This may have been the single least painful dental procedure in my decades of health care. Doctor Tarm was very careful about not causing pain and he didn't. I also have a bad fainting issue around needles as a consequence of many childhood surgeries and during my procedure the doctor and nurse were both careful to keep needles out of my line of sight and ask me to close my eyes if anything sharp was at risk of crossing my field of vision. If I'd had dental professionals this kind and competent when a child then my teeth would be in infinitely better shape...Everyone who mentions their horror at a root canal I'm sending here. read more

After a night of escalating, excruciating tooth pain, I contacted TVE and although they had a full schedule, their very kind and accommodating staff worked to schedule an immediate evaluation appointment. Dr. Harrison Nguyen was extremely patient and agreed to perform a same-day root canal, which my general dentist had inferred would be necessary if my tooth pain did not resolve. Unfortunately, the pesky molar ended up being internally cracked and impossible to save; however, Dr. Dr. Nguyen's skill and manner could have not impressed me more. The office was able to refer me to an oral surgeon for immediate treatment, and I was billed in a very fair fashion for the work Dr. Nguyen performed. This practice should be a model for the way medical care is conducted - bravo! read more

I love this place! I started my root canal at a prior Endodontics facility in San Leandro and had a bad experience. I was referred here and was met with exceptional customer service by the doctor and his staff. In terms of the procedure, it couldn't have gone more seamless. I had 0 pain throughout the whole experience and the following days! Keep it up! read more

Yay!! Finally a good dentist! I've had my share of bad dental experiences. Shady billing, incomplete root canals, file separations, cancelled appointments, you name it. I have bad teeth so I need a good endodontist. Dr. Tarm gave me my options with pros & cons of both, had an efficient team, quick appointments & most of all my root canal only took an hour!!!! Can't believe it. Simply uh-mazing. BTW I would also mention that the magazines in t waiting room are current but it doesn't matter because you don't have to wait long enough to read them! read more

Totally great atmosphere, the endodontist explained everything & I felt totally comfortable with the procedure (root canal). Hurt a lot less than I remembered! Great place to go! read more

Dr. Harrison Nguyen is an outstanding, kind, and gentle provider. I was so relaxed and numb during my appointment that I almost fell asleep. He makes me enjoy getting root canals. His bedside manner is considerate and he takes the time to explain what to expect. He truly cares about your comfort and well being. I would send anyone to see him. read more

Dr Nyguen is wonderful. He really takes the time to go over your procedure with you. Very thorough and all the staff are friendly.

Dr. Nguyen and his staff did an excellent job with my root canal. Every aspect of the process was done in a very professional manner. The actual procedure was painless. I was so comfortable, I fell asleep while he was working. No issues after the work was done. This guy knows what he is doing and he is very skilled. read more

I have just completed a root canal, my first, with Dr. Nguyen. I recommend him highly. He is thorough, efficient, and, best of all, explains what he's doing every step of the way. I had trepidations about a root canal but walked away quite pleased with the process. His assistant Denise is also efficient and thoughtful. read more

Came here for a root canal. Was very scary for me being my first time, mixed with the stress of not having insurance, it was a difficult week leading up to this appointment at Tri Valley. From the moment I walked in the office I was greeted and treated like a regular patient. Staff was very caring and welcoming of me. They made arraignments to squeeze me in the next day. The root canal was painless! I was told to take Motrin for pain that may last 5 days. I haven't used it at all and I feel 100% back 1 day after my operation. I even received a call next day checking on my tooth. I highly recommend this office for any body that wants to be treated by a staff that actually cares about the patients needs and not just the check!! read more

My first root canal. I hope for this experience every time. Dr. Tarm and his assistant are complete pros.

They did a great job diagnosing and repairing my root canal.

These guys are the best! I've​ had Dr. Tarm and Dr. Nguyen and both are 10 out of 10. I hate the dentist or anything that has to do with it, that is probably why my teeth are so bad. I had a bad experience in the past with a root canal. But Try Valley Endo really takes care of you. They are always concerned about how you feel and making sure you are comfortable. It was the easiest procedures I've ever had. read more

Great experience with Dr. Nguyen. I needed to redo root canal I did long time ago. Dr. Nguyen explained my treatment well and was careful and professional while performing work. read more

Was on vacation in Nor cal and the pain in my tooth that was bothering me for weeks had become just too much! I called around and Tri-Valley was able to squeeze me in for an appointment! Dr. Nguyen made sure that I needed a root canal by doing a cold test and ct scan, then showed me why I needed a root canal! I was expecting to be rescheduled but he canceled his lunch and said he could do one immediately! His staff was very helpful with the paperwork for insurance! He explained each step of the root canal and I was surprised by how relatively painless it was! I was pain free the next day! Tri Valley saved my vacation! read more

