Dr. Yu as well as his staff and the staff at the Barranca Surgery Center were GREAT! Everyone was kind and compassionate, and I would absolutely recommend him. On the morning of the procedure, I had a reaction to the prep I was taking. I called his office at 5:45 a.m. and left a voice message...not knowing when he would get the message. However, he called me back within 12 minutes! read more

The absolute worst experience for my 74-year-old mother. The only thing this doctor knows how to do is a colonoscopy; nothing else. He mistreated my mothers colitis for 6 months and at the end, instead of finding a solution, which by the way is not complicated (as we were told by other specialists in second opinions), he told my mother that "I'm frustrated with you and can't help you anymore!" This is the worst thing any doctor can tell a patient. He could have saved my mother a whole lot of pain and distress had he told her six months ago that he does not know how to treat her condition, instead of tossing her to other doctors and put her on perpetual antibiotics. Beyond acceptable. He should not be practicing. read more

Don't waste your time. Find a doctor who actually cares, he is NOT it! He sees you as an insurance payout, not as a human being!

I didn't meet with dr. Yu, so I cannot confirm the bad reveiws here. I met with his nurse and she was very nice and helpful, and so was the office staff. read more

I just wanted to leave a review for Dr. Yu and his staff who serviced me on 11/30/23, he and his staff were great from the nurses to the anesthesiologist they made me feel so comfortable thank you, guys! Dr. Yu nice Gastroenterologist read more

I called Dr. Yu's office after being in the hospital today. I had many test and I called per the ER doctor to check with my GI and have him do a phone appointment. I received a call from his office with a message that I had a balance which I was unaware of so he had his office call me and tell me to find a new GI for my needs wow!! Well I have sent over 5 people there including my mother. Bye Dr. YU WE WILL ALL BE FINDING A NEW GI Dr. There are plenty of them no loss!! read more

I had met Dr. Yu for a consultation and I felt very comfortable with him and his staff immediately. On December 29, I had my colonoscopy in Irvine at Barranca Surgery Center. I was treated with care and compassion from the minute I walked thru the doors. I walked in at 8:30AM and walked out at 10:30 AM just as I was told during my initial visit with Dr. Yu. Dr. Yu was great! He met with me and my wife in the recovery room after surgery and informed us about the surgery. He answered our questions and made sure we well informed prior to leaving. I will be returning to Dr. Yu when I am ready for my next one. read more

I had a colonoscopy and endoscopy had issues following it but was not contacted for 1 week or given instructions how to reach him post procedure for an Emergency. I called several times leaving messages to his office which I googled. read more

These people are very unprofessional. Will not recommend to anyone who doesn't want to get dicked around. made appointment 2 months ago for endoscopy. they called me at 4pm day before the procedure and told me they didn't get insurance straightened out. they had 2 months to tell me that. and I even went to their office for pre-op appointment 2 weeks earlier. I had taken medications for endoscopy for nothing. Be aware of these people. I would give them 0 star if I can. read more

I was referred to Dr. Frank Yu by my PCP to have a Colonoscopy and Endoscopy done. However, after having read the few negative reviews on here, I was a bit nervous, but since he was PCP referred, I bit the bullet and proceeded to make my appointment. First of all, his clinic staff for my initial consultation went very well. His clinic staff were so nice, friendly, helpful. They helped me get all registered, get my medical history and personal details recorded, then Dr. Yu came in to see me. It was just a short consultation to introduce myself, get me filled in for the procedures, and mostly to any questions I had. To the negative reviews on Dr. Yu.....I will just say that he is not rude and he does care about his patients. Dr. Yu is a humble, no-nonsense, professional and he is very good at what he does. Just because he's not the outgoing and outspoken type, doesn't crack jokes, etc. just means that he is dedicated to looking out for your health and well-being, first and foremost. If you want a comedian, I'd recommend visiting a comedy club. That being said, I just completed my procedure just an hour ago....so I'm still a bit groggy from the sedative. I want to say that Dr. Yu's staff and nurses, where the procedure took place, were absolutely awesome! They were thorough, comforting, highly professional, and did exactly what they were supposed to do. I have had this procedure before, but when I was living overseas. My only concern today was that, like overseas, despite being under a sedative I knew exactly what was going on....when tubes were being stuck down my throat, etc. But here today, when I opened my eyes, I was thinking to myself, what the heck is wrong with this people?!?!? What is taking them so long to begin the procedure!....then my friend (who was to drive me home later) walked in and told me that they were done with the procedure 10-15 minutes ago! WHAT?!?!? I absolutely did not feel a thing....and had no idea whatsoever that the procedure was already over and done with!!! Dr. Yu came to see me shortly after I woke up to tell me what he'd found inside of me.....all good! Phew! And what service!.......this was the first time I'd ever sat in a wheelchair and pushed all the way down to my friend's car waiting at the front lobby entrance. I'd never received this kind of excellent service overseas. read more

