GI Alliance physicians are among the most reputable and distinguished gastroenterologists across the nation. Focused on clinical excellence and patient-centered care, our specialists seek to be the partner you need in your quest for better health. We value patient feedback and appreciate every review we receive from those we are privileged to treat. For your convenience, we have gathered a collection of reviews, stories, and testimonials provided by patients who have visited our practices. We welcome you to explore the feedback below to learn more about what it means to be a patient of GI Alliance.
"Dr. Mark Miller is a great doctor. I have seen him for years. He is always informative and I truly appreciate him. He puts you at ease before procedures and his support staff and NP are the best. Highly recommend!!!"
"Mark Miller is a very thorough doctor, he sets down and talks to you and ask if there are any questions. The only problem is you have to wait 6 months to see him."
"Dr Miller was outstanding. He put me at ease immediately. Dr Miller’s knowledge and experience showed in his pre-and post- procedure explanations. I would highly recommend him!"
"Dr. Miller immediately put me at ease before my procedure. Very impressed by his bedside manner and the respect the other staff had for him as a surgeon."
"Dr. Mark Miller and his team exercised professionalism, courtesy, empathy, care and compassion during my medical procedure. It started early and before I knew it I was back in the recovery room. I chose Dr. Miller because of his care for my mother prior to my procedure."
"Dr. Miller and staff are top notch! From the time I walked in the door until I left I was provided the best care a person could ask for. Everyone loves their jobs there and it shows with the way they treat their patients. Dr Miller has a great sense of humor. When he walked in and introduced to himself to me he told me "it's Miller time." Everyone I encountered that day had a smile on their face and genuinely cared. I trust my health and well-being with this team now and in the future. I highly recommend Dr Miller and staff!"
"Dr Miller is exceptionally knowledgeable and personable. I have been to him now 3 times over the years, as well as my wife. We could not be more pleased with his professionalism. He comes highly recommended!"
"Tried to make an appointment, and can’t get in to see Dr. Miller until January (5 months away). And his assistant isn’t available for another 2 months! He must be REALLY good, but my personal experience wasn’t, as I will have to find someone else now. Follow up. Above post related to an attempt to schedule an office visit. Recently, Dr Miller just completed my colonoscopy. Outstanding! Very attentive, patient, and efficient. Answered all my questions both before and after the procedure! Changed my review to 5 stars! Thanks!"
"Dr. Mark Miller and his staff is a first class medical team. This was my first time having a colonoscopy. Dr. Miller was able to calm my fears. He met with me before the procedure and told me what to expect. My job was to take the solution, show up on time, sleep, wake up and get your results. No healing is needed. This is PM (Preventive Maintenance) for your body! Don't be someone that schedule oil changes for their car and won't make sure all is well inside your body. When it's time for you to get this procedure, do it! It's nothing like knowing what is going on inside of you. I highly... recommend Dr. Mark Miller."
"Dr. Miller is a warm, caring and fantastic doctor. He answers all questions thoroughly and spends time with you to explain your problems. I have seen him for many years."
"Love Dr. Miller! He is so attentive to the care of his patients. Due to results of labs, they moved my appointment up 2 months. He called on a Sunday to give the results of a procedure and next steps."
"Dr. Miller is awesome. He was quick to come into the room to see me. Talked to me directly, not on the laptop. Knew my history, he addressed my concerns and offered options with rationale! He is very personable and always makes me feel comfortable to talk to him."
"Absolutely thrilled to have Dr Mark Miller as my medical Gastro Intestinal Dr.! As a supporter of the Specific Carbohydrate Diet he understands the SCD value of the correct foods nutritionally for gut healing. Im grateful to have him on my team in this healing journey."
"My wife saw Dr. Miller and we were impressed by his professionalism and the high standards exhibited by his staff. Ann Parker, RN,and Bernard Parker, MD."
"Dr. Miller and the medical staff that helped me on the day of my procedure were kind and friendly. They made me feel comfortable by explaining every detail that was going to happen that day. Thank you for making me feel less nervous that day."
