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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- Acid Reflux (10)
- Colon Cancer (9)
- Colorectal Polyps (10)
- Crohn's Disease (9)
- Fatty Liver Disease (9)
- Helicobacter Pylori (10)
- Hemorrhoids (8)
- Hepatitis (10)
- Inflammatory Bowel Disease (9)
- Irritable Bowel Syndrome (9)
- Non-alcoholic Steatohepatitis (9)
- Pancreatitis (9)
- Ulcerative Colitis (9)
- GERD (9)
- Biliary Obstruction (9)
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- Esophageal Stricture (9)
- Esophagus Problems (10)
- Gallstones (9)
- Pancreatic Cancer (10)
- Liver Masses or Cysts (9)
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- Anemia/Iron Deficiency (9)
- Barrett's Esophagus (10)
- C. Difficile Colitis (10)
- Celiac Disease (9)
- Cyclic Vomiting Syndrome (CVS) (9)
- Diverticulitis (10)
- Diverticulosis (10)
- Fistula (8)
- Food Intolerance (9)
- Gallbladder Disease (9)
- Gastritis (10)
- Hiatal Hernia (10)
- Ileitis (9)
- Impacted Bowel (10)
- Jaundice (10)
- Esophagitis (10)
- Eosinophilic Esophagitis (10)
- Esophageal Motility Disorder (10)
- Lactose Intolerance (10)
- Liver Cirrhosis (9)
- Primary Biliary Cholangitis (10)
- Primary Sclerosing Cholangitis (8)
- Colitis (9)
- Abdominal Pain (7)
- Anal/Rectal Bleeding (10)
- Bloating (9)
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- Constipation (10)
- Diarrhea (10)
- Difficulty Swallowing (10)
- Unexplained Weight Gain/Loss (9)
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Reviews for CG Denver - N Ogden St
"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."
"Amazing Group and Dr. Brenner!"
"Very pleasant visit. The steps to diagnose my condition were explained to me and I felt quite comfortable with this doctor."
"Very knowledgeable doctor. He also took his time listening to my concerns and was patience. I'm very satisfied with my visit. Thank you"
"Very thorough and informative. Helps me understand and teaches me why something is happening in my body."
"I've seen Dr. Kevin Rufner for a few visits over the last year while we get my treatment plan changed up, and I'm extremely satisfied with his care. I've had IBD for 40 years, and lived in different places, so I've seen many GI Docs over that time. You won't go wrong with him as your GI Doc."
"This is the best doctor experience I have ever had. Dr. Rufner is so kind and takes the time to explain everything so well. The office staff were incredible- kind and helpful!"
"Dr. Sieja listened to what was ailing me during my visit and straightforward on what needed to be done next. I was happy with my visit."
"Everyone was professional and very nice."
"Comprehensive, compassionate, educational with a solid plan of action put in place to address health issues. I highly recommend Dr. Kevin Rufner."
"Dr Rufner did a great job and has my GI symptoms under good control"
"I have been a patient of Dr. Kevin Rufner with Colorado Gastroenterology for many years, and it has always been a positive experience. Dr. Rufner is a kind and caring human being who really listens to his patients. He never makes me feel rushed or hurried, gives me up-to-date information about my health complaints, and always comes up with a complete plan of care for every issue. Additionally, his staff are friendly and supportive. I cannot recommend Dr. Rufner enough. He is an excellent doctor with an excellent staff."
"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."
"EVERYTHING WAS GREAT!"
"Dr Rufner is a caring physician and listens intently to concerns."
"Everyone in the office was super friendly, efficient, and professional. As good of a doctor’s office visit as I have ever experienced."
"I like her writing down directions because I usually can't write fast enough to get them down myself. She quickly gets to the point, and we are done with a hopeful direction to go next."
"Dr. Sieja listed to what I had to say. Scheduled appointments for me the very next day, in order to get to the root of my problem. I am thankful for having him as my doctor."
"Excellent and informative tele-health appointment on July 15 with Dr. Rufner, who is always personable and who gets to the nub of the matter and explains clearly whatever action is next required. Inspires confidence. A+"
"Dr. Sieja is extremely knowledgeable, professional and friendly. I know I am in good hands and getting great advice. Thank you!!!"
