient Follow-Up & Direct Physician Access