Our team of compassionate, board-certified gastroenterologists strives to ensure every patient receives cutting-edge treatments using the latest in research and technology, so that all patients can have a positive experience that leaves them with better digestive health. We invite you to see what other patients are saying in order to get a better idea of what it may be like to receive care at our facility. All of our client feedback is taken to heart so that we can continue crafting positive outcomes for future persons requiring our assistance. When you have made an informed decision, please contact our location in Phoenix, AZ to request your consultation for GI treatment.
"As you enter, the waiting area gave me a bad impression as it seemed dark and overcrowded. However, dealing with the staff gave me a very different impression. The whole process was well organized. All the staff I met were caring and helpful. (Even to the point of having a case to store my contact lenses and holding a mirror for me as I put them back in!) The anesthesiologist was great and took away the fear. Dr Walker met with me before and after the procedure and clearly explained everything and gave a chance to ask questions. No one looks forward to having a colonoscopy, but the prep directions were simple and not nearly as bad as I feared. The colonoscopy itself seemed to be over in a second."
"They were great. The previous gastro I had visited was an awful experience, did not listen to me, provide any medication for the pain or explain anything that was going on. This doctor at Arizona Digestive Health took the time to explain everything about my IBS and gave me a combination of meds that are finally working and giving me relief."
"Dr Collins is a treasure of a doctor. O know if I tell you just how great he is you’ll want him as your gastrointestinal doctor and he’s already on overload patients. But truly you’ll never find such a careful and kind man as he. And so intelligent reference our bodies diseases and how to advise and treat us. He’s truly a treasure"
"After years, countless doctors, and countless tests to no avail, Lindsey has found the correct medication for me. My life is so much better and I can’t thank her enough."
"Arizona Digestive Care has been providing me with a high level of care to try to determine why my digestive tract is out of whack. They are super caring and thorough in their investigative efforts. I highly recommend them."
"I had a good experience at this dr. Office. The front office was very friendly and efficient. I saw Dr Megan Davidson for my dermatology exam. She is very efficient and caring. I have gone to her for several years."
"Shauna is an amazing NP. She listened to me, took me seriously and got me testing for what I came in for. She also caught an abnormal lab value and strongly suggested I follow up with my PCP since it was unrelated to my GI issues and now I have a mammogram scheduled thanks to her. Very well rounded, whole person focused care."
"Once I was ALLOWED to see someone, I was very happy with the office. Lindsay VanDam was fantastic. Next stop an endoscopy. Just not pleased with the hoops through which I had to jump since I had been a patient of another recently retired doctor. Very frustrated at having to receive PERMISSION to schedule with a new doctor/office. This was a practice rule rather than an insurance rule."
"Love the service I received from Lindsay and her medical assistant. Lindsay was not selfish with her time and made me feel like she genuinely cared about my health. Thank you for all you do for your patients!"
"Shauna is great! She takes the time to ask questions and gave me time to respond and she really listened. She ordered some tests that I think my primary care should have ordered. Her recommendations have already made a difference."
"What they do is important. Staff is welcoming and kind. I appreciate what you do. Not the most talked about conversations but screening is part of our DNA as human's Thank you for being part of the valley. Shout out to Dr Umar"
"The staff was nice and the nurse was outstanding. However, I was upset that we all wasted our time as the anesthesiologist they use is out of network and I wasn't told until I met with the nurse. That's very disappointing. No one has time to waste. Owers should review their policy in NOT telling pts until the appointment."
"Just was my pre-screening it went well I've had this procedure done before it was excellent now we have me scheduled for my colonoscopy this is a great place if you need to have a colonoscopy done"
"I always have an excellent visit, from the time I check in until I leave. The staff is professional yet welcoming. The doctor always makes sure I fully understand what I'm being told."
"The provider was very knowledgeable. She listened to my concerns that brought me there. She also included me in deciding what needs to be done. I felt happy that my visit to clinic was very productive."
"I have been going to Arizona Digestive Health since 2005 after my abdominal surgery. Dr Collins and Shauna provide amazing care. You feel as if you are the only patient they are seeing. Very caring and exceptional listeners."
"I have gone to Dr Walker for about 10 yrs. I find him to be very thorough and professional. I can't imagine going to anyone else for a gastro issue..The staff are excellent and make uncomfortable situations a bit better by their kindness."
