Dr. Chassen was absolutely amazing. From the very first visit, his communication was clear and reassuring. Once he started working on my tooth, he realized how complicated my case, root canal was, especially considering his 40 years of experience, yet he handled it with such skill and confidence. I didn't even feel the needle, which says a lot about how gentle and precise he is. The entire experience was much better than I ever expected. I wasn't nervous anymore. The office is spotless, and his staff is professional, friendly, and welcoming. I am extremely pleased with the care I received and so glad I chose a specialist who focuses solely on root canals. I highly recommend Dr. Chassen to anyone in need of expert care. read more

On December 3, 2025, I saw Dr. Chassin because I had a severe infection in my gum. I asked whether the tooth could truly be saved because my oral surgeon had already warned me that it was in very bad condition and might need to be extracted. Dr. Chassin assured me that he could save the tooth, and I paid approximately $2,000 for the procedure. After the treatment, I expected the infection to heal, but months later the bubble on my gum was still there. I eventually developed a serious infection that required emergency surgery, and I ultimately had to have the tooth removed by another provider. This experience was frightening and extremely upsetting. When I called the office to explain that the procedure had not worked and asked about a refund for the treatment, I felt dismissed. I spoke with Diana, and in my opinion she showed very little concern for what I had gone through or the fact that I had experienced a serious medical emergency. Instead of receiving empathy or assistance, I was left feeling ignored. I was also uncomfortable that I was pressured to pay in cash from the beginning. This experience cost me additional money, additional procedures, and a great deal of stress. Based on my personal experience, I would not return to this practice or recommend it to others. read more

I had initially given Dr. Chassen a good review, but that was prior to my last visit. I found him to be nasty and any questions about procedures bothered him. He in my opinion was unprofessional From, Albert Higgins read more

So, I had a second root canal in January 2025. I had a previous one in July of 2024 on a different tooth. Dr. Chassen did excellent work. He is extremely pleasant and professional. I was not in any real pain after the Novocain wore off. I took an ibuprofen before leaving the office as recommended by Dr. Chassen. The office is clean and staff very efficient and friendly. read more

I also paid up front for my root canal, being told that my insurance might not cover everything. A month after my root canal, my insurance company finished processing the claim and what I was expected to pay for the procedure was about $300 less than I had paid the dentist. I contacted the office several times before I was finally able to speak to the famed Diane. She informed me that the dentist had done a procedure that they do not bill to the insurance company since the insurance company will not pay for it. Oddly enough, this procedure costs $295, so I wouldn't be receiving any refund for an overpayment. I pointed out that the difference between what I paid them and what my insurance said I owed was $309, not $295, so Diane sarcastically asked me if I wanted the $14.20 that was the difference. Now we'll see if that money ever arrives. read more

I was referred to Dr. Chassen by my dentist who had back to back patients and could not do the root canal. It was the day before Thanksgiving, 2020, and I was in so much pain that nothing was helping, meds, Anbesol, nothing. I contacted the office and was treated with kindness and urgency. I was told to come in asap. I was there in 20 min. Dr. Chassen performed a root canal and I did not feel a thing. He numbed me really well and all I felt was a little pressure here and there, but that was it. He literally cured me before the tooth became infected. He was gracious and I had full confidence in his expertise. I highly recommend Dr. Chassen as a professional dentist with empathy and great skills. Thank you Dr. Chassen and the staff for taking good care of me. You put my nerves at ease! read more

Great experience had a root canal the doctor was very efficient and his staff. Clean and safe during covid. doc Chassen was friendly and thorough. Nick Jan 2021 read more

Just finished my second root canal...must say this was by far one of the best dentist experience I've had. Personality got me to feel comfortable made me laugh...and the entire staff was super friendly. If you are looking for a great dentist, this is the place read more

Stuart E. Chassen, DMD - Office building - Endodontists Near Me - Bronx, New York

Avoid these "money blood suckers" like the plague. They do not care about their customers. They only want money. Which is horrible! Even in a damn pandemic, they think customers should pay for services that they never received. Consequently, I originally had an excellent office experience getting a root canal treatment. I paid (cold hard) cash - about $1,100 and was given a little bit discount. Which was still expensive when I found that the procedure could be performed $200 cheaper at a comparable dentist. But the dentist was knowledgeable and took his time, explain things, made me feel comfortable so I said, what the heck. My good experience at this office all changed after 6 months when the complete service was done. I get a phone call ( one day) from the office manager Diana who tells me that they made "a huge mistake" and that the "free consultation" I had received was not actually free at all. I would have to pay an additional $74 bucks. Unless they would be forced to report me to their credit collections. I responded why would I have to pay for their mistake, incompetence and/ or false advertising. Telling customers they would get a free consultation- when they did not offer this service. She replies, oh well nothing is REALLY free in life. Is it? I should know that. Which is atrocious for her say and to have such "a negative attitude" with once loyal & paying customers. Especially 6 months after the procedure. When I thought and was told by her that my bill was fully paid. So I guess I will be filling a report with the attorney general office and blasting them on social media for their fraudulent and bad business practices. Let's see how they like this review. It's free! read more

