Patient Reviews
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.
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"Great experience overall!"
"He was very nice and listened to my concerns and the people in the office are also very nice."
"Dr Marek is very professional,thorough and has a genuine personality. I'm very satisfied with the treatment we receive as patients of his."
"Very professional and caring Dr. and staff."
"Great Doctor with great supporting staff and great outpatient facilities.
Nice to have a staff member checking on patients follow up call afterwards as well."
"I had a colonoscopy for the first time and I heard horror stories so I was a little apprehensive about the procedure, but I am here to tell you that was not the case with Dr. Marek. Everyone on his staff so helpful and put me at ease. They did a great job and I would definitely recommend Dr. Marek."
"Dr Sharon J Marek friendly and professional and answered all questions."
"Dr. Marek is great! He takes time in giving thorough explanations and allows time for asking questions. He's caring and calm, not rushed. I highly recommend him!"
"Very pleasant, knowledgeable folks."
"Very good first visit, Dr. Shannon Merek was very thorough, he appeared very interested in my case, answered all of my questions and had pertinent questions of his own. I look forward in working on my issues with him in the future. Jim Demshar"
"Dr Merek is the best. He has a great bedside manner. Takes time to answer all questions."
"Extremely pleased with Dr. Marek, he is a good listener and takes time to talk and explain procedures and diagnosis. Would highly recommend"
"From the first visit through the completed procedure my experience was handled very professionally. I have turned to Dr. Marek previously and have been very please each time on his thorough process, attention to details and sincere patient care. I would highly recommend Dr.Marek to anyone in need of his professional care."
"Dr. Marek is a wonderful doctor, very caring. He answers all questions and is very attentive. I highly recommend him!"
"Excellent first visit. It was very informative."
"Very impressed with Dr. Merick and the facility. The nurse staff was professional and friendly. Dr. Meeick was knowledgeable and professional. Would definitely recommend."
"Fast friendly service ,
More importantly
Peace of mind
Job well done to you and your staff ."
"Dr Shannon Marek recently performed a colonoscopy for me August 30, 2021 and did an excellent job. Now (Nov 15, 2022) my primary doctor sent me to Dr Marek to investigate a high bilirubin count that showed up on my Annual Physical. Dr Marek discussed what he wanted to do just to make sure we explored all possibilities of what could be causing this issue. Was very laid back and not rushed. Answered all my questions. Great experience."
"Dr. Marek and his team were friendly and thorough. I feel all my needs will be taken care of."
"I am very pleased with the services provided by Dr. Marek. I like his staff and the office and other facilities are very clean. Anytime I have called I have not had to wait on hold and am directed appropriately to the correct staff member. Both I and my husband both see Dr. Marek."
"I love Dr. Marek and his office staff! They always take good care of me and my husband!"
"Dr. Marek and his staff are attentative, friendly and knowledgeable!"
"Very professional, caring and thorough"
"We had an awesome experience with Dr. Shannon marek. my daughter needed attention and he got to her and put in a peg tube. he took care of it immediately awesome."
"Very nice Dr. Informative and polite. This was my first visit."
"Wouldn’t go anyplace else! I started with Dr. Marek and will continue even though I live 3 hours away."
"His nurse always calls me back when I have an issue and he always listens and addresses my concerns. I have had colonoscopies and endoscopies. He is amazing."
"Best experience with a procedure with a Doctor that I have ever experienced"
"Dr. Marek is a very kind professional individual."
"Dr. Marek listens to your concerns in a very intent
intent manner. He offers
the patient with deft
information and plausible
treatment methods."
"Everybody was courteous and the facility was top notch,the procedure went well and the results were good no problems at all.Dr.Marek covered everything start to finish.
Thanks"
"He is a great listener and isn't quick to throw medication at a thing. He is friendly and professional. I would highly recommend him."
"Dr Marek takes a personal interest in his patients He cares about them not only feeling better but reaching total remission. The nurses and staff are always so nice and always helpful. God bless you all."
"(Translated by Google) I highly recommend Dr. Shannon Marek, the attention of the Doctor and his staff is first-class, thank you very much
(Original)
Recomiendo muchisimo al Dr. Shannon Marek la atencion del Doctor y su staff es de primer mundo,,,,muchas gracias"
"I have been a patient of Dr.Marek for quite a few years and am totally satisfied with him.He is very easy to talk to and explains things very clearly.You always come away feeling that he really cares about you and how you are doing."
"Dr Marek is a top of the line Dr. Thorough and knowledgeable. His assistant Mariah was truly amazing at making things happen for me. Can't say enough good things about the whole experience."