"Shauna is very thorough and I feel confident in her abilities. I trust her and I do what she tells me to do. She answers all of my questions and I don’t feel hurried during my appointment."
"Quick & efficient check-in. Everyone very friendly, great customer service. Shauna ANP-C was excellent, very kind, thorough, easy to talk with and explains everything well."
"Well, I am sitting here, still with no paperwork. It's 1120am, my appointment is at 1130. The lady who helped me find a slot for me said I needed to be here at 11 to fill out new patient paperwork... they said I'll get my paperwork when it's my appointment time... soooo why in the world would you tell me to be here at 11? I had to leave a meeting early to be here by 11.. just irritating. We'll see how the rest goes... Update to come Ok, well, the rest of my appointment was great! Dr. Umar was very thorough. He listened patiently to my questions and concerns, then answered them to my satisfaction. His MA, Shannon was very nice, as well. Overall, I'm really grateful they could take me as a patient."
"Was referred to other doctors but they were not accepting any new patients until after Jan 1st. Still have not been able to do any follow up with the other doctors."
"Been getting my colon checked here for around 20 years now. Dr. Cho has always done a very good job. Pre-procedure appointment with Shauna and Troy went well and answered all my questions. Thank you!"
"This a very efficient facility run by personnel who care about their patients. The friendly staff make you feel important and give you their full attention. Highly recommend."
"I saw Shauna as Dr. Vulcano was not available. She is amazing. She explained everything to me and spent time telling me about any test that I might need. I would definitely see her again if needed."
"Dr walker is very caring and compassionate. Recently had a procedure done and everyone was so nice and comforting. Finally found a great place to get digestive issues resolved. Thank you to everyone who assisted in my care."
"Fantastic Doctors and staff! They go that extra step in dealing with your care! Thanks to that, I was in for my 1st office visit 8 years ago, and instead of going forward with a colonoscopy, Shauna admitted me to Banner with Stage IV ovarian cancer! Yes, I did get my colonoscopy, eventually. An easy process!"
"Dr. Vulcano was so nice and took the time to explain everything. When you are scared his kindness really goes a long way. The nursing staff and anesthesiologist were also wonderful and kind on the day of the procedures. His MA was also amazing and made me laugh after the PA scared me out of my mind with a possible dx. That's the negative experience I had. I felt there was no reason to throw out a frightening dx that I hadn't even considered with the statement "do you understand what that means?" which I did. It wasn't that thankfully but the weeks after, while waiting for the testing, were torturous. The rest of the staff from the front desk to the follow up call were fantastic. I will continue to follow up with this office as long as I live in AZ. I can't recommend this place enough. Truly amazing people work here. I'd like to thank them for everything they did to help me through this process."
"I have had succesful visits with two separate doctors and felt good about them. I especially like that a paper is given me of the things we spoke about that is a good reminder to me."
"My first appointment so I do not know much about how they will continue. I saw a NP, not a MD. She went over my problems with me, made a couple suggestions and ordered imaging. I thought she was very thorough. Hopefully this kind of caring treatment will continue."
"Probably the VERY BEST Dr. Visit that I've had in my 56 years. Lindsey has been AMAZING. Listens, cares, explains and then helps! I would 100% recommend them for any digestive issues! I feel so lucky to have her as a provider!!!"
"When in for an endoscopy. Maria my pre-proceedure nurse was absolutely fantastic(didnt even know/feel she started the IV). Brian( anesthetist) was very kind. Dr. Walker was outstanding, through and explained everything. Samantha (post-proceedure nurse) provided excellent care with outstanding professionalism. This team knows their stuff."
"I had gone to see Dr. Stein in 2013. While I didn't see him on my last visit, the gentleman who got all my information and the woman, who scheduled me for my January 2023 appointment were both wonderfully professional. They answered all my questions in a simple and easy-to-understand explanation. I'm definitely looking forward to seeing Dr. Stein in a week!"
"I have been a patient for over 8 years. Very professional and personal focused services. Ms. VanDam has provided very thorough explanations relating to my issues and also explains the results and options in detail. Highly recommended."
"Had a procedure done recently with Dr. Umar and "the staff"... I could'nt express how professionally everyone was and made me feel so comfortable during the whole process.. That facility is AWESOME!! I appreciate you all...."
