About Us

Western Colorado’s Leading Gastroenterology Group

Grand Junction Gastroenterology is the largest gastroenterology group serving western Colorado. Our staff currently includes six board certified Gastroenterologists, one Nurse Practitioner, one Physician Assistant and over 20 employees. Our goal is to provide our patients, referring physicians and the surrounding community with the best, most comprehensive, and highest quality of care possible.

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. The clinic procedure center are located within the same building. Our goal is to create a friendly, comfortable environment with health care providers specifically trained for your health care needs.

Our Physicians

Brent Prosser

Dr. Prosser originally hails from Cheyenne, Wyoming. After receiving his degree in biology from Creighton University in Omaha, NE, he

Eugene Crafton

Dr. Crafton has been helping patients with digestive and liver disease since 1997. After graduating from medical school at the

William Shields

DO, FACP, FACG

Dr Shields is a native of Colorado. He attended Western State Colorado University with a degree in biology followed by

George R. Winters III

MD, FACP, FACG

Dr. Winters graduated from Cornell University and the University of Vermont, College of Medicine. He completed his Internal Medicine residency

Philip Sarges

Dr. Sarges has a passion for caring for people with gastrointestinal system disorders. He’s experienced in capsule endoscopy, fecal transplant,

Our Advanced Practice Providers

Kirsten Boland

PA (ASCP), PA-C

Kirsten Boland, PA, joined the Grand Junction Gastroenterology team in the fall of 2019, specializing in liver disease diagnosis, care,

Patient 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.