Patient Reviews
Patient Feedback
We understand that finding a provider that will truly listen to your concerns isn’t always easy. At Adult Gastroenterology Associates, our patients are our top priority. We strive to create a thoughtful and compassionate environment where you can trust that your care is customized to your needs. Take some time to browse through our reviews below, so you can read first-hand about the dedication and care that our specialists provide patients in the Tulsa, OK community.
"Dr Stanton wS very professional with my sister Brenda Martin, explained everything to her so she could understand, we would recommend him"
"Thumbs up 👍"
"I was a few minutes late but did not get stuck in the waiting room forever, I was in a room waiting after going back for a while longer BUT they had a touch screen full of simple but helpful knowledge about your gastrointestinal insides so the wait was useful. Everyone was well mannered and I feel like I'll get results from going here before too long!"
"Dr. Blankenship is very attentive and kind. He works to find remedies for my health issues. I would highly recommend him."
"Dr Conkling has always been professional and also caring. I feel like he understands me and really understands my concerns. Dr Conkling has helped me thru some tough times when I was diagnosed with hepatitis C, he got me on a medication that helped cure the disease and is following up with other side affects. I will always be thankful to him! I will refer Dr Conkling to all my friends and relatives!"
"Professional, caring, personable, thorough, cutting edge knowledgeable, all describe Dr. Conkling. So happy I found him several years ago and his staff at AGA, Tulsa, OK!"
"Dr McNamara is a wonderful Dr, he is very trustworthy, and tells u what’s up with u,he is very kind, his partner Maryann was amazing also I miss her, she went back to the emergency room to work."
"Dr. Blankenship discussed options and treatments for diverticulitis flare ups and gave statistical information to help us makes a best decision for me! He is a great communicator!"
"This may duplicate what I already did, yesterday, as a Google Guide. Safe to say Jonathan Bouldin has the credentials, history, and gurney-side manner to deliver services as good as he says."
"Dr. Conckling is an Absolutely Awesome Doctor. I would Highly Recommend him and his Staff. His bedside manner is so genuine that's hard to come by! They are all wonderful and once again I would highly recommend Dr. Conkling ❤️ I would also like to say that Dr conkling is the kindest most genuine caring will sit with you and talk to you as long as needed for you to understand I am grateful to this practice and most of all Dr Conklin"
"Everything went very well. No issues whatsoever. Friendly efficient staff. I was in and gone before I knew it. It was perfect."
"So far my experience has been great. I loved the nurse and the Phlebotomist. They were both good at making me feel comfy :) haven’t seen the actual doctor yet but when I do I will update."
"This was my initial (consultation) with Dr. Blonsky. He was very thorough with his assessment and information, was not in a hurry to leave the exam room. I appreciated his patience and bedside manner. His nurse was very nice."
"It was a good pleasant visit from the minute I walked in. The Dr and nurses were very nice."
"Dr. Volak is a great doctor. I Have used him for years. Personable and easy to talk to."
"I want to thank Dr. Brandon Conkling. I highly recommend him to anyone looking for a skilled and compassionate doctor. He has been my GI doctor for several years and has always been very thorough and provided excellent care. He went above and beyond in helping me find a surgeon to perform a complicated surgery I was in need of. He's compassionate and very much a professional."
"My primary care Dr. believed that I could be anemic, so she had me go to Dr. Conkling. I had gone through the normal upper & lower GI test, but didn't find the cause of my issue. So Dr. Conkling ordered wanted to make sure that the issue was not in my small intestines, which involves swallowing a small camera. For what ever reason the camera got stuck in my intestines about 3 hrs into an 8 hr test. That was very concerning to Dr. Conkling and he quickly ordered another batch of tests to make sure the camera wasn't stuck in my system (of which I was sure I had passed it). My primary care Dr. & Dr. Conkling finally thought that maybe the care malfunctioned and had me swallow another 1. Interestingly, it to got stuck after hour 3 of the 8 hour test. This to, did not reveal why I had anemia. To end this long story, what I appreciate about Dr. Conkling is that he is not willing to give up. He is still looking for ways to find out what is causing this anemia."
"Great DR"
"Awesome staff and they are very understanding to all your needs. God Bless them and services."