"This office in Garland is okay but I much rather prefer the one in Rockwall my experience was awesome Dr Miller is one of a kind he is very experienced in his field of work I wouldn't trade him for anything"
"Go figure, a doctor that wants to listen to you. I can not explain how wonderful it was to have a provider listen intently to my input. Dr. Miller addressed each of my concerns and helped me understand the full scope of what my treatment would look like. Excellent physician."
"Bri just called from Dr. Miller’s office with my colonoscopy biopsy results. 👏👏 She was very professional, personable, and helpful in explaining everything and, as I suspect, Dr. Miller already knows that Bri’s a keeper."
"Everyone I cane in contact with was absolutely awesome! Dr. Miller is the best. He doesn't rush through the interview and tells you everything he will be doing, how long it will take and everyone that will be assisting him."
"Dr. Miller is a great Doctor and surrounds himself with quality people. Cant say enough about the level of care from this office and the people who work for Dr. Miller. Top notch!"
"I've been using Doctor Miller for 10 years now. He has great bedside manner and his staff is extremely nice. They were very accommodating on my last appointment. I would recommend Dr Miller."
"Dr Mark R. Miller is very experienced in colonoscopy area. His professional and experiences have made thing easy and helpful for patients. The colonoscopy process went very smoothly. This is the third time I see him in 15 years period. Thank you Dr. Miller"
"Dr Mark R. Miller is very experienced in colonoscopy area. His professional experience have made thing easy and helpful for patient. The process went very smoothly. This is the third time I see him in 15 years period. Thank you Dr. Miller"
"Dr Miller was very nice. he spent alot of time answering my questions and discussing my issues. He was very comfortable to talk to. He was very thorough. I would highly recommend him"
"Dr. Miller is very intelligent and compassionate. He always takes time to listen, ans very thorough with his explanations of my issues and treatments. He is a wonderful physician, and have recommended friends and family to him many times."
"Dr. Mark Miller a compassionate and caring doctor who will take the time to listen and communicate with his patient. I appreciate the time Dr. Miller spent with me even with his busy schedule."
"Doctor Miller is one of the best doctors that I've ever used My husband and I have been going to him since 2008 Amazing staff and Brianne has been there ever since I could remember. Highly recommended office."
"After a referral from Wylie ER for Dr Miller, the appointment went very well. Dr Miller is very knowledgeable and easy to talk to. I really appreciate all the staff at his facility they too were very kind and professional. I am pleased with the results."
"I have been a patient of Dr Mark Miller for many years and I'm always so grateful for all he has done for me. He is very professional and caring, he takes time to listen, give advice, to explain and to answer my questions."
"One of the best doctors around!! So caring and truly taking care you and helps you understand your health and potential issues! I can’t recommend him enough to everybody. Thank you Dr Miller for your care!"
"Hands down, one of the nicest doctors I’ve ever met. Very personable and friendly. He gave a thorough explanation of what would happen during the colonoscopy. His office uses a different company to find the prep meds in order to get you the best price. This worked great for me bc my insurance company refused to pay, but I only ended up paying $60 when it would have been almost $300. Recommend."
"This doctor is wonderful, very knowledgeable, thorough and down to earth with completely easy to understand explanations. If you're having problems, in the end then this is you're go to guy!!!!@"
"I don’t like going to see doctors! Dr. Mark Miller puts me at ease right away. He came into my exam room fully knowledgeable about my health history, like I am his only patient. It is 2023 and he brought up a procedure I had with another doctor in 1998. He seems very knowledgeable about Crohn’s Disease and other digestive disorders. I highly recommend him as a gastroenterologist!"
"I have known Dr. Miller for over a decade. He is very nice, intelligent and cares about his patients. He doesn't over do but, he does what is needed to make an accurate diagnosis."
"Dr. Mark Miller is the best. Highly recommend, been to him several times. He’s so considerate and sensitive to your needs. Always go above and beyond to make sure your comfortable all while getting the job done in a timely manner."