Dr Yu was great ! Very detailed and knowledgeable. He was patient and took his time never making me feel rushed was never dismissive and answered all my questions thoroughly. He personally called me when my labs results came In. I would highly recommend him! As for his staff, they are great! Very helpful and professional! read more

Horrible front desk people. Whoever handling the phone can't communicate with people in polite and nice way. I never got a chance to even speak with someone because they just text you. Whoever chatted with me was the rudest service I even had in my life . I wouldn't trust doctor if his team already have problems read more

I was so happy with the staff at Dr.Yu's office. They were very responsive when I had questions about my colonoscopy prep. Dr. Yu is so friendly and he immediately puts the patient at ease. This is my 2nd colonoscopy performed by Dr. Yu and and I felt very comfortable. Highly recommend this practice read more

I have been going to Dr. Frank Yu for years. he has performed two procedures, so far. However, now he seems to be full of hidden costs so beware. I have an HMO and even contacted them about my upcoming procedure and was told that it was completely covered with Anthem Blue Cross HMO. Not so with Dr Yu. My first two procedures were covered completely by my insurance. However, just days before my third procedure, I received a text indicating there was an additional $100 charge. I called to inquire about the charge. I recieved a phone message that there were even more charges with the anesthesiologist and the doctor as well. I kept the message for reference so I have proof. I also left a message stating if I did not get it in writing that my insurance covered all costs, I would cancel the procedure. I spoke with Molly from the Barranca Surgery Center the following day and suddenly my insurance would cover everything but the $100 copay. I won't go on as it is a long story, but get it in writing there will not be any additional charges or else you may have a surprise. This rating does not reflect his good service. This is an ethical issue. Dr. Yu, be upfront with your patients. Explain all costs during consultation. Honesty is the best policy. read more

Dr. Yu has a very friendly mannerism about him. He talks to you in terms you understand. I'm a 45 ye old woman who doesn't want to think about colonoscopies, but they are very important as a preventative measure! My mother passed away young (49) with colon cancer. I've had 2 colonoscopies performed by Dr. Yu, both were painless; no issues after. His staff is very informative; will explain procedures and instructions to do beforehand very thoroughly. I highly recommend Dr. Yu for your gastro needs. read more

Terrible experience getting no help. I went here after months of struggling with pain building up the courage to finally seek help. He found out I was a game developer and spent most of the time asking me to make a game about colonoscopies instead of listening to my problems or telling me what my issues could be. He ordered a colonoscopy which was the worst experience of my life and gave me no information as to what my problem was. read more

An absolute sweetheart, thorough and explains things in ways that make them easy to understand.

Doctor Yu seems to be nice, however the office billing system was very out of date. Payment can be only made by mailing in a check or calling the office to pay by card. However, the phone line was down and call couldn't go through. I wish they could have easier way to save some stress. read more

Dr Yu is treating me w a hardcore liver medicine but after 4 tries they can not call in sublingual zofran (the office lady Ronnie never heard of this word sublingual she asked me to spell it) today I called at 6:30 am after getting sick, and dr Yu picked up! He was caught off guard & said he heard there is no side effects of nausea, that he ever heard of, on this medicine (it's listed as number 2 side effect on pamphlet) & that I should go see another doctor for my side effects. Like he did not believe me!!. Wow. I feel like he could care less about treating the side effects his medicine he prescribed are causing & it's just nauseous medicine - not controlled ....just don't bother him(?) . The one guy who is nice in this office is Chris so I will say thanks to him. update: one month later / i stuck w him even w no apology and today he terminated my treatment w him bc he saw my review and said i hurt his business. read more