"Got me in right away scheduled to find out whats going on with me fast than the other GI Doctors I've been to he has fixed my son's issues also"
"Kind, caring an great bedside manner! He treated me like a person an not just another file that came across his desk! Thank you Dr. Blankenship"
"(Translated by Google) very kind everyone (Original) Muy amables todos"
"I highly recommend Dr. Patel he pretty much saved my life. His Staff is always so nice also."
"Pleasing personality and concerned about your health"
"Great Doctor, good bed side manner, cares for his patients, excellent customer service."
"I was given a $2500 prescription for free. Thank you very much Dr. McNamera!"
"Dr Stanton is very friendly and professional!"
"One of the best doctors you can find! We highly recommend him. Doctor McNamara!"
"Excellent, Highly recommended.!"
"Very informative, very personable"
"Excellent doctor who really cares"
"My entire experience, having two procedures at Tulsa Endoscopy Center was beyond excellent. Dr. Clark and his staff are a class act."
"Dr. Conkling and his nurse are very considerate and have helped me feel comfortable and completely at ease through this whole ordeal. They have been informative and compassionate in every aspect of this experience and I am so glad that I chose Dr. Conkling for my doctor."
"Dr Conkling found a large advanced polyp in my intestines that nobody else had found. He said it would have been colon cancer in 3 years. He saved my life. Dr Conkling is the best in my opinion."
"I would recommend Dr. Conkling he seems to really care about his patients. He is very thorough and patient."
"They listen you feel like they care"
"They have scheduling down to a fine art. Very smooth procedure."
"Kindness, courtesy and attention to all my immediate needs. Thank you for caring."
"Very caring"
"Very personable, professional and helpful."
"Everybody is very nice and everybody is very experienced and knowledgeable"
"I have been a patient of Dr. Conkling for many years. He is a very knowledgeable and caring doctor. When you see him, he is always focused on you and nothing else. I would recommend him to anyone who needs his medical services. I can only say this about a handful of doctor's."
"Very direct to the point! No hassle, just true honest opinion. Well trained staff. Like them alot."
"I love this place Dr's are wonderful as well as the staff."
"Dr Nightengale is a great doctor and truly cares about you."
"Took my mom in to see Dr. Kliewer and from the beginning, we received comforting care. His front desk staff was friendly and accommodating. Once we got back to the examining room, a translator was afforded to us and Dr. Kliewer came in and he was friendly, informative, but most important patient and kind with my mother. I truly appreciate Dr. Kliewer, his staff and the work they do. Thank you."
"Dr. Kliewer has been my doctor for many years. He is knoweledgeable, competent, kind, patient and truly cares about his patients health. I highly recommend him."
"Well run practice, Dr. McNamara is compassionate and stays up with the science. Has helped me control IBS and diverticulosis."
"Excellent staff and facilities. Appointments are on time and nurses and Dr. McNamara are courteous and professional."
"Highly recommend was very scared of the unknown going in and Dr McNamara developed a plan for me and eased my worries."
"Very friendly people and they do their best to help and get things done in a timely matter!"
"(Translated by Google) Excellent!!! (Original) Excelent!!!"
"Very professional and listens well."
"Extremely wonderful"
"Very nice and clean. Prompt. Didn’t have to wait. Staff was very friendly. Doctor was very thorough and explained next procedure."
"Adult Gastrology and Dr Stanton's team and his nurse are very professional very caring and very very compassionate I would recommend adult Gastrology to anybody I know you guys are very professional and loving and I thank you for everything you do I need you all and I hope you all have a wonderful Christmas thank you for everything you do"
"Very professional doctor and staff is excellent. Would definitely refer Dr. Markham Nightengale and will continue to use his services."
"Dr. Nightingale is friendly and thorough. His staff are friendly, kind and very efficient. Couldn't ask for a better gastro facility."
"Dr Volak listened to my issues and concerns and took the time to provide me with answers to my medical problems. He was friendly while being respectful of me and made me comfortable during my visit."
"Dr. Douglas Kliewer is amazing, He made a stressful time a cake walk. He was kind,understanding and knowledgeable"
"They all was excellent with their patients and did an amazing job with me, got me in there did my procedure and took excellent care of me, and I would highly recommend him for everyone. And yes I would definitely go back."
"Dr, stanton and the staff are outstanding."