"Great Doctor"
"I always get nervous and uncomfortable when having to talk with any Dr. About having a medical procedure done because I’m sure we all know there’s always a chance a complication may occur. But with Dr. Marek , I feel completely comfortable when he explains the procedure and the temperament on how he treats his patients just assured my faith in him caring for his patients and well being is sincere."
"The entire colonoscopy experience was so professionally handled and the staff was amazing. Could not be more pleased with Dr Marek and the Christis staff"
"Dr. Marek is absolutely outstanding. One of the few doctors that actually take the time to spend with their patients. Dr. Marek is extremely knowledgeable and has a great sense of humor. I would recommend him to anyone in need of a Gastroenterologist -"
"I had a very positive experience. I will be going back to Dr. Marek in the future ."
"Knowledgeable, professional, and displays concern for patients."
"Dr. Marek is talented AND has a sense of humor!!!"
"Dr Marek takes a personal interest in his patients He cares about them not only feeling better but reaching total remission. Plus he works with you to try to get the best treatment that your insurance will cover to reach that goal.
Kimberlee Doran"
"Excellent nursing staff took wonderful care of my wife during visit for her colonoscopy. Dr. Marek is a fine doctor ."
"Seem very confident and likable"
"The doctor was very professional and thorough. We were running late for showing up at the wrong office location and we were kindly accommodated."
"No one in their right mind would rave about having a colonoscopy however if you must I can not say enough positive things about Dr. Shannon Marek, his crew of nurses and the facility. His bedside manner and sense of humor is wonderful. His staff are very caring, helpful and very positive. The procedure was uneventful and went very fast. The prep however was a pain in the butt no pun intended. I am very fortunate to have Dr. Marek as one of my doctors. I highly recommend him."
"Dr.Marek always does an amazing job of finding out what is wrong and coming up with the best possible solution ms. The best GA ever."
"Dr. Marek is caring and kind and so is his staff."
"Dr. Marek is a wonderful and professional physician. He explains everything too you and talking to him is like talking to a good friend. You don’t leave his office not knowing what he just said, he explains it all from beginning to end (no pun intended) he speaks to you in plain English.This sounds old school but Dr Marek has a firm hand shake which means to me I can trust him and you should too."
"Dr. Marek and his staff consistently provide excellent care. Dr. Marek has an excellent bedside manner with his patients."
"Dr. Marek and the nurses, anesthesiologist and staff are top notch. Everyone is super professional, has a great bedside manner and they go out of their way to make you feel comfortable and cared for."
"Others have praised Dr. Marek and staff more eloquently in the past but they have consistently take care of my every need and concern over the decades."
"The Dr. Marek and the staff at Christus Santa Rosa are friendly, professional and strive to keep you comfortable. Dr. Marek is also great at laying out medical terms and options so you as a patient understand."
"Dr Marek is an excellent Dr. I highly recommend him! I have brought two issues to him that other doctors didn’t understand. He has helped me tremendously."
"Dr. Marek is a wonderful doctor. He is honest and to the point without being rude or pushy. He truly cares for his patients."
"Dr Marek takes time to listen and ask questions for clarification about my current status. I appreciate his openness and honesty."
"Dr. Marek has been helping me for over five years. I always feel better after any treatment or consultation with him. He's a very professional yet personable position. I trust him implicitly greatly appreciate the help I've received from him"
"Highly recommend. He listened to me and treated me like a human not a number"
"Best GI care I've had. The Doctor paid attention to what I had to say, was engaging and friendly. His staff is much the same."
"Dr Marek is very personable, professional and thorough. In this age of so much stress and confusion, it was so comforting to be in the hands of someone I could completely trust. Highly recommend!"
"I was in and out unlike some doctors were ghey place you in a room and make you wait an extended amount of time. Doctor was to the point and informative. Im glad im in his care."
"I love Sr. Marek, hes very compassionate and caring and always very detailed on whats going on. Couldn't have asked for a better doctor."
"Very excellent care was provided me by Dr. Marek and all those on his professional staff. Everyone was kind, considerate, and very knowledgable about their work. I feel 100% confident in planning any future care with Dr. Marek and his very competent staff."
"This Doc has the perfect personality and demeanor to get you to Think. I question everything... and, he is sharp enough to not intimidate but to guide one through all of the peaks and valleys of your problems. I probably shouldn't mention this but he reminds me a lot of my son, who is also a doctor."
"Great people to deal with 😉,I highly recommend them, this is my second time around."
"Caring physician let me talk and listened to my ailments. Set our next course of action. Instant respect."
"Dr Marek has been taking good care of our family for some time now. He and his staff are very thorough and take time to explain every procedure. I highly recommend for you digestive issues!"
