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Ernest F Ribera, MD

4.3 (28 reviews)
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Updated 1 month ago

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He was great. The office was quick with responses and he was wonderful to work with. I would recommend him highly.

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7 years ago

Professional, and the excellent staff, put me at ease, for a life saving procedure. Happy my doctor gave me the referral...

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Review Highlights - Ernest F Ribera, MD

Ribera is a compassionate, highly qualified and supportive endocrinologist who honestly cares about his patients.

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Eugene Y Lee, MD

Eugene Y Lee, MD

3.9(23 reviews)
3.6 mi

Had my first ever colonoscopy with Dr. Lee. My experience was more than satisfactory (under the…read morecircumstances). Dr. Lee has great staff, and his process is very smooth. He spend just enough time with during the first visit to explain everything, in simple terms, and answer any questions. On the day of the procedure, everything was done perfect. I don't remember the actual procedure as I fell asleep after the doctor told me that he was going to start administering the medicine. At these words I woke up, and I was all done! My wife picked me up, and I was completely up and running within hours. Fully recommend Dr. Lee, and will see him again in 10 years!

First, I would like to say that Dr. Lee is an excellent physician. He is patient, attentive, and…read morenever makes you feel rushed during appointments. He truly listens and takes the time to address concerns, which is greatly appreciated. Unfortunately, my experience with the front desk receptionist, LYNN, has been extremely disappointing. Interacting with her has been frustrating and discouraging. She comes across as very unprofessional and lacks the patience and compassion that are especially important in a medical office -- particularly when working with elderly patients or individuals who may struggle with technology, such as online portals or email communication. Instead of feeling supported, I often felt as though getting assistance or scheduling an appointment was an inconvenience to her. A medical practice should be welcoming and helpful from the very first point of contact, and that has not been my experience. It is frustrating and painful to deal with this woman. Dr. Lee provides wonderful care, but the front office experience does not reflect the same level of professionalism and compassion. I hope this feedback is taken seriously, as the right front desk staff can make a significant difference in patients' overall experience.

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Robert Osterhoff, M.D

Robert Osterhoff, M.D

3.3(7 reviews)
0.2 mi

I was refered to Dr. Osterhoff by my primary care physician, Richard Jordan (see my review.) The…read morereviews I have seen & my docotr talking about him put me at ease that this was the right decision. He is very nice, thoroughly explaining everything to you & what to expect & different theraputic options. The staff I innitially talked to about a colonoscopy was very friendly & thorough. I came in to see him for my GERD which he did an upper endoscopy for at the same time. Fastforward a month & yesterday, was the big day. He came into the room & went over everything & made sure any questions were answered. Once in the or, Joe & Cindy, the or tech & nurse were wonderful, as was Dr. Phan from anathesiology. They made sure I was comfortable & the tests went well. I had a couple polyps on my colon & some stomach polyps which are normal for taking antacids. He came back in my pre/postop room & went over everything as did Mark, one of the nurses & Cherity was the nurse who started my iv & did the innitial work up. So, for wonderful gi care with a friendly, knowlegable, & caring doctor & staff, Dr. Osterhoff cannot be beat. Keep up the good work guys.

Worst Doctor ever. Was super dismissive and had little time to talk - seemed like he had more…read moreimportant things to do. I asked him (a GI) if there was any connection with the brain and the gut and he immediately answered no despite hundreds of research studies that points to the fact there is a connection. He never mentioned that there was a possibility of cancer until I came out of my colonoscopy and asked him how it went and he said 'Well you have cancer." No bedside manner exists, personality is non-existent, and generally seems like a miserable person. If you hate your job that much, why do you keep showing up and taking the lives of your patients into your depressive hands. UCSF should revoke his degree.

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Prachi S Nene, M.D

Prachi S Nene, M.D

3.0(2 reviews)
0.2 mi

I've seen Dr. Nene a few times now. She is amazing and thorough. She is always on time, she always…read morepresents with a smile and her follow through is 5 stars. In addition, her staff is friendly and engaging. For my first visit, I was having some alarming symptoms. Her staff made me feel heard and got me in on a cancellation. I had an office visit with Dr. Nene, we discussed my symptoms, she put me at ease but said she would like to get a better look at things. She ordered a colonoscopy and labs. Before I left she made sure I understood what she was concerned about, her medical assistant informed me in writing what the procedures and tests were called and answered all my questions. My procedure went smoothly and she was happy with what she saw given my symptoms. She told me she would follow up once all my lab results were back. She did just that, about a week later she emailed me all my results and told me next steps. For once I have a doctor that is on top of my health instead of me always running after them for answers. I've seen Dr. Nene 3 times since that appointment and each time she made me feel like we were working towards the same goal. She explained pros and cons of each treatment route for my condition and let me decide which route I preferred to try first. She's talented and a respected doctor all around!