"The entire office from check-in to the nurses are all very professional and most importantly freindly. Dr Clark is a great guy and wonderful doctor. He never has seemed rushed and is attentive and easy to talk to. Highly recommended"
"Dr Clark is very caring and answers all your questions."
"He seemed genuinely concerned and ready to get things resolved"
"Great experience was able to get in quickly for an urgent consultation"
"Several years ago I met him under duress with something stuck in my throat he performed the EGD with no trouble since. Has also done a colonoscopy in the past. He's a professional I will continue to be under his care."
"This was the first time o had been seen by this group and everyone seemed bey nice so I must say so far I am a little comfortable"
"Dr. Nightengale has been my gastroenterologist for over 20 years. In my opinion he is as knowledgeable in his field as any person could be. He is very efficient in his consultations with you. No questions left unanswered. I have had multiple EGD’s as well as colonoscopies and his review of the results is always very thorough. I highly recommend Dr. Nightengale."
"Polite staff great doctor who looked at all my records before meeting with me great doctor"
"Great experience with the staff and Dr. Blankenship, he has been my Doctor and my family's doctor for many years and I would not go to another Gastroenterologist around. He and his staff have great beside manners and take the time to listen to you, and you never feel rushed."
"Verrry good"
"Matt is very personable as well as being very professional and knowledgeable in his field."
"Dr Stanton was excellent in making you feel comfortable and understanding the procedure. Developed a good patient/Doctor relationship."
"Dr. Stanton is a very kind person and a wonderful physican who I have had the pleasure to call my dr. He helped me through a really hard time when I was previously told to go to Baylor and get on the transplant list. I wasn't ready for that and started looking for another opinion. My husband made some calls and we chose Dr. Stanton for that 2nd opinion. He has been my dr ever since without the transplant and I am doing really. That was a very good move on our part and I thank God for Dr. Stanton moving to Tulsa!"
"Very attentive of my life issues. Not rushed for time. Really cared about my health. Thanks"
"Very thorough, always listens and is looking for details often overlooked. Dr. Clark is the go to for any GI issue."
"Dr Conkling listens to my issues and took the time to explained several options for treatment in a way I could understand."
"The doctor was very thorough and provided me with a piece of mind, after taking the time and going over everything little detail. Happy to have him a my doctor."
"He really took the time to talk with me about my problems and offered several solutions while we wait for my medical records to be released. Very understanding and compassionate. Not an In and Out kind of doctor. I am looking forward to our next visit!"
"He didn't hesitate to help me with the situation I'm going through I highly recommend Dr Patel"
"Dr. Stanton is very knowledgeable and compassionate."
"Dr.Kliewer Was kind and understanding as I get emotional when I talk about my problems."
"Very pleased with him"
"I had a great appointment with Dr. Volak. Very easy to talk to. Answered all of my questions. Very knowledgeable and professional."
"Dr. Volak made me feel comfortable in discussing my issues. His confidence made me feel at ease. Would recommend his services to everyone."
"I have a friend who referred me to Dr Kliewer. It was my first visit, and he was very kind and attentive to my concerns for the visit."
"Wow! Such a nice guy with a real heart to inform and support his patients. Highly recommend!"
"It was a very helpful visit by Dr & staff. We’re hoping it will put us on journey to whoever the Lord intends us to be. Thanks"
"Great place friendly people answer all my questions"
"I absolutely loved my experience at my appointment!!! Dr Bouldin was awesome & helped me feel comfortable with my upcoming procedure."
"The care i get from AGA is always top notch. In person and virtual appts. are professional and all of my questions and concerns are thoughtfully answered."
"Dr Blondski is very good at what he does. I like him so far only had one appointment."
"Extremely thorough, wants to find the issue causing the problem. Thank You!"
"Dr. Stanton actually sat and listened to me. Then examined me, ordered scopes. Great bedside manner."
"Excellent, kind, friendly people always!!!"
"I enjoyed my appointment. Nurses were very kind. Environment was clean and friendly."
"Dr Blankenship is very professional and took the time to answer questions. His staff very friendly and helpful also"
"Ease of getting an appointment was fantastic. Nurses were kind and friendly. Dr Blankenship was awesome...he patiently listened to my cocerns and addressed all issues. Highly recommend."