"Great experience with Dr Marek and staff! The receptionist (Taylor) was so patient and courteous on the phone, very helpful!! And Dr Marek was professional and had me feeling confident with the care he was giving immediately. So happy I was able to see him. Highly recommend him!!"
"Dr. Marek and his staff are so caring! Dr. Marek listens and allows me to relay to him what is going on. Thanks Dr. Marek and your staff!"
"I had the best care with Dr. Marek's staff,and his personal care from the beginning.
I was scared only thinking of the procedure I had to have.
Having the reassuring talk with the Dr beforehand, and the experience preoperative, during,and after care was more than I expected, or could've asked.
So..thanks again!"
"Great Doctor, patient and caring. Would definitely recommend Him."
"The staff and Dr Marek were all great at putting me at ease and before I knew it the colonoscopy was over."
"I was very nervous about having my procedure, but Dr. Marek took the time to answer all of my questions and address all of my concerns during my initial visit. The day of the procedure, he again asked if I had any questions or concerns and he explained the process with great care. I also appreciated the rapport between the hospital staff and Dr. Marek. They worked so well with each other and made sure I was comfortable every step of the way. Thank you for making this process so easy and stress-free! I wouldn’t trust my care to anyone else!"
"Wonderful and helpful staff. They take their time and answer all your concerns and make you feel welcome."
"Dr. Merek and his staff are wonderful. I was treated with care and respect."
"Dr. Shannon J. Marek is attentive and caring. He took time to listened to me even after he knew he was going to have to send me to a surgeon. He is a rare, compassionate Doctor."
"Great Doctor & staff"
"Dr. Marek is the best doctor I have had in many, many years. He listens and genuinely cares about his patients. He takes the time to make sure you are comfortable with your treatment and care."
"Dr Marek is professional with a wonderfully caing attitude about your care and needs. He tells you everything that is going on with you and your health issues and the procedure that is going to be performed. It is very hard to find a doctor with Dr Marek's pleasnt personally and genuine interest in your well being. He will forever be my doctor."
"Such a awesome doctor,he gave me a lot of info on how to take care of myself. Thank you Dr Marek."
"Was a very professional and caring experience. Dr Marek explained everything that was going to happen. His staff were so nice. Took very good care of me."
"I had forgotten when had test done or who with but when my heart Dr set me up for some test it was Dr Marek happened to be the same one used several years before what relief he already had my records . Great staff to."
"New doctor for me .Intake and test scheduling visit. Staff very nice . My name was incorrect on all paperwork. This was fixed . Some miscommunications with lab ."
"I absolutely love Dr. Marek! I moved to Texas from Colorado last year and was worried about finding a gastro Dr. that would be as good as the one I had there. Dr. Marek has exceeded all my expectations and has done a great job of helping me stay stable and comfortable managing my Crohn's. He always answers questions and never makes me feel belittled when I ask a question that is kind of dumb. Both in person and virtual appointments he has been kind and present. You know you have his full attention when he is with you and you know he cares about your health."
"The entire experience was exceptional. First of all, when I was received from the waiting room for the procedure, every staff member was upbeat, cheerful, and friendly. Everyone knew exactly what they were doing, explained what their role was to me, and made me feel as comfortable as possible. When I met with Dr. Merak before and after the procedure he was cheerful, knowledgeable, and friendly. I was extremely impressed with everyone’s professionalism combined with warmth and friendliness; which greatly reduced anxiety and stress. My personal thanks to the entire staff for the great treatment they provided me."
"Would recommend Dr. Marek & his staff to others. In fact, he also took care of my husband. By far,
Dr. Marek & his staff are outstanding, professional, and sincerely care about their patients. If I could I would definitely give them WAY MORE than 5 Stars."
"Dr. Marek is very professional, knowledgeable, empathetic and extremely thorough. He has been proactive in my treatment and this has blessed us with peace of my mind."
"Dr. Marek is a good physician he cares about the patient as if you was part of his family. Most of all he is very honest and cares about the well-being of his patients on a professional-level."
"Dr. Marek is easy to talk to while explaining what is going on and made me feel comfortable, which is so important to me. Although I am a new patient he seems to be thorough and accommodating to extenuating circumstances. Mariah is awesome also! Everyone at the facility was friendly and extremely helpful. I would highly recommend and I am glad he is my doctor!"
"Dr. Marek is an excellent doctor. He is very easy to talk to. I would highly recommend him."