Stuart E. Chassen, DMD - Blood Suckers / Avoid - Endodontists Near Me - Bronx, New York

I had a severe and painful infection inside of two molars and needed two root canals. Dr. Chassen was able to skillfully save the teeth other dentists were hesitant to treat. I was in good hands with each step of the process. Also, his staff has been courteous and professional during and after the follow-up care. Overall, excellent. -Deb read more

I Went To The Bronx Location Referred to by My Dentist for a Root Canal...Hearing About Root Canals I Was On Pins & Needles. However, My Experience There Was Phenomenal!!! Dr. Chassen's Bedside Manner Remarkable, His Years Of Experience Impressive, Ease Of Hand Appreciated , & Numbing Me Up Enough To NOT Feel ANYTHING Superb! He Even Went As Far As Reassuring My Comfort Level , By Making Sure I Took Motrin Before Leaving His Office. I Would HIGHLY Recommend Him! "The Root Canal Specialist" And His Overall Staff Were AMAZING!! His Secretary Squeezed Me On His Schedule Last Minute & I Was Sooo Grateful!! read more

I was referred to Dr. Chassen by my general dentist office for a retreatment of a root canal that was improperly done years ago. The office staff was very helpful in scheduling appointments, completing insurance forms, etc. The office is very state of the art. I also enjoyed the music playing. Dr. Chassen was very gentle. He explained everything that he was doing and showed me why I needed the work done. I was shown the after results and in addition to being efficient, he was fast. I am very pleased and would definitely recommend this office for endodontic work. read more

I was referred to Dr. Chassen for a root canal and second opinion of a previously completed root canal. The staff was so pleasant, the waiting room and office was such a calm atmosphere. Dr. Chassen himself was a delight and explained everything to me thoroughly. The procedure was quick, efficient, and painless. I will recommend this office to everyone. read more

Thank you Dr. Chassen for taking care of my root canal. Service was excellent, felt no pain and I appreciate the before and after X-ray explanation. Staff was courteous and friendly. Highly recommend if you need a root canal. read more

I was recommended to Dr. Chassen through my general dentist because I was in need of a root canal re-treatment. My previous dentist had botched my original root canal, leaving part of the root in the tooth cavity, and not drilling deep enough to accommodate the post and crown that was put in place. After wearing Invisalign for about a year, my teeth obviously shifted, causing the faulty crown to completely come out...post and all! Hence the need for a re-do. Dr. Chassen's office is clean and comfortable and Diane and Bruni at the front desk are warm, kind and professional. What a pleasure when so many front desk personnel are rude, disinterested, and simply don't want to work. Dr. Chassen is very personable and excellent at explaining what needs to be done. He cares about your comfort level and truly seems to understand that going to the dentist can be scary for most. Just excellent all around. Kudos to Dr. Chassen and his entire staff!!! Thank You!! read more

This was the best dental work experience I've ever had! I had a root canal performed today, it took less than 40 minutes, and I felt absolutely nothing! As someone who has experienced pretty painful dentist appointments in the past, this was a huge relief and I certainly highly recommend Dr. Chassen to anyone needing dental work. He is kind, compassionate, and more than willing to explain the process and answer questions about the procedure. Best of all, he truly kept his word when he said I wouldn't feel any pain at all! read more

I had a great experience at this office. The receptionists were VERY welcoming and helpful. There was no wait time, I was taken to be seen right away. The nurse was so kind and helpful as well. When I first met with Dr. Chassen, he explained everything to me about what would be done. From beginning to end, two root canals were done in less than an hour! I felt IMMEDIATE relief. I took ibuprofen right after the procedure as precaution and then did not at all again! Dr. Chassen took his time and was very precise. Thank you so much again ! My only downfall would be that he does not tAke my insurance and it was a little expensive for me! Otherwise, I would be going back any chance I could! Thank you thank you! read more

I was referred to Dr Chassen by my dentist for a root canal that my general dentist couldnt perform. The office was very clean, but most importantly is that I was in and out of the clinic in about 40 minutes. Dr Chassen is so efficient, thorough, and explained every step as he was working on my tooth. He told me exactly what to expect and the whole thing was done so quick! Ive done 2 root canals here and I would come back without hesitation. read more

