1. Deborah Negusse, MD

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Rancho Cucamonga, CA

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Deborah Negusse, MD

4.0 (26 reviews)
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Reviews are generally positive, with many highlighting the professional and friendly staff and the clean and welcoming facility. Patients also appreciate the thorough explanations provided.

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1 year ago

My experience here was great! The staff were very friendly and helpful made me feel secure throughout my pre-screening and after.

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1 year ago

Great experience! Corrine, the manager, was able to get me in the same day. The office is beautiful and clean.

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Review Highlights - Deborah Negusse, MD

“I waited a few months for my insurance to add her to my network because I didn't want my 2 GI procedures done by any other doctor.”

Mentioned in 2 reviews

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Andrea S Tieng, MD - See message

Andrea S Tieng, MD

3.1(31 reviews)
1.5 mi

I really appreciate Dr Tieng. She takes time to listen. She seems very down to earth and is easy…read moreto talk to. For years I have had stomach issues. No doctor ever told me why I had constant pain and bloated. I was just repeatedly given heartburn medication and nothing helped. Dr Tieng tested me for SIBO immediately and it was positive. My insurance didn't cover the antibiotics but she kindly provided samples. My stomach immediately felt better! God know how long I had been dealing with that. I like that I can email her office and get a responseand that she follows up w a staff call to see how I'm doing. I have never had any issues w the office staff. They have all been kind and prompt. While I'm still having some stomach issues I am happy to have found this Dr. Update:. Another 5 stars. I left me meds when out of town and her staff Tabitha, met me near my work to provide me samples so I can finish my course of antibiotics. She did not need to do that and went above and beyond the call of duty. On another note I really appreciate that Dr Tieng has staff who look at emails and offer to email lab orders by email. Saves so much time. Thank you!

Find someone else. Ms Tieng is the rudest, most vile doctor…read moreI've ever had the displeasure of "doing business with". She was almost 3 hrs LATE for my appt, no acknowledgement or apology. No call to let the staff know. Just left the patients sitting buck naked in a gown, on a gurney for hours. When I expressed my displeasure she didn't give a rat's patootie and told them to knock me out for the procedure. I would happily tell ms tieng to go jump a rope. Hope you trip. I've recommended to my physician to never utilize ms tieng's services. My Dr notated that this was not her first complaint regarding ms tieng. Date of service 10/2025

Pejman Solaimani, MD - Riverside Digestive & Liver Health Clinic

Pejman Solaimani, MD - Riverside Digestive & Liver Health Clinic

2.9(17 reviews)
13.6 mi

Dr. Salaimani is a wonderful Dr.. after my second endoscopy he called and explained the results and…read morethe treatment plan. After that, I had an ultrasound of my liver and found an issue so I made an appointment. Unfortunately I was seen by a nurse practitioner who launched into the results from a while ago that I already talked to the dr. about. I stopped he and told her that I was there for a different issue. She said that she wanted to go over the results from tests done months ago and would get to the liver issue later. Update: No one answers the phone down there and instead an "AI" assistant answers but offers no help. My appointment with the dr has been scheduled 5 months out. The Dr is great- his support staff, including the snotty NP, is not helpful or caring.

Dr solaimani is kind and seems genuinely concerned and interested in helping you however , his…read moreoffice staff , computer system and portal are incompetent. There is no follow through . No one takes responsibility for the total care of the patient here . The office staff controlled solve, the portal doesn't contain results or provide easy assess to enter information regarding history ,medications etc At My first visit ,Dr Solaimani ordered labs and other tests unbeknownst to me. The office staff scheduled an appointment for me to follow up with the doctor two months after the first appointment for which I had to pay a $70 co-pay and my insurance was billed several hundred dollars. When I got there, they told me I hadn't done the labs the Dr had ordered. I inquired as to why I wasn't notified of the labs at the first visit , there answer was " well we must've had a student who put you in the room and she didn't enter your specific lab you use into the computer " . When I ask about why there was no follow-through on this why no one called me to inquire about why I hadn't had the labs before my appointment, they said oh we don't do that. We don't have any way to know about that. They kept referring to possibly a student that made mistakes the last time I was there. No one wanted to take accountability and they couldn't explain the process of how these things are normally done. It sounds like computers run this office, not thinking responsible people. The nurse practitioner I saw (when I had scheduled an appointment with the Dr) spent only 6 minutes with me informing me "all the results of my previous colonoscopy was normal) something the Dr told me after the procedure. Then ushered me out to schedule another appointment in two months after I complete the labs they had "previously ordered. When I ask about why I didn't see the doctor at this visit, as previously scheduled I was told "oh you have to tell us when you come in so we can put you in the right room to see the Dr." "We don't know who your appointment is with!" This office needs an overhaul from the top down! I feel they just want to schedule expensive procedures such as colonoscopies and EGD's , bill your insurance then dismiss you after they have completed these .I will not return!

Deborah Negusse, MD - gastroenterologist - Updated October 2026

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