"Dr. Marek is amazing!! He really listens to the concerns you have and makes you feel confident in the decisions he makes. The staff there is very pleasant to work with! Love it there"
"Dr. Marek solved issues I had suffered with for years, that many other doctors never did! He listened and was very thorough in the tests he ordered. I feel better than I ever have and am so grateful for his wisdom and dedication."
"Dr Marek is always professional, yet caring. You don’t feel like just another patient with him, but like a person to him."
"Very knowledgeable. She didn’t treat me like family. She treated me with respect and kindness. Much better than the way family treats me. Got knee cortisone shots in my knee. No an unpleasant experience. I would recommend their staff highly."
"Dr. Marek made the colonoscopy experience easy and comfortable for me. I won't mind having my next one."
"Dr Marek MD and his staff are the most personable, compassionate, informative healthcare team I have encountered since moving back to Texas. Gentle in nature and thorough in ability and patient and family centered care. My husband was so comfortable and impressed with the team that when it came time for his colonoscopy, he requested to be referred to Dr Marek MD."
"He is very friendly, he will actually speak to you and answer any questions you have."
"He is a great doctor. He takes time with patients to explain things. I'm taking two medication pretty expensive he help me to apply for programs that help me. When I call the office because I need to see him they give me the appointment I don't have to wait like other doctors. The staff are great very helpful . They give you a chance to explain why you there in the office. some other office you don't even have a chance talk they think they know everything. I think I'm alive because of him."
"Very friendly staff at the front desk.
Nice facility in New Braunfels.
Dr. Marek was kind and informative."
"Dr. Marek has been my Gastro doctor for over 8 years. I have autoimmune disorders and have several issues. Dr. Marek is always kind and very thorough. He addresses each one of my issues separately and gives me the best care he can for each issue. He puts up with my million questions, and articles I might bring him to make sure I don't have this or that disease! Overall Dr. Shannon J. Marek is a great, kind, loving, and happy doctor. I recommend him to other people seeking a Gastro doctor as often as I can. Thank you, Dr., Marek."
"Dr. Marek is an excellent physician. He always great people with a smile and takes the time to listen. He share genuine concern for his patients and their health. Dr Marek that take time explain any situations and treatment plan in plain words, without condescension."
"Dr. Marek did my colonoscopy almost 10 years ago, and I was very pleased with the results. I am happy to know that he'll be doing the procedure again. His assistant is also very knowledgeable. She explained everything to me. I got the info she shared with me on paper so if I have questions, I can call her."
"Dr. Marek and his staff are always so pleasant, make you feel very much at ease and cared for. Dr. Marek takes the time to discuss and/or answer any concerns."
"Great team of Specialists"
"Dr. Marek gave me great thorough care. I am happy things turned out as they did and for his explanation of my results and his recommendations. I just haven’t received results of the capsule study though. Hope to hear from them soon with those results"
"Actually it’s Susan truly felt respected and cared for ."
"Very complete conversation. Understood what was required of me. Not a pleasant experience in the preparation of this procedure, but I feel comfortable with the Doctor who will complete it."
"Dr. Marek is a great doctor. He explains everything to you and makes you feel very comfortable."
"Knowledgeable and thorough. Fantastic bedside manner. Takes his time and discusses your issues, goes over treatment plan at your pace, and ensures you have a thorough understanding before leaving. His staff is extremely courteous and just as professional. Highly recommend!!!"
"Doctor Marek is great, he cares for his patients and he loves Veterans."
"Dr Marek is one of the best Gastroenterologist I have visited. Very nice, Knowledgeable and easy to talk with."
"Dr. Marrek was my Dr. Yrs ago! He figured the problem out and has been doind day surgery ever yr. He goes in my throat and stretches my esophagus. Very good Dr! Great bed side matter...if you need any of these or other question just call them! Great Dr"
"Dr Marek is the best!!"
"After countless different doctors, multiple emergency room visits and thinking I was going crazy I finally found a doctor who took the time to listen and run a scan that I had never heard of. The staff was amazing and the dr was understanding and didnt rush me through my appointment. I am so happy with the service I received from this office."
"Dr. Marek was extremely nice!"
"Dear Dr. Marek:
I am responding to inform everyone of the exemplary way you provided service to me. Everything in my dealings with you exceeded my expectations, from your timeliness, professionalism, disposition, thoughtfulness, humility, patience and especially your willingness to be sure if we have questions or concerns that you took the time to address them to my satisfaction.
I will gladly recommend you to anyone who needs services such as yours and I will be back as needed.
Thank you very much and may God bless you.
Sincerely;
Bill"
"If I could rate Dr. Marek higher, I would. I went in to his office extremely nervous but he made me feel at ease by the time I left his office. I knew I was in good hands when he said "have a blessed day." That spoke volumes to me!"