I've been to Dr. Tarm's office way too many times for the last few years for my liking. To the point that Dr. Tarm and I joke that I deserve a season pass. I am not a Endodontics specialist, but Dr. Tarm is by far the best caring Endodontics out there. Very professional and straight forward towards his patients and staffs. The office is clean and bright. I dislike going to the dentist, but at least I can say I feel safe going to Dr. Tarm and kowning that he will do a good job yanking my roots out. Even my 7 year old daughter feel comfortable going with me to Dr. Tarm's and wait for me to get my root canal done. Good job Dr. Tarm and I hope I don't have to see you again or anytime soon. Knock on wood. read more

My Dentist, Dr. Vivian Cheng referred me to Dr. Tarm for a root canal. I can surely say, Dr. Tarm is the absolute best endodontist around. The office is immaculate, clean, relaxing and I can report that Dr. Tarm is friendly, kind and cares about his patients. I ended up having to go back recently for a referral for a tooth extraction and I again as treated very well by Dr. Tarm and his staff. I highly recommend Tri-Valley Endodontics. read more

I was referred here from my dentist because they assured me they were in my insurance plan. When they quoted me $1600 for the procedure I question that and they told me it was because I was out of network and not covered by my insurance. Total scam! read more

I have been a patient of Dr. Tarm for over a year now. He is simply amazing, his staff is so very friendly and I never feel rushed. It is quite a commute for me to drive from Tracy to Pleasanton, but it is all worth it. read more

Very professional. Made me comfortable and at ease. Was nervous about my first root canal but ended up taking a nap during the procedure which is unheard of. Thank you dr. Tarm read more

I was referred to Dr. Tarm for a root canal...my first one! I was quite nervous but immediately felt at ease once the doctor discussed the treatment with me. Nobody wants to go through that, but if you must, Dr. Tarm is the one to go to. The office is clean, soothing, and organized. Dr. Tarm communicated all of the steps with me along the way and made sure I was comfortable during the entire procedure. read more

I found Dr Tarm on Yelp and hoped that all his reviews weren't fakes :) I am TERRIFIED of the dentist. My teeth are extremely sensitive and it's nearly impossible to numb anything in my mouth, so when it was determined i needed a root canal on a fractured molar, i thought i was going to die. Dr Tarm and his team are nice, extremely helpful and most importantly, he was confident he would be able to numb my tooth. I was still sweating and panicking about it, but yes! he did eventually get me numb and it wasn't nearly as traumatic of an event as i was thinking. I highly recommend him :) read more

Thank you so much to the whole staff at Tri Valley Endodontics. My husband was suffering from a nerve/tooth issue and needed an emergency root canal. With our regular dentist on vacation and several dead end phone calls, I tried one look at yelp and found a Tri Valley Endodontics. All I had to say was emergency and even though it was nearing the end of the day, Gilbert said "come on in, we'll figure it out". We got there, got right in, and a couple hours later my husband came out smiling. Everybody was reassuring and didn't mind at all that we had our three year old in tow as well. I will definitely be back to this office for any specialty work. Amazing staff. Thank you! read more

We called the office for a exam, since my son got sensitive teeth after couple fillings done. We didn't use the referral one from our family dentist..... Searched up on Yelp, then I called this office, the front desk is supper helpful and quick, squash us in for a 30 mins exam on the same day. This help us a lot! Dr. Nguyen did cold test and ct scan/x-ray. He gave us then showed us, explained very well why got sensitive teeth after the big fillings. I am scheduling a exam with them for myself to see why I have bone lost on my tooth after the tooth crown done 5 years ago. The doctor and his staffs provided exceptional customer service. We love this place! read more

I had a terrible experience at Tri-Valley Endodontics. I am not complaining about the actual work done, but instead about the experiences I had interacting with Dr. Tarm. He has zero people skills. He didn't explain what he was doing. He was silent throughout my procedure. It is scary to have a root canal, and they made the whole process much worse. It was horrible sitting in the chair, with no interaction during the procedure. He stood behind me while talking to me and wouldn't look at me. He did not treat me as a person, but just as someone who would pay him for the work he would do. He didn't want to discuss treatment options. He seemed upset that I wanted to discuss options. read more

I have been to a few endodontist Dr Tarm by far is the best one have ever been to very clean office he and staff were great read more

I dont think I would go back here. Rude staff and doctor is not a people person at all! Zero stars, I wish.. read more

Excellent experience with rush root canal. Great staff and Dr. Tarm was very thorough in explaining my treatment options. I'm so glad my dentist recommended this office to me. read more

No one... I mean NO ONE is as terrified/petrified of the dentist as I am. So after not getting a tooth refilled after the filling fell out 2 years ago... I was disgusted and dismayed with myself. Thankfully I am not alone and while discussing my predicament at work a colleague referred me to Dr. Tarm. I am not kidding when I say having fillings was FAR more traumatizing than my first root canal. Dr. Tarm has all the latest tools and technology. He and his staff are warm and caring. If I ever have to have any more root work done... it will ONLY be Dr. Tarm. Thank you so much for not making me feel like an overreactive sensitive fool which I probably am... :-) read more

