Patient Reviews

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.

5.0 Review from M.R. Source: Google Nov 25 2022

"Dr Brenner was very thorough, explain everything in detail. I was very pleased and happy with her. Glad to have her as my especialist."

5.0 Review from R.U. Source: Google Nov 25 2022

"Dr. Rufner was so friendly and easy to talk to. It was my first visit with him and he made me feel like I was a regular patient. He listened to all my concerns without judgment and I could tell he truly understood what I was saying! His medical assistant Cydney was also wonderful! I highly recommend Dr. Rufner!"

5.0 Review from T.D. Source: Google Jul 25 2022

"Friendly caring"

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

"Dr. Rufner surprised me with his attentiveness and listening skills. He took his time making me feel extremely comfortable and confident in my care plan. He told me his goal is to make me feel empowered."

5.0 Review from K... Source: Google May 25 2022

"The nurse was SO funny and friendly, all of the people working in the office were sweet and helpful, and the doctor was so informative. I felt listened to and felt like I really understood the full extent of the processes I was going to go through."

5.0 Review from K.W. Source: Google May 25 2021

"Dr Rufner was able to explain things in detail and without confusion."

5.0 Review from J.B. Source: Google May 25 2021

"Dr Sieja is caring, thorough, and professional. He listened carefully, asked questions, and clarified expectations about my care."

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

"Dr. Sieja was very detailed and thorough in discussing the issues that I had recently experienced. He was able to clearly articulate certain things that I needed to change that included both lifestyle and dietary changes. I would strongly recommend Dr. Sieja for anyone that needs to consult with a Gastroenterologist."

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

"It was nice to be taken seriously and have my experiences thoughtfully considered when Dr Brenner was making a plan for my gut health"

5.0 Review from H.C. Source: Google May 25 2021

"Dr Brenner has seen me since 2012. She diagnosed me and helped me through my ups and downs. She cares, she listens and always just wanted to make me feel better. She is knowledgeable and really explains things so you understand what is going on. I refer anyone that needs a GI doctor to go here. The staff went above and beyond to help me with an insurance issue as well..."