"DR. Marek is one of the finest clinicians in his field. As a retired Army clinician, I find that DR. Marek operates at the highest level of professionalism, state of the art practices and holds his staff to the same standards. Truly a rare find from the apathetic and disengaged doctors that predominantly advertise big and deliver small.
DR. Marek is an outstanding individual, his skill set and clinical knowledge are second to none, maybe I need to swear him in and get him an Army uniform. I’ve always felt that delivering anything less than world class health care is failure, you will be treated with respect, your condition explained in detail and your questions answered. His staff is a reflection of his personal desire to deliver the finest care possible. There is no one better.
CPT Ken McKenzie, RN APN, CEN, CFN
US Army (ret)"
"Dr Marek is great. He had an aggressive approach - not just 'try these antibiotics' and now my chronic problem has been solved in weeks!"
"In spite of a significant wait I would absolutely recommend seeing Dr Merick in the New Braunfels location at 2028 Sundance Parkway. Although we were not told a reason, Dr Merick himself apologized on 3 occasions for the wait. The Medical Assistant and front office followed with their own apologies.
Dr. Merick is totally engaged while in the exam room. All of my questions were answered and I left feeling confident in the upcoming procedures."
"Great staff, great care, and promptly responds to questions and providing results of test. I can't ask for more from a healthcare professional!"
"I’ve even a patient of Dr. Mareks fr about 5 years. He is an outstanding young Dr. in every way. Procedures he has performed in every instance been spot on!"
"I was very pleased with my first appointment with Dr. Marek. He is very polite and professional, and he listened to me explain the problems I’ve been having with kindness and understanding. I feel very secure with Dr. Marek as my physician and would highly recommend him."
"Dr. Marek is great. Staff is wonderful."
"I have been seeing Dr. Marek for several years and can't say enough about him. He has truly saved my life. He talked me into finally having the procedure that I was so scared to have by outlining exactly what he would do and what the experience would be like in an understandable and caring manner. I am SO GLAD that he did. As much as it hurts me to say, HE WAS RIGHT! I had a large mass and he was able to remove the entire mass during my scope and I didn't need any surgery! I went to see an oncologist who couldn't believe that Dr. Marek was able to remove the mass and she told me that most other gastroenterologists wouldn't even have attempted removal. I needed no further treatment and am cancer free because of this man and his personable bedside manner! I am so thankful to have found him and refer him to as many people as I can."
"It’s the first time I saw Dr. Marek and he was great. Explained a lot and is running the needed tests to determine what is happening!"
"Highly professional. Was interested in what my concerns were and addressed them. I highly recommend Dr Marek"
"The man has style, and is a fantastic Dr."
"Dr. Marek had the best bedside manners of anyone I've ever visited. He made my mother feel very safe and cared for. Excellent treatment of us!"
"Dr Marek, I found to be kind, caring
and quick on his decision making"
"great experience for my 90 year old dad. Thorough examination and they were able to expedite upper endoscopy for the following day. Results have been great - appreciate the concern all expressed to my dad - made him feel more comfortable. Highly recommend Dr. Marek and his team."
"Great Doctor! Listens and provides recommendations that make sense. My wife and I both highly recommend Dr Marek."
"He is a great Doctor. Friendly and knows his profession."
"Dr. Marek has to be one of the best doctors I have ever been around. In my opinion, he is very competent and takes time to explain things."
"Dr. Marek was fantastic dealing with a 92 year old patient. Would recommend him to everyone!"
"Very satisfied with Dr. Marek...his bedside manner, & his professionalism. I would highly recommend him to others."
"Glad I was able to find Dr Marek for my GI needs. Very competent and left his office feeling hopeful in my care."
"Dr. Marek is very personable, easy to talk to. Very thorough."
"Dr. Marek is quite knowledgeable and one of the best listeners I know of. He is sharp in diagnosing issues and respectful in the way he deals with
People/patients. Dr, Marek always has responded well to my concerns and questions. I have never felt rushed with him."
"Dr Marek is the best GI Dr in town! I highly recommend his office."
"Dr. Marek is a great guy. He listens very attentively to concerns and is truly interested in his patients and how they are doing."
"Great office staff and Dr. Marek is extremely nice and very informative."
"Excellent experience, Dr. and staff are friendly and personable. Highly recommend."
"Very efficient support staff and clarity of communications by Dr. Marek. I'm very pleased with the whole experience."
"Dr. Marek was one of the few doctors I've met who sat down and talked with me for a while to chat about my health and questions. Without feeling like I was being rushed. He was friendly and kind.. a great disposition. I'd recommend him for sure."