"I have been Dr Conklin’s patient for years and so has my family. I highly recommend him. He is more than just a great doctor he Is good friend and takes a real interest in you. He takes time to listen and answer all your questions. He is a good man!"
"They know what they are doing I received excellent care"
"Very nice and personable, well organized, educated and very knowledgeable in his field."
"Dr Stanton was very professional, honest in what was expected."
"Very nice, seemed genuinely concerned and took his time. I didn't feel like I was being rushed or just a number."
"Dr Kliewer and support team was so kind and helpful throughout the complete visit."
"Very professional and very little or no wait. I recommend Dr Volak to anyone needing a GI specialist."
"DR. Volak is a very friendly and caring man, the saff was professional and friendly too. DR. Volak new right away what I needed to relieve me of my discomfort, I wouldn't go to anyone else."
"Dr. Volak is an outstanding Physician. He has a great personality and immediately puts me at ease. Dr. Volak spends time listening and takes my concerns seriously. Both of us are involved in my health plan. I highly recommend Dr. Volak!"
"Tulsa Endoscopy Center was a pleasant experience. From the front desk, the preoperative, the procedure room and the recovery department. Dr. Clark is a caring and informational Physician! I wouldn't recommend any other group of Physicians with this group or facility to take care of my well-being!"
"Dr. Conkling is a very thorough doctor. He spends time talking and answering questions that I may have. He’s very knowledgeable in the field of gastroenterology. I feel confident putting my health care in the hands of Dr. Conkling."
"Very professional and kind .This is your guy"
"Above and beyond, goes that extra mile to insure his patients well-being. Down to earth explainations of procedure . Definitely will send family, friends and colleagues his way !!!"
"Dr Clark and his staff were so professional. I’m not sure I’ve ever been to a medical procedure where all the staff is so friendly. Great folks."
"Dr Clark, his colleagues and staff were very professional and kind. Each one made sure I understood what was about to happen. It was a quick procedure and I was able to (mostly, bc a driver is required) resume my day. I had a question the following day and a nurse called and answered that question."
"I was very pleased with Dr.Clark. I felt like he really listened, took time to answer any questions. It took awhile to get a appointment but it was worth the wait."
"A good experience. Stacy was very helpful and pleasant when greeting me at her window. She explained how to fill out the info required. The nurse was extremely nice with her questions and taking blood pressure. Dr. McNamara was bery thorough talking about my problem and the procedure he would preform. No complaints at all about my visit other tham the length if time when the procedure would be done... 2 days before Christmas! However, part of that was my fault as I preferred to habe it done in my home town rather than Tulsa."
"He was a gentleman and shook my hand like he cared about me and my well being. He has truly helped me find solutions on my issues with my stomach. He was very respectful. I will always keep him as my GI doctor."
"Pleasent demeanor and professionalism, with a sense of humor to boot. His staff were super helpful with making sure I had all my questions answered."
"Dr Blonsky and the Staff at AGA are by far the best of the best for addressing all of your Gastro needs. They are competent, confident, and compassionate. Being teamed up with Tulsa endoscopy you couldn’t be in better hands. I’ve had gastric problems for over 20 years and Dr Blonsky was my Dr for a short time and because of an insurance change I lost him as my specialist. I was not only devastated but received inadequate care elsewhere. Trust me because I have been through multiple procedures and have a very complex gastrointestinal history so I do know most all of the specialists in Tulsa and I can say with confidence all the best work at AGA. If you have experienced an issue in the past or in the future with them address it with them. Most times it’s just a miscommunication and I know they will do everything to rectify whatever the issue is."
"I went in for my colonoscopy and was greeted by a friendly staff right from the beginning. My procedure was flawless. I didn't notice any issues whatsoever, woke up to a friendly voice and on my way I was! Highly recommended Dr Blankenship and his great staff!"
"Easy to talk to, listens to what I’m saying, schedules tests and followups to find the problem. Highly recommend"
"They were very helpful. Very kind."
"Dr Conkling addressed every question I had without making me feel like he was in a hurry to get to his next patient. He has a very caring attitude toward his patients and does not pressure them into anything"
"NP - Jonathan, was an amazing patient advocate. Having a long medical history, trying to find answers for so long, he made me feel heard and understood. He was very thorough and empathetic. I will recommend him to everyone!"
"Preformed procedure in a timely manner with professionalism and expertise."