My wife had her first colonoscopy performed by Dr. Yu and she felt very comfortable. We would strongly recommend to our family members and friends. read more

WARNING! DO NOT GO HERE Just like what other said: Frank Yu is literally the worst physician I have ever had. He doesn't even care about my problem (upper stomach pain), he ordered blood test and ultrasound for me (this was another disaster I don't wanna think about it again). In the end he just told me to lose some weight. The stomach pain came back a few times in the next few months so I decided to go to another doctor in Newport Beach later and she is way much better and professional than this guy. She arranged an EGD (upper endoscopy) for me right after the 1st office visit after knowing my symptoms. And it turns out that I do have gastritis and she also took some cold forceps biopsies for histology to see if this is caused by Helicobacter pylori. read more

I've had the most wonderful experience with Dr. Yu. He is genuinely attentive, caring. He listened and answered my questions and concerns. The procedure was thoroughly explained and went flawlessly. The wait time was short. His staff was efficient and patient. Could not ask for better attention. I have received a complete report with photos when the procedure was completed. It was extremely satisfactory. Highly recommend this practice to my friends. Thanks Dr. Yu! read more

My brother just had his first colonoscopy as a result of his cancer diagnosis. Dr. Fang Frank Yu and his staff were amazing. Dr. Yu was caring, listened to our concerns and was compassionate and explained everything that we would be expecting for the procedure. Dr. Yu's office staff is so professional and their phone and email responses are in a timely manner. I highly recommend Irvine Gastroenterology and Dr. Fang Frank Yu! read more

I was very impressed with Dr. Yu and his team! Kevin and Chris are friendly, pleasant, kind, and knowledgeable. Thank you very much for your professionalism and care! read more

This specialist is truly special. I really hate going to any doctor, let alone to be sedated and tubed for a colonoscopy! But I survived? First appointment for consult went well, his staff tries very hard to handle everything perfect. I showed up 2 hours early and was able to be worked into the schedule. Dr. Yu is on the quiet side and very brief, but he is highly knowledgable and skilled. The staff handles all instructions, appointing, and prescriptions. I was scheduled three days later and with high anxiety, drank the miralax and took the dulcolax as directed and showed up to my appointment at the surgery center. Just as impressive were the highly skilled staff there. I had got myself so upset, I was crying. They were all so sympathetic and the anesthetist assured me she would be there thru the whole thing, not to worry and they will all take good care of me! Very considerate, very respectful, practically held my hand the whole way. There are clocks all around so I could see the time. My scheduled time was 11:15 am, and when she asked if I was ready, it was 11:05 am, next thing I knew, I said I could feel sleepy. When I woke up, it was 11:20 am and I was looking at the post op nurse! She cheerfully said I was done and she called my ride! That was that, crying for nothing. Then dr. Yu came in with the photos and paperwork, said it went perfect, smiled and said I was wonderful. Impeccable clean place, all staff members are well groomed, very nice and pretty much nothing to worry about at all. And trust me, I did all my research! Thank goodness for such a great experience, I HIGHLY RECOMMEND this doctor! Best around! read more

Dr. Yu and his team are great! I went to see Dr Yu for a procedure because I had some pain. He and his staff were very supportive and attentive, they listened and discussed all my complaint in details, and I was scheduled for my procedure promptly. The procedure itself was so easy because of the high professionalism of Dr Yu and the surgical team. No pain, no complications, no discomfort. I felt safe and well taken care of. Thank you so very much! read more

in 4/15/2022 , I had a colonoscope done by doctor YU. He called me two days ago to instruct me to prepare this procedure and answer my questions. That day was Sunday. he had removed some polyps and explain something to me. Doctor Yu is very nice doctor and respectful and knowledgeable doctor. read more

