His office repeatedly don't call back in a timely manner and make mistakes regarding basic…read moreinsurance and medication. I love him as a provider but his office is a miserable place.

Dr. Ismail is the best , absolutely, without a doubt. Unfortunately he relocated to Nevada several…read moreyears ago. Wish he would come back.

The office space is nicely oriented. However, the mixed my appointment t up leaving g me waiting…read moreseveral hours to see NP to schedule exam. I'm going to re-review them after procedures to give full review instead of focusing on the initial mistake. Drew

As soon as I walked out of there and appointment made, I regretted it and asked my provider to…read morerecommend another place. Didn't seem professionally managed and was rushed through the scheduling for the procedure. I just got negative vibes all around.

The name Gastrointestinal pretty much describes the type of Medical care. After one colonoscopy I…read moreneeded an immediate recall due the findings of first I was put off 4 wks JUST for an office consult. Not happy with that level of unconcern on their behalf, when I on the other hand with my imagination all over the map beyond miserable waiting. During that time my home sold and I'm moving back to my home state. I kept the follow up appointment but I will continue my care elsewhere. Dr Klein is a sweet caring Physician. I highly recommend him. His staff, depending who you get answering the phone will or can be helpful. Often you're sent to a VM or not answering at all. That happened to me several times. Again I liked Klein a lot.

Absolutely unacceptable billing practices…read more I was overcharged for a preventive screening -- something that is 100% covered by insurance. Not "maybe covered." Not "partially covered." Fully covered. And instead of automatically correcting the overpayment once insurance processed the claim, this office just... keeps the money unless you call and demand it back. Let that sink in. They will not issue refunds automatically. The patient has to catch the mistake and call. How many patients never even realize they were overcharged? How many people assume the office knows what it's doing and trust the bill? This office handles insurance claims every single day. They know how preventive services are billed. They know preventive screenings are covered at 100%. Pretending confusion or acting like this is some unpredictable insurance mystery is insulting. This isn't a rare coding anomaly -- it's routine, standard billing. Patients shouldn't have to audit their own medical bills to make sure a provider isn't sitting on their money. If you overcharge, you fix it. Automatically. Period. If you go here, scrutinize every single bill and compare it to your EOB. Apparently, that's the only way to make sure you're not quietly overpaying.

After reading Yelp reviews I suspected they do not do colonoscopy procedures by any practitioner…read morehere. That is important for us to know now , as my wife is due By the years rule. 10. So I will keep looking.

Website lists all types of gastro related care and procedures. When you call the message says they…read moreonly treat fatty liver disease.

Everyone is caring and willing to help and answer any questions. The type of care from the GI…read morespecialists is top tier!

Made a pre-procedure appointment and when I arrived I was told the nurse I was supposed to see…read morewasn't in. "Oh we tried to call you" - um NO, no one called me or left a message. There are better offices with much better customer care in Tucson. Please pick another one, I am sue you will get better care elsewhere!

Probably the worst doctor visit of my life. I am a younger female, no past G.I. issue, don't smoke,…read moreand he completely dismissed my concerns. He printed me over 50 pages of scientific literature and said it should go away. Luckily English is my first language and I have a science background (I don't mention the second part ever). Well guess what, I went to another G.I. got some blood tests, CT scan, and it was something bigger. If you want someone who will miss something, go to this doc. If you want someone who will listen to you, advocate for you, go to any other doctor. I only took this appointment because it was the first one available, I'd recommend anyone to wait for another doctor, even if it's another one in the same clinic. This was the first doctor that I actually left in tears. Do not waste your time.

Dr. Shekleton performed an endoscopy on me and identified my problem. He prescribed the proper…read moremedicine for and explained the results of my test. I feel great now and I owe it all to him.

I was there recently there for an endoscopy and colonoscopy. Dr. McCallum and all the nursing staff…read morewere five stars fine, and I received the compassionate care that I needed. The office staff communicated well. The person at the front desk, Megan (?) probably should be in another position. She sounds and acts like a robot. However, in short, it's exceedingly clear that the joint practices of Drs. McCallum, McNerney and Hanna have LONG ago outgrown the facility. The parking lot is too tight and stretched to the limit. On the day of a procedure, whether the patient or driver, this adds up to additional stress. The larger waiting room needs better lighting and some freshening up in the area of esthetics. The smaller surgery waiting room, to the east, is an abomination! The day that I was there, it was pretty chilly outside. The patient exit door opens frequently, and it got cold and drafty. So, there we are, faithful spouses, drivers and patients--people who may not have eaten in more than 24 hours and slept little--sitting in this ugly, cold an cramped waiting area. There aren't enough seats and there isn't enough room for comfort. The patient exit door should be in the back of the building with a dedicated door for such and a safe place where their drivers can park. As the throughput of the facility is high, I have to say that I felt rushed as I was coming out of anesthesia. Rushed, in that beds are in very short supply. "Wake up and get out of here!" So, to the owners of the business, I say, take some of your retained earnings, and invest in a better property and plant whereby your patients can receive the first class treatment that they deserve and that you want them to have.

This place runs like a well oiled machine. As you walk into the front door, a receptionist helps…read morewith check in. A few minutes later, an assistant takes you back, a quick change of clothes and it was it's time to lie down. The staff are very friendly and polite. They place you at ease through conversation and they appear to enjoy working together. The excellent communication helps relieve stress and anxiety. A short nap and it's recovery time. Easy, fast and efficient. Dr Hanna is knowledgeable, experienced and trustworthy.

Dr Mezher and his staff were the utmost professionals and treated me extremely well. My procedure…read morewent very well and I recommend them highly for any need for gastroenterology professionals. The pre/post op nurses Rachel and Sarah were unbelievable as well. They were extremely caring and are extremely knowledgeable and competent.

Had a colonoscopy on 3/2/23 at the Sierra Vista location. Went off without a hitch. Great medical…read morestaff and office staff. Procedure was very thorough and was right on time. I highly recommend them.

Good gone. He really screwed my up. I had to spend a week in the hospital at N. W. It was total…read moretorture. Why? He say he didn't know why he cut my colon, after doing so many a day? I am still not the same. There isn't anyone at Az. Gas I would trust, the time lace is like a factory, for them to make money.

Coming back to Tucson to Dr Tsai - He is the best Gastroenterologist and has done multiple…read moreColonoscopies and EGD's on me and wife. After procedure, he hands you completed, color report with picture walking out the door and very smart. Don't want to see or start with anyone else, so travelling over 1,000 miles to see him again.