She is kind, knowledgeable and has a great staff, who have been with her for a long time.

I have been going to see Dr Sienella now for over a year. I've had my initial doctor visit and 3 cleanings in about a year and a half. I'm very happy with the quality of care. The office staff are pleasant. The dental hygienists are excellent and pleasant to interact with during cleanings and procedures. I highly recommend Dr Sienella T. I'm very happy I switched dental practices and found such a well educated, excellent dentist. The office is extremely clean and functions well as well. I also don't feel they are trying to upsell me or cram in too many patients as my previous dental office was doing constantly. That was the brothers on Morro Rd. read more

Sienella Thomaszadeh, DDS - Inside. Dec 2024 - General Dentistry Near Me - Atascadero, California

As an adult male who is terrified of going to the dentist, and having suffered childhood trauma at the hands of my childhood dentist, finding Dr Thomaszadeh has been a prayer answered. The entire staff are amazing and treat patients with respect and make it fun. I recently had a cracked tooth and she saved my tooth with a Crown, and it feels amazing!!! Great Dentist!!! read more

Worst experience ever had making an appointment. Girl on phone did not want to work. Bad look. Dentist may be good if you get that far. Called 3x now going elsewhere read more

Went in for a cleaning last week and Dr. T's staff were all pleasant and conscientious and professional! And the cleaning was just as easy and thorough! Melissa did a great job!! She is careful and always sensitive to the patient! Sounds strange...but always enjoyable to see her and the entire office! read more

My visit today having a crown placed was actually wonderful! I never thought I would say that a dentist experience was pleasant. I am new resident in the area and searched for a specialized dentist and I found Sienella Thomaszaseh, DDS. I could not be more pleased. Not only is she an excellent dentist she is graceful and truly talented. I didn't feel a thing!!!! Her assistant was also pretty amazing. Totally top notch work and I could feel the synergy between them as they worked together. Pretty Awsome experience! If you are particular and want a serious dentist that seems to care about their craft. This is the place. read more

I booked an appointment with Dr. Thomaszadeh after my dentist-nervous mom raved about her. First, their covid plan is on point-- patients wear masks and are never crowding the desk or halls, staff is fully outfitted, and their communication around keeping both staff and patients safe is really excellent. You text them to let them know when you've parked, and they let you know when they are ready for you to mask up and walk in. A staff member will meet you outside of the front door, hit you with a cute forehead thermometer, and then you'll be ushered in and shown to your exam room. They'll let you know when to take off your mask. I've been one to err heavily on the side of caution where covid is concerned, so I was a bit nervous for my first appointment, but their safety practices put me totally at ease. They're busy, but appointments aren't a huge struggle to get here, which is a huge relief. If I had an emergency, I feel confident that I could get my needed care quickly. The office and dental hygiene and dental assistant staff here is warm, professional, and really great, as is Dr. Thomaszadeh herself. Dr. Thomaszadeh is a straight shooter, and presents observations, options, and recommendations in a way that is friendly, educational, and helpful-- without feeling like a sales pitch. I've been really impressed. Overall, glad to have found this provider. read more

The office was pleasant and friendly. The X-rays were done and the dental exam showed I needed 3 crowns and a filling. After going over each situation with the Dentist I felt like the work was necessary and set up appointments to get all the work done. read more

Honestly dread going to the dentist and haven't seen one in 25+ years. However, after today's check up. I will definitely visit more frequently. All of the staff were so welcoming and friendly - from receptionist, nurses and dentists. Highly recommended this clinic. read more

Great service! Very friendly and professional staff!! Dr Thomaszadeh is wonderful! Very professional and well educated. I won't trust my oral care with anyone or anywhere else. Thank you for the great service and wonderful experience. read more

Very friendly staff. Have never had problems rescheduling and appreciate the text reminders. Very professional as well.

I switched dentists a few years ago after my last practice was bought out. My original dentist was someone who remembered me when I came in, offered free whitening for a special event I had coming up, and his staff was always pleasant. The new dentist that bought the practice was chronically late and basically did the bare minimum when he finally did come in to review my x-rays. His own dental hygienist had to basically shame him into not standing me up for the third time. The office staff was disorganized and unresponsive. The final straw was when they didn't call me back to reschedule a cancellation and failed to call when I had an outstanding bill due to my address changing. Dr. Thomaszadeh and her staff have been such a breath of fresh air. The doctor was super thorough and informative when she reviewed my x-rays with me (not AT me) and I learned things about my teeth that no dentist had ever even mentioned before. She took her time and was very professional, but obviously cared that I was a person and not just a name on the list. I've had a few cleanings now and my hygienist, Elizabeth, is wonderful. She gives specific feedback on areas to pay attention to and is always kind, but thorough without making my mouth hurt. I also appreciate that this practice uses technology for appointment reminders and their office staff is organized. My employer offered an HSA plan last year, so I wanted to wait for enough funds to collect in it and pay for my dental bill that way, which would have made it past due since the HSA was so new and didn't have much of a balance. This office worked with me on the billing no problem so that I could pay using the HSA instead of out of pocket. I recommend this dental practice to anyone and everyone. They are the kind of people that belong in healthcare. read more

I was with Dr. Romanelli for over 20 years. I stayed on with his practice because I believed in him. Since seeing the new dentist for some reason I have all these new problems that never seem to be problems. It seems like prices have really increased an example is I was in last week and dental floss is now up to $8.00 It used to be $4.00 . And when I get asked by two different members of the staff if I Know anybody looking for a dentist that wants to come over to their practice I feel like I'm being solicited read more

Great team great care . They got me in and out fast and were very good with my care and feelings.