I had a double procedure from Dr. Yu, an Upper Endoscopy and Colonoscopy, previous experiences with UE's had been pretty negative, but I have nothing but wonderful things to say about Dr. Yu. The recovery was super easy, I had zero discomfort the day after. Full results from the lab work and Biopsies were received within 72 hours of the procedure, including dozens of annotated photos. It couldn't have gone better, thank you Dr. Yu and your amazing assistants. read more

My mom recently had her colonoscopy by Dr Yu and his team. They are best! They were super nice and very helpful to my mom. She had a great experience there and would definitely recommend them to everyone. Thank you Dr. Yu and surgical team for taking care of my mom! read more

Dr. Yu performed Colonoscopy on me March 2019 and everything went so easy. I wanna thank him and the rest of the team especially the anesthesiologist as well for being very professional and very good at what they do. read more

I was sent to Dr. fang for a colonoscopy. Perfect location, front staff is excellent and my wait time was short. I love the fact that you are having everything done right there and don't have to be transported to another floor. The nurses were phenomenal, I don't remember a thing, which is probably great. Dr. fang met me both before and after the procedure explained results and gave me two hard copies of the results with pictures. Similar to what other folks said, in these reviews he's not a huge talker but he tells you what you need to know both before and after words. And he is very nice. I would highly recommend going to Dr. fang. And again his staff is wonderful. read more

Dr. Yu: You maybe a good doctor; but you need to learn some respect to the team that helps you! I was a driver of a patient this week and experienced the most unbelievable display of disrespect to people; I have ever seen. I would not wish this on anyone. You may have a MD behind your name but you need to go back to school for bedside manor. Shame on you for being so rude to staff and families of patients. read more

WARNING: Frank Yu is literally the worst physician I have ever had. Unprofessional, rude, careless, and even dangerous. I honestly don't understand some of the positive marks. You have been warned. Some facts below: After having a surgery, while I just opened my eyes and was still under the influence of anesthesia, he came into my recovery room (which was his obligation) and gave me a lot of info and directions. Asked me if I understood. I absent-mindedly replied "OK". Then he just walked out and disappeared. Afterwards, I don't even remember what he said at all (Honestly, who would?). But this is not all. In my very first visit, he was playing some media on an iPad located next to me. He told me (not ask me, he ordered me) to turn it off. I didn't think much of it and looked for its off switch for about 10 seconds. He was yelling at me "turn it off!" repeatedly. I was shocked, what's with this guy? I am a patient, not his house servant. But I didn't think much of it, and went on with the visit. Then, he asked me a series of questions regarding my condition, to which I answered plainly. At the end of the session, he drew a conclusion from imaginary data exactly opposite of what I just told him. This happened several times. With rudeness and uncaring attitude aside, his poor listening and data gathering ability is not just unprofessional, but dangerous. After my 2 visits, I called my primary care physician and and told her about my experience. My prim. doctor confessed that I am not the only one who has had a poor experience with Frank Yu--she has had multiple complaints. I will never visit this clinic again, and for your own good, I suggest you do the same. read more

in December of 2019 I had a colonoscope done by doctor YU. he was very respectful he sat down with me during the consult answered my questions and sunshine on many medications I was worried. after my scope he came to my room and I wasn't very coherent so all I heard was that he had removed some polyps and would be calling me. when he called me he was very informative he took time to answer my questions and to go over my concerns. I am now seeing him for my second colon scope however this time I have symptoms and I am very scared I am choosing him again because I had a good experience with them and he seemed to know what he was doing I am hoping that this goes well just as the last one did but this is going to require more attention because it's just not your basic scope it's to find out what's wrong with me and this time I had to have a CT scan which I've never had to have before cuz I've never had any problems with my intestines other than polyps so I'm leaving it positive review and I will update the review after my colon exam I'm sure that doctor Yu will be informative and patient with me and find the problem. if needed I am sure that he will refer me if I need another doctor and to someone that he has confidence in but they think doctor Yu who is experienced patient respectful and knowledgeable, will be able to find the problem / diagnosis. Dr. JD read more

