Patient Reviews

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.

5.0 Review from B.M. Source: Google Feb 25 2023

"Office has a nice atmosphere, helpful staff and Dr. Knightengale is always friendly and puts me at ease."

5.0 Review from J.S. Source: Google Jan 25 2023

"I have used Dr Nightengale For over 25 Years & I have always been very Satisfied in every way With Him. I Highly Recommend Dr . Nightengale"

5.0 Review from N.K. Source: Google Jul 25 2022

"The facility and all staff are attentive, thorough, caring and cordial. They make you feel comfortable in a speedy, quick process from start to finish."

5.0 Review from J.W. Source: Google Jul 25 2022

"Dr. Nightengale and his staff are wonderful! They truly care about their patients. I was impressed how Dr. Nightengale knew my background before I met him. That really meant so much because that told me he is thorough. I won't go to any other doctor."

5.0 Review from C.J. Source: Google May 25 2022

"If you have to have a colonoscopy this is the place to go, they are so nice. They make everything as comfortable as possible. They stay on schedule . Dr. Nightingale has a good bedside manner"

5.0 Review from J.B. Source: Google May 25 2022

"I first want to say the Dr Mark Nightingale he did what 80% doctors don't do he listened to the patient he said there on the bed next to me he'd listen to every word I said as long as I didn't take too long like saying the same thing over and over and then he examined me and if he was not touching the spots that did not pertain to what I was saying he allowed me to show him and I walked out of there with a completely different feeling I have been suffering for 6 years losing weight from 240 to 167 standing six six so skinny I'm about to blow away dying the first visit he said my life I appreciate him so much to the point if I saw him I would break down in front of him and shine his shoes he probably wouldn't let me lol but from what he did to me I know I will have 100% recovery after 6 years of brutal pain thank you Mr Nightingale can't wait till my next visit thank you very much Vincent l Jones"

5.0 Review from K.C. Source: Google May 25 2022

"Very pleasant , i was surprised to meet a doctor that seems like he really cared . i am kind of spooked with my condition but Dr Nightengale assured me that everything would be okay , those were the words i wanted too hear . Thank you Dt . Nightengale and see you soon"