Patient Reviews

Patient feedback

Throughout our years of service to the Denver, CO community, we've provided a wide array of GI services. The caring and compassionate environment that we've cultivated in our office is one of the many reasons why our patients have trust and confidence in the care we provide. To learn more about our quality of care, browse through our reviews below. You will see for yourself the care you can expect from our GI specialists at Colorado Gastroenterology.

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CG Denver - N Ogden St (5)

5.0 Review from L.B. Source: Google Nov 25 2022

"Dr. Sieja and his team are thorough and do a great job at explaining any diagnosis you may have. I felt confident being in his care and he has a great bedside manner."

5.0 Review from S.K. Source: Google Sep 25 2022

"I’ve been seeing Dr. Sieja for a decade now and he and his staff are always professional and attentive to my needs. I highly recommend him and Colorado GI!"

5.0 Review from G.H. Source: Google Sep 25 2022

"Very good bed side manner, activity listened to me and was engaged in the conversation. He was punctual and has a great personality"

5.0 Review from S.P. Source: Google May 25 2022

"Comprehensive, compassionate, educational with a solid plan of action put in place to address health issues. I highly recommend Dr. Kevin Rufner."

5.0 Review from M.G. Source: Google May 25 2021

"Great experience with dr rufner."

5.0 Review from B.P. Source: Google May 25 2020

"Everyone in the office was super friendly and professional."

5.0 Review from M.A. Source: Google May 25 2020

"Office is very efficient and Dr. Sieja really listens to what you have to say."

5.0 Review from J.F. Source: Google May 25 2019

"I went to see Dr. Rufner today, and the overall experience was fantastic. The receptionist was very courteous and friendly. I only waited a few minutes, and then was called into the medical exam room. When Dr. Rufner arrived, he took the time to listen, and then evaluate an appropriate course of action. He was extremely knowledgeable in his field, and at the same time he communicates in a manner where you can fully understand the theory behind his recommendations. Great doctor, and great human being."

5.0 Review from K. Source: Google May 25 2018

"I have spent plenty of time in doctor's offices and hospitals and unfortunately am only 30. I have genetics that make me very prone to colon cancer, so I met with Dr. Frank and had a colonoscopy done as a result. They found a polyp, removed it and I have a plan moving forward. Overall, with Dr. Frank and everyone in the office, they were extremely pleasant all the way over to the Denver Endoscopy Center. I have had terrible experiences and this was the complete opposite. I had also called another local gastro group and received a different experience. Regarding the poor review below about insurance and costs. I can't remember her name, but a representative of the office reached out to me about my insurance, clearly explained costs, potential for payment options, etc. Since I am young, my insurance didn't off the bat consider this preventative. I had genetic testing done and she was able to detail what I needed to do with the insurance company to get it to be preventative. She even allowed me to merge a call with her and my insurance provider. Couldn't have been happier. Thank you."

5.0 Review from D.Z. Source: Google May 25 2017

"Dr Brenner is the BEST--very well qualified as a gastroenterologist. Her bedside manner is so caring and an excellent listener who provides the best care possible--IBS seems to be the "in" disease and she is most sympathetic in handling issues surrounding IBS and providing answers and remedies ""