"He was very professional and helpful"
"Video telemedicine is quick, easy, efficient platform for medical needs planning that works well for me."
"I have been a patient of Dr. Sieja for many years. He has helped me through a lot in the past few years. He is caring and very easy to talk to. HE LISTENS!!!"
"My son is a new patient of Dr. Rufner. Thus far I can say he’s pretty awesome. He created a plan for my son, and is honest and gentle."
"I really felt heard. Dr Rufner was truly interested in my situation. I felt like I could trust him. I’ve not had great experiences with gastroenterologists and my expectations were low, dr Rufner completely blew my expectations through the roof. What an amazingly smart man with terrific bedside manner. I’m super happy to have him in my life."
"I saw Dr Brenner years ago and decided to do a follow up. She was as wonderful as I remember 9 years ago. Getting an appointment scheduled was not an issue, and I was happy to do a an appointment over the phone as well. Great experience."
"He is so knowledgable and likes to talk over all your options not just take this and call me in a few days"
"Had a very nice Consultation with Dr. Sieja, looking forward to my endoscopy to get some solid answers."
"Dr. Brenner was professional and kind. She took plenty of time to talk through my symptoms and took the situation very seriously. I really appreciate her ability to think beyond just GI possibilities, and her commitment to figuring out what's wrong with me. I am so appreciative!"
"Dr Rufner listened carefully to my medical issue, asked me relevant questions and provided me clear explanations of my likely condition. Dr Rufner provided his plan to help me. I left his office with confidence that I am in very good hands with a knowledgeable and caring doctor."
"I have been to other Gastro office and this one by far has been 100 better than I could have ever expected! Dr. Brenner is amazing and seems to truly care about her patients! I would whole heartily recommend this practice!"
"Dr. Brenner is a beautiful person,understanding and compassion she will take care of you and she always be concerned if you are following you treatments and helping you to get better and healthy to have a better life..she will listen to you concerns and you problems and she will focus to get you healthier. I love Dr. Brenner 💜"
"My interactions with Dr. Rufner and the staff of Colorado Gastroenterology have been professional, friendly, and reassuring."
"I felt that Dr. Rufner was very engaged and interested in helping me get closer to resolving my gastro issues. The initial consultation went well and I think that Dr. Rufner and his team will provide me the best possible care with any future issues I may encounter."
"Dr. Brenner is always nice, thorough, knowledgeable. She has helped me a lot for over a decade. I highly recommend her!"
"Dr Ruffner is a very informed and progressive physician who relies on his education, experience and collaboration with others to be effective for his patients. He has been the only physician who didn’t quickly dismiss my digestive issues as IBS and truly explored deeper which paid off. He listens and takes his time to respond and explain. You will never feel rushed. In the past I’ve had issues with inept administrative and assistant staff but so glad to have NeeNee as the face of this practice. She’s personable and pleasant to work with."
"It was nice to be taken seriously and have my experiences thoughtfully considered when Dr Brenner was making a plan for my gut health"
"Appreciate, very best customer service and professional work. Thank you"
"I have consulted with Dr Rufner several times now and each time he is kind, thorough, and empathetic. I enjoy talking to him and would highly recommend him."
"He was Proffesional, thorough, efficient."
"He is the best."
"The staff and Dr. were very pleasant and professional."
"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."
"I've been seeing gastroenterologists in various cities for the past 20 years. Dr Kevin Rufner is BY FAR the most informative, patient, kind, and knowledgable doctor I have worked with. He is a member of various advisory boards and study groups around the state and country and so is informed about the latest clinical studies, and he is always willing to take as much time as I need to explain my current health status, his recommendations and reasoning behind them, and address any concerns or questions I have. I have never felt rushed or confused, and even when the news isn't great I leave his office feeling empowered about next steps. I cannot stress enough how much I have preferred working with him over any other GI I've seen. I used to leave my doc's office in tears so frequently because of feeling confused and scared about what I was going through, that I started taking a full day off work whenever I had an appointment, regardless of appointment time. This pattern ended when I started seeing Dr Rufner. I have also never posted a review for a doctor before because I've never had an experience worth sharing until now. I've recommended Dr Rufner to a number of friends and colleagues. I'd also like to point out that every staff member I've encountered at the Colorado GI Ogden Street location has been patient, friendly, helpful, and easy to work with. They've also contributed to my general feelings of ease whenever I need to visit the office."