I had a root canal re-done by Dr. Chassen a couple of days ago and my experience from start to finish was nothing but great! I was super nervous since my last root canal took place at another practice which wasn't a good experience but Dr. Chassen and his staff made me feel comfortable and were very informative about what they were going to do / what is going to happen. I was actually amazed at how fast the procedure took and that he did most of the procedure by himself! What I found amusing was that during my appointment, they were training a new dental assistant (I'm assuming) and while they were taking my x-rays, the trainee was told not to wait too long taking out the instrument from my mouth because it's uncomfortable. In my head, I was like "Yes! Those X-ray instrument things are generally uncomfortable, I thought it was just me!" Hahah so that was a little enlightenment on my end. Anyway, definitely recommend their office 100% read more

Dr. Chassen performed a root canal for me. Let's face it... root canals are the one thing everyone dreads. I went to the office and I was very nervous and Dr. Chassen was very reassuring and him and his staff put me at ease. I didn't feel any pain and it was done fairly quickly. This is the place to go! His staff is welcoming and professional. read more

I was recommended by my dentist to their bayside office. I had an infection in my gums from a root canal. The office staff was wonderful and respectful. They made me feel comfortable. The doctor was amazing and i felt no pain at all, he was kind and caring to my every concern. I absolutely recommend this office and i had wonderful end results . THANK YOU Doctor Weiss and Chassen and staff! read more

My first root canal. I was terrified, everyone told me how painful it would be. Absolutely painless, the worst part was the novocaine. When I left the office my face was less swollen than when I went in. Zero recovery time, I felt absolutely fine. If you have to have root canal don't be terrified, just go to Dr. Chassen. read more

I went to Dr. Chassen approximately 5 years ago for a root canal on my one of my molars. I believe the cost was approximately $2,000. I thought everything was OK until I went to a regular dentist for the crown. The regular dentist informed me that the file of Dr. Chassen's drill was broken in one of the tooth's canals. Dr. Chassen never told me about it. I went back and was seen by Dr. Weiss who said everything looked OK and not to worry. The dentist said it may or may never cause me a problem. Well, for the last two weeks, I was in agony and could hardly bite down without pain. I went to a great endodontist in Westchester who had to do an apicoectomy. I had to spend another $2000 for the procedure. I am really, really angry that Dr. Chassen never told me about the file broken in my tooth and that I had to spend close to $4,000 because of him. I would give him 0 stars if I could. PATIENTS, BEWARE. Find another endodontist. Go to All County in Westchester. The best. read more

The best experience ive ever had with any dentist absolutely pain free I didn't feel the injection in my mouth I've always dreaded going to the dentist, unfortunately it was a referral but I'm going to try to change dentist as soon as possible even if o have to pay cash out of pocket, it'll be worth the changes. Thanks read more

My regular dentist referred me to Dr. Chassen. They were very quick to take my money for a root canal. I thought they were giving me a courteous nitrous treatment. Over priced. Fast forward a few months and I am still having significant pain in the tooth where Dr. Chasen had performed the root canal. I gave them the benefit of doubt by calling them to have them look at it and even the opportunity to perhaps look at another tooth. I was told by Diane Today that Dr. Chassen said I see another dentist. So basically they pretend to do work and then if there is a problem they refuse to look into it. Horrible and unprofessional. Save your money. Go elsewhere. read more

I had a root canal done by Dr. Chassen approximately 2 weeks ago and the when experience was amazing! When he told me that I "wouldn't feel a thing" I was a bit skeptical (I had a really bad root canal experience a few years ago with another dentist and it was anything but painless), but he was right! I didn't even feel the injection and now 2 weeks after the procedure, I'm still pain-free. His staff is great- they were able to accommodate me when I was running late due to being stuck in traffic. Also, their wait times for appointments and also to see the dentist when you get to the office aren't long at all. I would definitely recommend Dr. Chassen to anyone! read more

I have to say how please I was with my experience with a root canal with dr Chassen. So professional, painless and quick; it was such a pleasant experience. read more

Recently, I had a root canal at Weiss & Chassen DDS. Due to the horror stories I've heard about the procedure I went very relunctantly to have mine done. I was pleasantly surprised. NO pain, No Hassle! Very Happy Patient!!! read more

It's very unfortunate that the staff at this facility ruins what could be a wonderful experience. They are very unknowledgeable, and not very friendly. Everyone at this place looks miserable. When you walk into the "nice looking" office you get the feel that it's inviting.. however the moment you meet the faces of the staff.. it doesn't look too nice and inviting after all. From the assistant who took my xrays who was not very friendly, very rough and just looked extremely miserable. To the staff that handles the patient billing, who tried to overcharge me by almost $400 because she did not understand the insurance coverage. What a waste of my time! Hopefully the Dr's at this facility will reconsider their employees and maybe they would not lose patients. I wonder if the Dr's even know how their office is run. It's not like patients go there for fun.... we go there for pain relief and some help! Not to be mistreated especially when in pain : ( read more