Dr Harrison Nguyen is a fantastic doctor I had a lot of trepidation about having to get a root canal procedure. But Dr. Nguyen is an excellent Dr. with tremendous skills and a patient manner. I hope to never have another root canal but if I do I will not hesitate to contact Dr. Nguyen he was truly fantastic. read more

Couldn't believe my root canal was pain free. Harrison Nguyen DDS MSD is badass

I had a consultation with Dr. Harrison Nguyen for a possible root canal. He was very professional and explained everything about the procedure. I was a bit worried about the dreaded RCT but it was completely painless and he was very quick as well. I totally endorse Dr. Harrison. I hope I don't need another root canal but if I do, I know where to go. Thanks Doc. read more

Dr. Tarm is the man!! He always has the answer and sees things through. I would highly recommend him to anyone.

I was so nervous; He was very gentle I didn't feel any pain or discomfort. During the all procedure he constantly ask how you're doing. Everyone was so nice. My family is been going to them for a few years. I highly recommended. Gilbert and Jasmin are awesome!!! Thank you for great services. read more

EDIT: Yelp keeps removing my review but this is 100% based on my mother's personal experience with this particular office. Again, I emphasize that the procedure itself went well but the overall experience was ruined by the fact that they blindsided her with the billing. This review is for my mother who had a root canal procedure done with Dr. Nguyen. Per my mother, she didn't have any issues with the procedure, but her experience with the financial dealing left a foul taste in her mouth. In preparation for her procedure, my mother triple checked the final cost with the financial worker prior to the actual date of her oral surgery. It was settled that her insurance would cover the majority and she would be responsible for about 300 dollars. The day of the surgery, however, was a completely different story. The office was going to have her take more "normal" xrays despite her regular dentist having sent them to the office already. They assured her that everything would be covered. Then they had her take a 3D xray which they did NOT mention would be her responsibility to pay. What pissed her off was that the office seemed already aware that 3D xrays are rarely covered by insurance companies. They had her take the 3D xray FIRST and then later, while they were administering the anesthetic and had her mouth pried open, completely blindsided her as they insisted that she sign papers for the 3D xray because the cost was completely her responsibility. That's an additional 350 dollars they tacked onto her original portion. They did not mention anything beforehand despite probably already knowing that it would not be covered. They should have communicated this way before taking the xray instead of telling her AFTER they already took it. It definitely feels as though this particular office looks for reasons to charge you more money. read more

I can't give them enough stars. Was refered here by my dentist because of pain in a cracked tooth. They saw me on only a couple hours notice and had me in and out for a PAINLESS root canal. Problem solved and pain free, Dr. Nguyen was very caring and accommodating. Couldn't have had a better experience! read more

My dentist referred me to Dr. Nguyen of Tri Valley Endodontics for a root canal. My experience with this group was all positive. The office is neat, clean and well organized. The staff was extremely helpful, pleasant and attentive. Dr. Nguyen himself was very generous and clear with his description each step of the way. His technique feels very expert while he's working. I'm overly sensitive to dental pain of any kind, and fear the needle as much as the drill. Dr. Nguyen took his time with the numbing and used several different approaches, getting the job done with maximum efficiency (which is important when you're talking about needles). During the operation, his competency was apparent, and the communication between him and his able assistant created a relaxed (as much as is possible in a root canal) environment. The result was a successful RCT with minimal next-day pain! Doesn't get better than that. read more

I did get a root canal with no problem and the procedure went fine. The staff even called me the next day to see how I was doing. However, they do make you pay up front, which I had no problem paying. Yet, after my insurance company paid them in about 2 weeks or so, they overcharged me $43.60. So, I said okay, their billing department should refund my money. I called and they said they would refund my money, but it will take 90 days to issue the refund. Seriously 90 days? Do you give 90 days to your patients to pay you for a treatment that you received? You even asked me for the money up front or they could not preform the procedure. Also, I am sure they would hound them for their money as well. Each month once or twice I would call, and depending upon who answers the phone the typical response would be 'Oh its with the accountant' or 'Oh, it's in the mail.' We are about to hit the 90 day mark and still no refund check. Not saying that its a large sum of money, but its the principal of overcharging your patient and not returning the money that is rightfully theirs. Keeping my fingers cross otherwise I will have to go down a road that I don't want to go down. This is also to serve as a warning to future patients is try to get a better estimate from your insurance company first so you do not have to wait for a refund check. read more

I would recommend Dr. Harrison Nguyen for endodontic work. He explained the procedures thoroughly both before and during the work, was extremely careful to avoid any pain or discomfort, and. when it became evident that the tooth could not be saved, greatly reduced his bill even though he had already spent a lot of time working on the tooth. A root canal is never pleasant, but Dr. Nguyen made my experience the best possible. read more

Doctor Tarm is awesome and staff is great. His work is excellent and he even came in just for me for an emergency on his day off.