Very unprofessional staff and rude. Her administration team asked me what to write on their medical…read moreform to request Ironspan to appeal that medication. Nothing got approved and my mother went 9 months without her ironspan iron medication. Very disappointed.

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Prachi S Nene, M.D
Prachi S Nene, M.D
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Stefan J Chin, MD

Stefan J Chin, MD

3.1(14 reviews)
0.3 mi

My friend, a retired nurse, provided me with the recommendation to see Dr Chin. When I arrived,…read morethe very first form the admin had me sign was a financial responsibility form for labs, etc. Hmm, that was the first red flag. My appointment was right before lunch, and he was late by 35 mins so by the time we were done, it was during the admin staffs' lunch hour. After the 15min with Dr Chin, I left the office to use the restroom prior to picking up the lab boxes. When I returned, I found the door to the office to be locked, and spent 5mins outside waiting for the admin to open the door. Why would they lock the door? This isn't a supermarket or Trader Joe's with last minute shoppers trying to get in! The doctor ordered 2 lab tests, and when the admin (heavy set, Filipina I believe) provided me the lab supplies, considering the financial liability form I signed I had a few questions regarding Medicare coverage, she was very short with me. I think she was irritated at dealing with me during her lunch break. Net, she had no answers regarding coverage, and told me to call the numbers on the lab forms. Of course, when I called both numbers the following days (2 diff labs), no one returned my calls. After she provided the lab supplies I left but forgot to grab my hat. So I am banging on the locked door, this time for 10mins before the admin came to open the door. I tried calling but of course no answer, similar to the complaints and comments of the other reviewers. While Dr Chin may be a solid GI doc, the whole experience was a turn off. This medical group should consider spending more $ on the admins/experience, it's not like they cannot afford it. I ended up seeing a GI doc at Stanford who is excellent, informs me of what Medicare covers, and very happy I made the switch.

Dr. Chin helped diagnose a troublesome feeling in my chest which ended up being GERD. Through the…read moreentire ordeal he talked me through his thought process and the liklihood of it being x or y, while respectfully addressing my concerns. It felt like he was really in my corner and wanted the best for me. The endoscopy to confirm was also straightforward and well-explained.

Roger Kao, MD

Roger Kao, MD

4.6(79 reviews)
9.4 mi

Dr. Kao is wonderful. He is absolutely very professional, efficient and supportive. He has the best…read morebedside manner. It's very comfortable to talk with him and the way he did the procedure is gentle and caring. Most of the nurses and staff in his clinic are very nice, but a few of them are just like robots.

I cannot say enough wonderful things about Dr. Roger Kao and his incredible team! From the moment I…read morearrived for my procedure, I felt like I was in the best hands. Dr. Kao and his staff were not only professional but also incredibly warm, caring, and empathetic. He's a doctor who really knows how to get to the bottom of things (no, that won't be the last pun...unfortunately). I was initially nervous about having my procedure done without anesthesia, but the team immediately put me at ease. They explained everything thoroughly and made sure I felt calm and relaxed throughout the process. To my surprise, the procedure wasn't bad at all! Seriously, on a pain scale (1-10) it never got more than a 2--and that was only for about a second. I know pain tolerance is subjective, but I had NO pain during this procedure (Pain is in the brain!). Dr. Kao and his team's calming presence and genuine concern for my comfort made all the difference. I feel bad because I forgot the name of the lovely lady who was talking in my ear and calming me, literally the entire time, while Dr. Kao was....getting to know me. The whole team kept me calm and even made me laugh during the procedure--Who knew a colonoscopy could be this much fun?! Dr. Kao and his team are not just skilled, they're also incredibly compassionate. He and his team never made me feel like just another patient; they treated me like a person and I genuinely felt cared for. So, if you're looking for a gastroenterologist who will handle your care with dignity, professionalism, and maybe even a little humor, I can't recommend Dr. Kao enough.

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Roger Kao, MD
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Ernest F Ribera, MD - gastroenterologist - Updated May 2026

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