"Dr Sieja is caring, thorough, and professional. He listened carefully, asked questions, and clarified expectations about my care."
"Dr. Rufner was very knowledgeable and answered all my questions I had before I could even ask them. The prompt response and fast scheduling from them made my experience here way better than the last Gastroenterologist I was at."
"My experience with Dr. Rufner was incredible. He listened to my concerns and was very informative and polite. Will definitely be back here if I have any additional gastro issues!"
"This is under Susie Arnold. Dr. Rufner is Amazing. He never makes you feel rushed. he explains everything, answers all your questions, draws pictures and always remembers who i am even when it has been 2 years since i have been there. The staff is always friendly and helpful. Because of Covid they have been short staffed."
"Dr. Ruffner is the very best! He has His patients best interest at heart and is very much in tune with the needs of those that are lucky enough to have found their way to be in His s care!"
"Dr Brenner is always warm and accommodating. She is very accepting of my input and makes me feel like a part of the treatment process!"
"Dr. Rufner really listens to what I have to say and can always make me understand what's going on and make suggestions to help me. I would highly recommend him. He is a great doctor!"
"Dr. Rufner thoroughly explained what he performed in a very understandable way. All the results were, also, communicated very well. He provided some suggestions on how to supplement my diet going forward. I would highly recommend Dr. Rufner"
"I had to wait for a while due to Covid and also a downed room computer, but I was kept informed and even Dr. Brenner came to the waiting room to let me know. I appreciated this. Another enjoyable follow up visit with Dr. Brenner and I left with the feeling that I was cared for and my concerns were addressed. Thank you."
"The staff is friendly and prompt. I like working with Dr. Seija. He listens, encourages me to ask questions, empathizes and explains my health needs in a very understandable way. I'm grateful to have found him."
"I had a colonoscopy with Dr Brenner she was so pleasant and made me feel comfortable. The staff and nurses that worked with her were absolutely amazing. So kind and caring. I would recommend them to anyone and I would definitely feel completely comfortable with Dr. Brenner handling any Gastrointestinal problems I had."
"My visit with Dr. Rufner was a great first meeting. He took all the time I needed to answer my many questions and make me feel very comfortable going forward with my procedure, especially in this time of Covid-19! Dr. Rufner has a very kind and understanding manor and I would highly recommend him to anyone looking for a gastroenterology doctor!"
"Dr. Rufner is excellent. This was only my first appt. so I will come back and update this review after my second. I was able to really talk to him and tell him everything and he listened really well and explained in detail what I needed to be educated on and the procedures we would be doing together to find answers to get to recovery. I also can't say enough good things about NeNe his scheduler. She has a great caring personality on top of being efficient. What a find in an employee. I will again up date this later but I recommend going to him for any GI needs."
"i have seen Dr. Sieja twice.He is personable and very detailed with his approach to my issues."
"Was wonderful everiting good profesionals"
"I finally feel like i am in the right hands for this nightmare of a stomach i have going on. More after solved."
"Dr Rufner took the time to listen carefully to my issue and then explained to me in detail the possible problems and solutions. He was very professional and personable and I greatly appreciate him researching out my file prior to my office visit. He attention to detail and professionalism is greatly appreciated."
"Dr. Rufner always takes the time to deeply listen to the GI issues I have faced, and then puts together comprehensive plans of how to move forward with treatment."
"Dr Brenner has always been very responsive to my illness and needs. I do have some questions about the side effects of the biologic she’s proposing but I am confident the she will explain completely! Thank you, Dr. Brenner!"
"The doctor was attentive and listened carefully to all of my concerns. He did not seem to be in a hurry and was east to talk to."
"Dr. Rufner was attentive and very informative. Took the time to explain and address any of my concerns. Front desk staff as well as the MA was very friendly."
"Dr. Rufner is amazing! When I leave the office I feel like he listened to me and came up with a solution. He also explained in detail exactly why he was choosing a certain medication for me. After years of no explanation for my stomach pain, he found an answers for me. I highly recommend him."