"I think the staff and nurses are very friendly. I love Dr. Stein and his N. P. Shuana. They make me feel very special and concern about my needs and what issues I'm having with my health."
"Dr. George Walker is THE BEST! So IS Lindsay, his NP. Thorough, professional, kind and great listeners. Totally satisfied with this Group. Grateful!!!"
"I had an appointment with Shauna who was very professional and pleasant. She took her time with me making sure all my questions were answered thoroughly."
"I had digestive problems for 2 weeks with severe gas and pain from food poison. Met with Lindsay and she gave me famotisine after 4 days I got some relief."
"Lindsay Van Dam was amazing she took the time to review everything and explain the next steps that needed to take place in detail. I would definitely refer anyone to her."
"Dr. Stein is a professional who listens/advocates for his patients. I decided to schedule a visit with him after reading the positive reviews and I was not disappointed. On the day of my appointment, the receptionist was friendly and check in was simple. Maria, the medical assistant who brought me back to the exam room, was friendly, attentive, and professional. Dr. Stein walked into the exam room accompanied by an assistant who takes notes throughout the visit. This was great as it allowed Dr Stein to have a natural flow of conversation instead of having to continuously stop to take notes. I mentioned to Dr Stein some testing I had done and he was able to locate the results and share them with me during the visit. I left the visit with a plan in place and with the feeling that I was in competent hands."
"AZ Digestive is wonderful with caring staff. Lindsay especially took the time to listen to my concerns and set up the appropriate appointments. Very pleased with the care I have received thus far."
"I have always had great experiences at Arizona Digestive Health, the staff is nice and helpful. I had an appointment with Nancy, Dr. Zierer’s associate she handled my concerns and took the time to listen to what I had to say."
"Dr. Stein is a professional who listens/advocates for his patients. I decided to schedule a visit with him after reading the positive reviews and I was not disappointed. On the day of my appointment, the receptionist was friendly and check in was simple. Maria, the medical assistant who brought me back to the exam room, was friendly, attentive, and professional. Dr. Stein walked into the exam room accompanied by an assistant who takes notes throughout the visit. This was great as it allowed Dr Stein to have a natural flow of conversation instead of having to continuously stop to take notes. I mentioned to Dr Stein some testing I had done and he was able to locate the results and share them with me during the visit. I left the visit with a plan in place and with the feeling that I was in competent hands."
"Everyone at the office was terrific. The girl at the desk was friendly and helpful. Troy was a pleasure and very much able to put me at ease. Shauna was great as always. She seemed to ask all the right questions and had answers for my questions. All in all, it was a great experience. 👍"
"The team is absolutely amazing. I have serious anxiety when it comes to doctor visits, so much that I have not seen a doctor in over 10 years. However, Dr Stein and his team made me feel completely comfortable. I would definitely recommend to family and friends. :) To Dr. Stein and his team, thank you so much!"
"What a professional office from beginning to end. I was taken in a little early for my appointment. Was seen right away by both the MA and the provider. Received a phone call from the office within a day to set up my procedure and received all the prep information right away. This is my second visit with this office and couldn't be more pleased."
"We were treated with respect and professionalism. I'm so glad we went to ADH: East Valley we got answers and did not feel like we were just throwing one antibiotic after another."
"I am having swallowing plus lower stomach issues. These problems were addressed by the medical staff at AZ Digestive Health. I left there feeling much better going forward. I would highly recommend these people to anyone having Digestive Health problems."
"I can't say anything negative. From calling and scheduling my appointment, checking in for appointment, meeting with Dr. Walkers assistant and Dr Walker himself. It was a very pleasant experience. Highly recommend!"
"I have gone to this office for a little over a year. Dr Stein is wonderful and has an excellent way with patients. The staff for procedures are all top notch making sure you're taken care of well. I also saw the physician assistant Shauna Binette. She took great care of me and addressed all my concerns and helped me when I wasn't feeling well. Definitely recommend this office... Use the portal to communicate. It makes things go much smoother."
"Arizona Digestive Health East Valley has friendly and professional staff and doctors. I’ve been going there for a while and I’m grateful to find a good place that cares about my health."