"I have been seeing Dr Miller for several years. He is very professional and knowledgeable in his specialty. He is very easy to talk to and communicates very well."
"I love how Dr. Miller listens to all of your symptoms and concerns and go over everything with you, he explains with details and even with a picture! I highly recommend him."
"I'm a registered nurse and a patient of Dr. Miller. He has the best bedside manner of any Doctor out there. He is extremely knowledgeable, kind, and funny. He will be my GI Dr. Until I'm an old man.."
"I really like Dr. Miller because he is so personable. I’ve had multiple occasions when he has called me at home to check and see how I was doing. There at not a lot of doctors that do that anymore!"
"I have been a patient of Dr Miller for several years and will be for many more. He and his staff provide excellent care, on target diagnosis and always make time to explain all details. Wonderful doctor and team."
"Dr Miller and his staff always make me as comfortable as possible. They’re friendly, professional, and provide as much information as is needed to feel confident about the procedure. I’ve seen him for the last three colonoscopies and wouldn’t consider going to anyone else."
"Dr Miller is hands down the best GI doctor. I have switched doctors several times because I just wasn’t happy with their care but Dr Miller is it for me. I have Crohn’s as well as another rare disease that causes GI issues so I need a GI doc that can handle my issues and he is the one!"
"Great doctor and great nurse. Hard combo to find. Super responsive duo. Dr Miller has been treating my UC for 18 years. He allows you to have an active part in your treatment options. Wouldn’t see anyone else. Very caring."
"It's hard to describe when a physician is great at his job and a joy to see, but thus has been my experience for over 10 years with this fine gentleman and I encourage anyone with the need to not hesitate to choose this practice!!!!!"
"I had a great experience visiting Dr Miller, he was very professional, attentive to m needs and concerns and not n a rush to get me n and out of his office"
"The staff was amazing! Dr. Miller was very personable and genuinely cares about his patients! He took the time to explain the entire process/procedure from start to finish. I'm extremely glad that I chose Dr. Miller to do my procedure."
"Dr. Miller is one of my 2 most favorite doctors. Qualified/ caring/ professional/ personable. I recommend him to everyone whether they need hom or not!!!"
"I have been a patient of Dr. Miller for 6 years and have always been happy with my treatment. Like any good group, they are busy. However, that has not impacted the quality of level of care I've received from Dr. Miller or his staff."
"Doctor Miller, his staff, and DHAT have been a large part of my life for the better part of 20 years now. They are my gold standard and so far no one has come close."
"I have known Dr Miller for over thirty years . He is my chosen one when it comes to my colonoscopy .. lol Always willing to answer all my questions . He is a very kind , caring, professional Doctor . I have referred many friends and family to him .."
"I have been a patient of Dr. Miller for several years. He is very personable and easy to discuss whatever problems you might have. I would highly recommend him to anyone."
"I really appreciated dr. Mark Miller for all his time and patience and explaining things in detail I recommend him highly if you are looking for GI doctor you will not regret it"
"Dr Miller is personable and even better he doesn’t keep his patients waiting so long like most physicians do. He cares about the patients and the caregivers and their time too."
"Dr. Miller has been treating members of our family for over 20 years. He is a wonderful doctor and person. Truly cares for his patients. Very kind while being very honest about any issues."
"Dr. Miller is an awesome doctor! He has helped me out tremendously over the years. I initially went for a second opinion and am so glad I did. My health issues are minor compared to some others with the same condition. He always asks for my input and preference on treatment plans and leaves the aggressive factor up to me. He fully explains everything in detail and always makes sure that I fully understand everything that is going on. He is also very easy to speak with and has a great bedside manor. He has never made me feel belittled or dumb for asking questions. If you need a GI doc then he is the go to guy as far as I’m concerned!"
"Dr. Miller has been my doctor for over 15 yrs and absolutely NO complaints He cured my HEP C!! 15 Years ago and still cleared and no need for 2 yr visits. Thank you doctor Miller!!"