"Dr. Ruffner is great! Really nice guy who seems to genuinely care about his patients."
"My partner Mark says Rufner is great, willing to spend time with patients. His office staff is personable, efficient, professional. Top notch service. Worked with my insurance. No problems."
"Dr. Brenner is SUPERB!"
"Dr. Rufner's friendly, yet professional manner creates a relaxed atmosphere in which it is easy to discuss health issues and symptoms."
"Both Dr. Rufner and Scott, the Front Office Manager, are best-in-class. Dr. Rufner has excellent bedside energy, and he is a very intelligent and thoughtful professional. Scott is perhaps the most proactive office employee I have ever encountered -- refreshing! I highly recommend this office!"
"Everyone in the office was super friendly and professional."
"On time, very pleasant personality, easy to speak with, would recommend her to anyone requiring a doctor in this specialty"
"Prompt service, staff very cordial."
"Dr Seija and everyone at the office are so lovely and professional. Sometimes there is a bit of a wait for an appointment because they are so popular, but it's worth it. It's always an informative visit and I come away feeling reassured with ways to manage different conditions."
"Great as always!"
"Dr. Ruffner was very professional and informative. He took his time with me, I never felt rushed, left his office feeling empowered. Thank you"
"Accessible, professional care. Dr. Rufner is one of the best!"
"I get treated like I’m the only person there. Everyone is so friendly and professional I just love it. It makes going to the doctor not so bad. I met Dr. Rufner for the first time today. He has a wonderful bedside manner. I don’t remember laughing so hard in a doctor’s office in my life as I did today. I would recommend Colorado Gastroenterology to anyone. Way to go CG!!!"
"I was very impressed with Dr Rufner. He had a informative and caring bedside manner. I will definitely recommend him to family and friends."
"Dr Brenner was very helpful with my stomach and throat. She explained the 3 items that I may be having. She decided to start with a "Flip". Scheduled this for Dec 26. After results, she will go to the next step."
"I loved Dr. Brenner! She’s knowledgeable, focused, willing to listen, very straight forward (I like that) and caring. She’s down to earth, no beating around the bush, explains everything till you’re confident you understand. The office was very efficient in getting procedures scheduled, gave clear, written instructions, and answered all my questions."
"I value Dr. Rufner's professional and personal courtesies, particularly his clear explanation of diagnoses and his warm interpersonal skills."
"Office is very efficient and Dr. Sieja really listens to what you have to say."
"Great office. On time for my appointment. Dr Brenner is personable and thorough."
"(this is Torie Vandeven, not angie rovetta.. she is my partner and emergency contact, fyi.) Dr. Brenner is an excellent listener and is focused on my particular health issues. She is very thorough, and successfully diagnosed a condition that other gastroenterologists were unable to do.tav"
"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."
"Dr. Rufner is awesome. In less than 30 minutes he explained to me about my multiple health problems and what could be causing them. Been waiting 20 years for some of the news i got today. He is very compassionate, makes sure i understood everything and he has a great caring personality"
"Amazing! They actually answer their phone. They actually make an appointment when they answer the phone. How is it they can do that? No one else in gastro does that. "Sarcasm." They took very good care of us totally worth the drive from the Springs where no one answers their phone or website requests for appointments. I hope they stay amazing but sick people need to know they can find care for gastro issues without the hassle. Stay amazing and be blessed!"
"In August I had a colonoscopy with Dr. Rufner at the Golden location, and a few weeks later, my husband had his done in Denver. Dr. Rufner is the best in every way you want a doctor to be. He explains EVERYTHING and spends as much time as you need. I guess that's called a good bedside manner. Additionally, the folks that work on his team are fantastic. The receptionist immediately greets you with a big smile and makes you feel welcome. Then, the nursing staff takes over and they couldn't be any nicer and did I mention how efficient, professional and kind they all were? Anyway, I can't say enough positive about these folks and want to thank everyone at Colorado Gastroenterology for making a difficult procedure almost enjoyable."
"If it matters, I had a good experience. My procedure was painless, I feel good the next day without any adverse effects. They even called the next day to make sure I still have a pulse. Never hard to get them on the phone and everything was spelled out nicely. I recommend."
"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."
"Very nice visit with Dr Rufner."