"My first visit was amazing he was personable and caring an excellent physician"
"I would recommend Dr. Blankenship, he is kind & very professional, he took the time to answer all my questions and cares about my well being. His staff is amazing."
"Amazing doctor I felt heard."
"He spends whatever time I feel I need to discuss any problems I am experiencing or questions I may have about my treatment. I try to respect his time and do not feel rushed."
"Doctor Blankenship is one of the best doctors I have been to. He doesn’t bring a laptop in the room. He listen to you. Very pleased with Dr Matt Blankenship."
"Dr Patel is great! Very friendly, direct and to the point!"
"Professional staff and Dr. I would highly recommend"
"I highly recommend Dr Conkling without hesitation. Highly considerate and very thorough, all my questions and concerns were answered freely with the utmost respect. He went the extra mile. ⭐️ ⭐️ ⭐️ ⭐️ ⭐️"
"Dr. Clark is an excellent doctor. I am blessed that he is my doctor."
"He put in a g-tube and after I was able to eat again he removed it. I like him! He is honest and has a good bed side manner. I like his staff too they are all so nice. Great experience over all. No one wants to have surgery. I am so glad that he was my Doctor. I would most definitely use him again and recommend him highly."
"Dr. Conkling is an amazing doctor. He’s always gone way above and beyond for my husband. He’s extremely thorough and caring. I would highly recommend him to anyone!"
"The thing that stands out to me the most about Dr. Conkling is that he does not ever appear to be in a hurry to conclude the consultation and get to the next patient."
"Dr Conkling and his staff are amazing. He takes his time to truly have an understanding of what is going on. He even personally calls to check up on you. Great doctor!"
"Highly recommend. Very professional and personable. He is patient and kind. Staff is great."
"From the moment I walked inside the waiting area everyone was cordial and more than willing to help me. The wait wasn’t long before I went into the exam room. Dr Blonsky saw to my needs and conducted himself not only as a professional but also took a keen interest in my questions, answering them intelligently and fully. I highly recommend Dr Blonsky."
"Everyone staff member in this office is friendly and professional! Everyone works together to make this uncomfortable situation a little more bearable! This will be the doctor I use anytime I need a gastro doctor!"
"Very kind, detailed and great bedside manner"
"Dr. Volak is the best ! He is every understanding and listens to all your concerns.He answered all of my questions in great detail. He was not rushed but rather took time to make sure I was at ease about my upcoming procedures. Some visits are very serious and can be quite frightening. It’s great to have a doctor as caring as doctor Volak in your corner. I highly recommend and his team."
"25 yrs ago I went to 3 different Gastro Dr’s who tried meds that never resolved my problem. After 1st trip to Dr. Volak, I’ve never had this embarrassing problem again. Also have sent 5 friends with similar problems & all just love him for his thoughtfulness plus within a wk. no problem. He’s an exceptional Dr."
"Dr Volak was so caring. He knew what was wrong and fixed it. I am able to eat again and not worry about it daily. I will always recommend Dr Volak to anyone having gastro issues."
"Dr Volak is extremely patient and deliberate with his explanations and I felt complete confidence in him. Highly recommend"
"Dr. Volak carefully listened to my teen’s concerns and asked thorough questions to better understand the issue. He explained things to us rather well, even drawing some pictures to explain things. Medication was also not his immediate solution , which is deeply appreciated, especially when there are alternatives in this case that may actually address the root of the problem. I hope he trains medical students!"
"Great experience. Listen to my issues and very receptive. Definitely would recommend."
"Wonderful thanks"
"Great experience. My only concern is having to wait to have testing done for up to 3 months after a positive cologuard test."
"Love Dr. C. Very caring."
"The entire staff here is amazing. They truly care about their patients and making sure they can live their best life. Dr McNamara is a literal answer to prayers."
"I recently had my first visit with Dr. Stanton and it was excellent. He immediately made me feel very comfortable and it felt as he had been my doctor for years. I highly recommend becoming his patient."
"My experience at doctor Blankenships was a good one he spoke to me so I could under stand what he was saying and going to do for me"
"Dr Blankenship was very kind and seemed concerned and listened to me. He didn’t rush me out the door! I would highly recommend him to anyone! Twyla"
"My experience with Dr. Blankenship and his staff was wonderful. Dr. Blankenship.os a great listener and shows genuine concern for his patience."