"Love Dr Stien and Staff!!! Been going there for 10+ years now. My boyfriend liked him so much that he started going there too!!! Dr Stien listens to you and is very thorough. I would highly recommend him for anyone looking for a GI doctor."
"They are the best ! Dr. Walker and Dr. Collins have provide the very best care. I highly recommend them. I have recommended them to my family members. That says it all."
"I have recomended Dr Stein and his NP. Both are awesome. They take their time and answer all of your questions. I do have to say though that the front office needs to learn how to be more courteous with patients."
"The visit to Dr Vulcano's office, Digestive Disease Consultants, was a very good experience. He was pretty much on time and very professional. He performed an endoscopy at this office and it was quick and painless. I would recommend Dr Vulcano in a heartbeat!"
"Arizona Digestive Health is an outstanding health provider from Dr Ziere to his PA Shauna Binette. Front office staff So friendly and helpful! I was greatly impressed. Thank you Arizona Digestive Health for your excellent care!"
"Very friendly and interactive registration staff. The MA was professional and friendly in answering my questions. Shauna B, ANP provided very professional exam and great communication to understand my medical issue"
"I was really pleased at how everything turned out. The IV is my biggest fear, but my nurse was incredibly gentle and was able to get it in the first time! Only the tiniest bruise! The doctor and crew were funny and easy going. Everyone was wonderful!"
"Excellent care by Dr Collins during a critical GI bleed. His professional timely attention and follow-up with explanations in lay terms gave us encouragement & confidence that we were in good hands. Following appointment with his staff, especially Shauna, nurse practitioner, showed care above and beyond ordinary. She took a personal empathic interest, even to the point of arranging a change of appointment with another specialist, so we did not need to handle that. Wonderful caring competent team; we feel fortunate."
"The facility is a little small especially when it comes to clients that require assisting disability equipment ie:wheelchairs * (especially), walkers, electric wheelchairs/scooters.. The waiting area is way to small especially if you need to bring someone with to assist The staff are wonderful!!! however I experienced some problems receiving "timely" information/forms that needed to be filled out prior to procedures/appointments and there seemed to be some communication difficulties between providers, the facility is way to small for the volume of procedures being done!!! Other than that above mentioned it is a great crew to work with. Thank you for everything!!! Jennifer Klick"
"Dr. Ramsey Umar and his team are awesome! From checking in to his office for my appointment to checking into the surgical center for my procedure and discharge, everyone was polite and caring, thank you all. And Dr. Umar, patient, kind, responsive and competent! Yes, I am happy ❤️ Thank you all .... Bob G"
"I just want to thank EVERYONE, from my appointment to my procedure. Everyone there has been beyond amazing. As for my procedure, I was nervous. Everyone there was so nice and accommodating. I felt very comfortable and well taken care of. I was only sad to leave, lol... I wanted to sleep longer jk. I was glad to go home and that it wasn't as uncomfortable as I thought it would be due to the care that I had. THANK YOU TO EVERYONE! FROM THE BEGINNING TO WHEN I WENT HOME. Thank you Dr. Zierer"
"I have very complicated GI issues. In the hospital years ago, this nice Dr came in to check me.....that was it....I asked what group he was with and if they are accepting new patients. That was over 13 yrs.ago. Dr. George Walker is amazing, intelligent and sensitive while being professional. Great office staff on top of it!! I hope Dr. Walker NEVER RETIRES!!! Susie"
"Best experience in a digestive specialist’s office I’ve ever had. I was referred to Dr. Walker. He was very helpful. He listened and explained things very well. We had a lengthy exchange of info, just like an investigator would, in an effort to get to the bottom of my medical issues. Very well-spoken, dow to earth, knowledgeable and informative doctor. The front office staff were friendly and welcoming and most of the back office staff were just as lively. Not one person was short with me, impatient or dismissive of me. I’m grateful my primary doctor sent me here."
"My experience at East Valley Endoscopy was actually a fun and relaxing procedure. Thanks to all of the staff, Dr Zierer was so friendly, understanding and patient.They all took the time to explain everything about the procedure, even though I was nervous. I felt comfortable going in for the procedure and had no worries that I was well taken care of. Thank you to the whole staff for making my procedure fun, relaxing and worry-free. I will highly recommend you to my family and friends. See you in 10 years. Sincerely, Sonja Smith"