I had my first colonoscopy about five years ago from Dr. Yu and he and his team were fantastic! I need to schedule another one now. Dr. Yu offers you the option to remain conscious for the procedure, which is what I chose. It was painless and really interesting to see your colon on a large monitor. I highly recommend Dr. Yu. read more

*I highly recommend Dr. Fang Frank Yu! * I am 51 years old and this is my 1st Colonoscopy. *I went to Dr. Yu for a Colonoscopy after I had interviewed 4 other Doctors. *This procedure was very stressful to me and had a lot of concerns. *Out of all the Doctors I felt the most comfortable with Dr. Yu and his staff. *His office is up to date and is all computerized. I was at several Doctor offices where they are still using the paper method! Writing notes on the front of manila file folders! *Dr Fang Frank Yu staff was efficient, professional, personable and had all the systems down. *When I asked for a copy of my records it was emailed to me within 2 hours. *Meeting Doctor Yu was very enjoyable. Nice bedside manners, good sense of humor, listens, took his time with me, had a large 3 dimensional chart so he could explain how the body works and what are all the pros and cons of the procedure. *After meeting with him, I spoke to the coordinator and she scheduled the surgery date and showed me in detail what I needed to do to prepare for surgery, where to go, time, what to wear, how to do the cleanse before surgery, etc... (It was also written in detail on paperwork that I could easily understand and follow). * Surgery Day: I woke up scared and apprehensive. * Arrived at the Surgical Center on time and the waiting room had a nice atmosphere and was very clean. * Everyone preparing me for the Colonoscopy was great, very professional, and explained what they were doing before they did it - I started to relax. * The atmosphere in the area was very friendly, cheerful with nice teamwork. * Loved the 2 hot blankets the nurse covered me with! *Dr. Yu met me one more time before the procedure and I felt very, calm and reassured. He definitely knows what he is doing! * He was very aware of everything going on and I could tell that he has high expectations of the people who are working with him. He wants everyone to have their systems and procedures performed to the highest degree of professionalism and accuracy. * All I asked was that I do not want to feel ANYTHING (I'm a baby when it comes to pain) and that is what happened! Even the IV was practically painless! * Last thing I remember before "going out" was looking at the monitor. * When I woke up I was looking into the most handsome face I have ever seen... my boyfriend! * I was given a 3 page report with pictures of my Colon and a diagram of where the picture was taken. The report was easy to read and very informative! * Since my operation, the surgical center has called me twice to make sure that all is well. * I highly recommend Dr Frank Fang Yu! read more

I'm 54 and this was my 1st colonoscopy. I was procrastinating this procedure for the past 3 years and finally decided it's better to find out now rather than later. Dr. Yu made the entire procedure very easy to understand and his staff was very professional. They explained the entire pre-colonscopy procedure about the clear liquid diet. The most uncomfortable part was AFTER drinking the Miralax solution. I liked mixing the Miralax solution with a white grape sparkling water rather than Gatorade. My procedure was schedule at 8:30am at the Specialty Surgery Center(very nice). The surgery center preparation process was great. Dr. Yu's nurse came in and wheeled me into the procedure room. I didn't remember the procedure which is the best part. Great sedative whatever it was. The last thing I remembered was saying hi to Dr. Yu as he came into the room and then I'm waking up in the recovery room with my wife sitting next to me. No soreness or pain or memory of the procedure. Upon checking out, I received a 3 page report with color pictures. A few hours later it was lunch at Ding Tai Fung. No need to delay your colonoscopy - all that apprehension for nothing. read more

I cannot say enough about this doctor and his staff. They got me in ASAP. They are also contacting the colorectal surgeon to try to get me in sooner got my surgery. Great and caring doctor. read more

Dr. Yu is awesome. He has been taking great care of my parents. All procedures went smoothly and stress-free. Easy to schedule and everything is explained so well that the patients actually understand what to expect. Office staff are friendly and extremely accommodating. I accompany my parents to every doctor appointment since they speak no English. So I know. And I'm a big fan of Dr. Yu. Highly recommend! read more

Dr Yu is a very professional, knowledgable, and most important of all honest Doctor. I had the same procedure done in the past with another Dr and Dr Yu made the same procedure infinitely easier. I highly Highly recommend him read more