"Excellent care, staff, location, and procedures. Thank you"
"Very professional and easy to talk to. Explained things and answers questions. Nice office staff and quick appointments"
"Pleasant and efficient."
"Dr McNamara was very professional and knowledgeable. He seemed concerned and confident to find any issues to provide the best solution for me to regain a healthy lifestyle."
"He’s Been my doctor for over 20 years. He’s great!"
"Doctor talked with me before and after the procedure. Seemed to really care about me being relaxed and ok. Would highly recommend Dr. Nightingale."
"I was pleased with the services that I received from Dr. Nightengale and staff for my colonoscopy/endoscopy procedure."
"Dr Conkling diagnosed a not so common type of colitis and was later confirmed by a biopsy. He listens to your concerns and discusses different options of treatment. I highly recommend Dr Conkling for any upper or lower GI issues."
"Dr. Conkling is an amazing doctor. He is kind, caring and very competent."
"Dr Conkling always takes the time to listen to my concerns and has taken the role of therapist more than once! I never feel rushed and he always puts my mind at ease. One of the best doctors I have ever had!"
"Dr. Conklin is a great doctor. I would recommend him, for sure!"
"Dr Clark and his team provided outstanding care. 5 star experience!"
"Dr. Clark was very kind. He explained what to expect and then met with me afterwards to explain results."
"I was very please with my experience at Tulsa Endoscopy Center with Dr. Clark, office staff and nurses. Dr. Clark took the time to explain everything of the procedure and the risk. He was very pleasant. The nurses and anesthesiologist were professional and very kind and pleasant as well. If you are looking for a Dr. and staff of professionalism and personable , this is the place."
"Very professional and friendly personnel."
"Dr. Kliewer has been my mothers doctor for years. He is always pleasant, caring and thorough."
"None better than Dr. Stanton. Dr. Stanton truly cares about his patients. He’s also an essential part of my cancer team. He diagnosed my esophageal cancer in May, 2020. His early diagnoses really helped get the treatment started quickly. Not only is Dr Stanton a great gastro doc, he’s also a good man."
"Dr Stanton has provided gastro services for me for many years and I am totally satisfied with the treatment he has provided. It’s obvious that he is one of the best gastroenterologists in Tulsa and surrounding areas. Great bedside manners."
"Everyone in the office was extremely helpful, kind and professional...The Dr made the experience bearable..."
"Dr. Patrick Volak is a great doctor. Could not find a better doctor. I appreciate his care very much."
"Dr. Volak and his office were very professional and knowledgeable."
"Dr Clark has always been comfortable to talk with, easy to understand and put me at ease regarding my procedure and diagnosis. I would highly recommend him!"
"(Translated by Google) My experience was very good l9s I recommend and they answered all my questions (Original) Mi experiencia fue muy buena l9s recomiendo y contestaron todas mis preguntas"
"Although I was not excited about needing the procedure. My experience with the doctor and facility was excellent. They made me feel at ease throughout the entire process"
"The doc came in and we talked about what I would be going through prior to during and after the operation. He provide excellent info and left me feeling I was in excellent hands."
"Dr Blonsky took excellent care of my cousin. His father died of colon cancer and Dr Blonsky is making sure this does not happen to him. Our family has been on his patient list for years. We trust him and you can too. Excellent doctor."
"Dr Clark, his PA and the nurses and receptionist are all very nice and helpful"
"I feel Dr. Stanton and his staff are outstanding. The have the qualities you want in medical professional staff. They actively listened to my needs, asked in depth question and carefully shared the steps I need to take. Dr. Stanford not only had these characteristics but also new my history, took time to get to know me and my concerns and carefully explained my options. I would recommend them! Dr. Diane Dross"
"Great Doctor! He took time to listen and to explain my health plan. I would for sure recommend him!"
"Dr. Volak is an amazing person and a Doctor. He really cares about his patients I have been seeing for about ten years now. He not only care about why I am there to see him but he also asks me about other things that are going on in my life too."
"Doctor Patel seemed concerned about my health. He made me feel comfortable"
"Very nice and kind"
"Dr. Patel is a very knowledgeable doctor. He has a very caring bedside manner. His staff was very helpful and caring. Made a very difficult situation bearable for my spouse."