I had a great first experience with all the staff here. Everyone was very helpful, kind, and professional. Dr. Thomaszadeh was very personable and communicated all procedures in a clear manner. I know I'm in good hands here! read more

Comfortable office staff. Sienella is amazing.

I have not been to the dentist in quite some time. I love the friendly office staff and how they talk you through everything. So happy to have a pretty clean smile again. read more

Dr Thomaszadeh and her staff do great dental work and really make their patients feel comfortable and we'll-informed. I'm confident and at ease about the work they do! read more

Excellent service as usual! The girls at the front desk were very helpful with my floss and whitening purchases also!

Love their COVID plan in place. Felt so at ease and confident during my visit. Professional and courteous service by all the staff. Highly recommend this office! read more

I came in for a standard cleaning plus x rays. Half way through the visit the secretary came into the room to mention to me that my insurance is not taken by the dentist. I mentioned that it's late To be telling me this.​ I received the bill for $ 348.00 I called and talked with the dentist and mentioned to her about the situation. I told her that i would pay them a reasonable price but not the full price. She disagreed. Now it went to collections with more fees taxed on. I see this dentistry as a shaddy business and not willing to work with me since their secretary made the mistake. I cant give less than star here. But i give their professionalism a minus 5 stars. read more

First off I'll be the first one to say I'm not a fan of going to the dentist. However, this doctor has changed my feelings of that completely. Dr. Thomaszadeh was kind, thorough, diligent and extremely knowledgeable in her practice. She actually took the time to tell me how she was going to fix the issues I was having. Never had a doctor like this. The office ran like a well oiled machine and was spotless. I've never experienced this before and I have to say I'm happy I found this place. Highly recommend and am actually excited to come back! read more

Wow. Professional, thorough, and above all friendly. Dr. Thomaszadeh and her staff go above and beyond to provide outstanding oral care for their clients. My teeth have never been cleaner, and my smile has never been brighter. I've been to many dentists, and I have never had a friendlier experience. I actually look forward to my dentist appointments now. read more

the absolute best dentist I've ever been to and I've been to a few. I highly recommend.

Friendly staff and extremely patient doctor. She took her time explaining to me everything about my oral condition, and provided a clear path forward. Thank you! read more

This Dentist and staff are amazing! I hate going to the Dentist but they are wonderful. Highly recommend!

The staff there are awesome I always feel well cared for. They listen and give good explanations that you can understand I would recommend them to anyone. Dr. Thomaszadeh is the best she asks you about treatment but doesn't pressure you. read more

Wow I just had a terrible experience. I found the dentist to be less than professional. I do not recommend her at all

I'm very happy with Dr. Thomaszadeh. She's great at what she does and her staff is too. Everyone seems happy and that's a good thing.

Great service today from receptionist to dental hygienist, Elizabeth Ray. They make you feel special. Ed

Dr. Thomaszadeh is great along with her friendly staff. They are great at what they do and do a great job with making you feel comfortable. I would highly recommend visiting this office. read more

This was a first patient appointment. The office staff was great, very friendly. The dentist was very friendly also. She spent a LOT of time examining me, by far the most thorough dental exam I've ever had. I feel completely confident in going back to her for any care I need in the future. So far, highly recommend. read more

Made a mistake about my appointment time so I was a little late but was treated very rudely by the staff. I apologize for having the wrong time but don't worry this will not happen again because I won't be coming back. read more

Most people can't say they love going to the dentist but I really do enjoy the staff here and kinda feel like I don't mind going to the dentist at all haha it's clean, friendly and you feel like you are visiting with friends. Highly recommend read more

From the start of the appointment to finish, Dr. Thomaszadeh and her caring staff offered the best service, making me feel safe and comfortable. Beth Anne gave me one of the best cleanings I have ever had and made sure that I was comfortable the entire time. During my exam, Dr. Thomaszadeh was thorough and clearly explained what she was seeing and what options were available to me. The office is extremely clean and there were several safety protocols in place such as waiting in my car when I arrived, rather than the waiting room, and having my temperature checked at the door that made me feel that the office cares about the well-being of the patients. I have already made my next cleaning appointment and am looking forward to it! read more

The office is amazing! Super Covid compliant and friendly! I really appreciate the warm feeling you get there....oh and super clean teeth!

Very professional and courteous. Covid precautions are taken very seriously. The staff is friendly and knowledgeable. Best dentist in the area. read more

Great dentist and hygienist staff! Would recommend to anyone! Always a professional feel, but also personal touches.

Made a yelp account just to leave a review, which I never do. I work at a dental office as well. Called the receptionist to get some info, receptionist was being super rude and double questioning me. I hung up in disbelief and decided to write a review, really unprofessional. read more

Really knowledgable and professional! Every one who works there is kind and knows what they are talking about. They always are willing to answer any questions I have. They have handled all tooth issues quickly and knowledgeably read more