Dr. Nightengale is absolutely one of God's greatest gifts to us all! Everything about him is off the scale, first class, top notch! Appreciate, respect and admire him endlessly! I tell EVERYONE about God's blessing of Dr. Nightengale!

Dr. Nightingale is very personable and highly knowledgeable in his field. His office is extremely well organized. You could not ask fir a better experience.

Dr Nightengale ordered lab extensive lab work & will follow up with results soon.

Have had Doctor Nightengale for a very long time and after my last doctor he is a gem.

Came off as fake. Tried to end appointment without even examining me first. Had to call in nurse to have him come back in and he barely examined me.

I was surprised at all of the negative comments that were posted. I have been a patient for over ten years and have had three different procedures done with good results. He was very informative and he is a wonderful doctor.

I highly recommend Dr. Nightengale

I am dumbfounded by how much time and money I wasted seeing him and how he didn't figure out a single thing after numerous rounds of testing. 2 of the test he ordered had nothing to do with my symptoms. He set up a CT scan for my stomach when it was supposed to be my colon (the doctor giving the test noticed that right away), and I don't even have stomach issues. Lactose test? I've been living off milk and cheese since I got sick because meat and vegetables go right through me. Dairy products actually help relieve some of my symptoms but he insisted I take the test and I told him no every time and then he went ahead and scheduled the test without my permission. I fired him by letting the office know I wasn't happy with him at all and I'd be going to another specialist and his office continued to schedule me for test and office visits for almost 3 months after that conversation. I had to threaten legal action against Tulsa Endoscopy Center before they stopped contacting me. In short, my experience with him was like a wild goose chase and a complete and total waste of time and money.

I thought I was sick till he started working on me. I got sicker after seeing him.

The doctor seems very knowledgable but staff is kind of rude. I was a little upset about not understanding a bill due to there are 2 different places that bill you and the billing lady started yelling at me. She said this is obvious because it is the same with all medical procedures. I told her I have had very few medical procedures and this is why. Dr. N could have told me more info about my problem but didn't unless I asked the specific questions. I didn't get the brochure explaining the procedure till after I had had 1 of 3. During the 2nd procedure he explained more than he did during the 1st which should have been the other way around. I was in quite a bit of pain after the 2nd one but no one asked before I left. Both times when staff called me the day after the procedure they did not ask how I was doing/feeling but only wanted to schedule the next procedure. Pretty rude, they could at least pretend to care. Also did not tell me how much my insurance was/wasn't going to pay until I was ready to go in for the 1st procedure. Luckily I had my husband there with his credit card! All this being said I would recommend him. He seems to know what he's doing and his nurses are nice. I guess it is just usual in the medical profession for the doctor to be very hurried and the staff to be pretty rude. Also when I asked for a morning appt they said he didn't do this procedure in the mornings but when it came to the day of the procedure they asked me to come in earlier due to cancellations. They required me to call back, even though all I could say was I had a sub lined up for the afternoon and couldn't change it. I wish doctors offices would consider their patients as customers and at least pretend to put them first.

I also can't believe the negative reviews. I have seen Dr. Nightengale for over 17 years and he has been nothing but caring, professional and always takes his time to make sure I'm comfortable on what he is doing. I highly recommend him. For those negative remarks, there's another side to their experience.

I was very nervous about seeing a doctor of this type but he was very nice and took care of my problem without any problem. Great job.

I felt like he knew what was wrrong and how to get the answer quickly. He made me feel much better.

I work in a local hospital and when i needed a stomch doctor i was surprised how many nurses and doctors recommended him. He was on time found my problem. very professional

I've been seeing Dr. Nightengale for over 12 years and I am so surprised at the reviews that are negative. I had and have always had extremely positive experiences with him. He actually was the third doctor I went to with a liver disease I finally got diagnosed with from him. He knew the exact diagnosis form my telling him my symptoms and my labs before he did one more test to prove it. He stayed in the room for as long as I needed him. He went over every detail with me and I have had two colonoscopies with him and no problems at all. I have two friends that went to him under my recommendation and love him. So I am really surprised that he is not like he is to me to others.I know part of his work was at Mayo Clinic with the doctors there and so I was happy to know that he had some excellent training in the liver department which I am going to him for. He told me to call him at the office and ask to speak to him if I needed to talk to him. the first time I did that, the staff was reluctant to let me talk to him but I told them what he had told me and I got to talk to him. so I am sad at these other reviews. I think he is fabulous.!!

He is so full of himself. He talked down to me and made me feel like every question I asked was stupid. He was rude to my daughter as well. We felt very uncomfortable and will not be going back.

Dr.Nightengale is very straight forward which I like. He is sure of his knowledge and careful to order tests that make sense for the situation. I am reading a lot of comments that he is rude. I disagree. He gives you the facts without false commentary. It is much better to know the truth than to hear what you want to hear or have the truth softened. The wait was too long this time--sometimes I am taken in right on time.

Staff was rude both on the phone and in the office. I was 5min. late to my appointment so they had me sign a document saying that I will not be late again when the doctor was an hour and a half late! I understand that it is important as a patient to be timely, but I expect a little of the same in return.I have never been treated so badly. It is impossible to get in touch with the doctor if you actually have a problem. The staff does not relay any messages, or if they do I have never received a call back from the doctor. He insists on scheduling an appointment which is a $50 dollar copay every time and once I actually manage to get into see him he spends about 2min. asking how I am feeling. Once I actually got in to see him after my 1hr. 30min. wait, he spent about 2min. with me simply asking me how I felt and then sent me back to the staff.

He does not care about the care and well being of his patients. He will give you a good story on teh first visit but after that he will not follow through. Example: refused to complete a 5 question form from my insurance company so I could fill my medication. Said he would have to hire 2-3 more people if he catered to insurance companies. I found another GI doctor and he could not believe this response. I had my meds in a day. 2nd example: I was not fully out when I had my colonoscopy and I told him it hurt however he contined with the exam because he was in a hurry and would not wait for the drugs to take hold. Very poor care, AVOID!!!