Gastroenterology
HRRMC employs four board-certified surgeons and contracts with additional board-certified, fellowship-trained gastroenterologists that all provide gastrointestinal endoscopy procedures.

Our team of general surgeons - Jeremy Hedges, M.D., Zachary Green, M.D. and Stefan Iverson, D.O. - have offices at the hospital's main campus in Salida, performing many types of gastroenterology and surgical procedures at HRRMC.
HRRMC's gastroenterology nurse practitioner Marion Toll, NP-C sees patients in our clinic.
Other procedural services are supported by Associates in Gastroenterology (AG) of Colorado Springs. AG's fellowship-trained gastroenterologists perform procedures at the hospital, but do not see patients in clinic. A referral is required through HRRMC's surgeons or HRRMC's gastroenterology nurse practitioner for these procedures.
What exactly does a GI doctor do?
Here is a brief list of conditions you may be treated for and procedures your physician may suggest.
- Upper Endoscopy/EGD - This is a scope of the upper gastrointestinal tract (i.e. esophagus, stomach and duodenum) to determine the existence of ulcers and other problems.
- Lower Endoscopy/Colonoscopy - This is a scope of the lower gastrointestinal tract (i.e. colon and rectum) to determine if there are precancerous polyps, cancer or inflammatory bowel disease.
- Flexible Sigmoidoscopy - This scope looks at the lower colon and rectum for precancerous polyps and cancer.
Our Gastroenterology Providers
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Jeremy Hedges MD,MPHSpecialties- General Surgery,
- Trauma Surgery
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Teresa Yanchak MDSpecialties- Gastroenterology
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Austin E Garza MDSpecialties- Gastroenterology
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Stefan S Iverson DOSpecialties- General Surgery,
- Trauma Surgery
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Bryan C Kavanaugh MDSpecialties- Gastroenterology
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Zachary Green MDSpecialties- General Surgery,
- Trauma Surgery
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Stacy Abbott FNP-CView Profile -
Marion Toll NP-CSpecialties- Gastroenterology
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Matthew Drew MDSpecialties- Gastroenterology
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Where We Provide Gastroenterology Services