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Thomas Dentistry is conveniently located downtown Mercer Island right across from Bank of America. Dr. Troy Thomas opened Thomas Dentistry on Mercer Island in 2007 and lives with his family on Mercer Island.
We offer a full range of services at our Mercer Island dentist office, including routine dental checkups, cleanings, and many other procedures to keep you and your family in tip-top dental health.
We treat patients of all ages, young children, teenagers and adults. We offer family appointments and extended appointment hours throughout the week to make scheduling an appointment easy and convenient for you. We know you’re busy and constantly on the run, so our goal is to make fitting in a trip to your Mercer Island dentist as easy and convenient as possible.
Dr. Troy Thomas, Dr. Gurman Jaswal, and Dr. Ken McNabb are here to help – whether you’re looking to achieve a new smile or have dental pain and need help, we are here for you on Mercer Island serving our community.
Thomas Dentistry accepts all major forms of dental insurance and offers an optional dental membership program to help pickup where dental insurance leaves off or for patients who lack dental insurance all together. Our dental membership program is far superior in cost and benefit than most forms of dental insurance!

Dr. Troy Thomas
General Dentist
Dr. Jessie Zou
General Dentist
Dr. Chris Clark
General Dentist
Dr. Ken McNabb
General Dentist
Dr. Gillian Lim
General DentistRead More Reviews
Read our reviews from all Patients.
Brianna Lyon (Brie)
Happy Client from Kirkland Office
“Everyone is very kind from the start. I have high anxiety dealing with my teeth and dentists; and everyone was incredibly helpful and informative! I'm really happy I found this place for my smile needs!”
Dennis Ferrer
Happy Client from Kirkland Office
“Nice, smart and they do a great job”
Dan Nordale
Happy Client from Mercer Island Office
“Thomas Dentistry makes going to the dentist something to look forward to.”
Robb Kristianson
Happy Client from Kirkland Office
“Very happy with the prompt service. I would highly recommend Thomas Dentistry!”
Ronald Folse
Happy Client from Kirkland Office
“I’vy been a patient with Dr Troy for fifteen years and have always been impressed with him and his entire staff. I am 86 years old and was hesitant to make my visit, but his whole staff used the best practices to insure the safety in the office. Unfortunately , I will be moving to California ima month or so and will have to find a new dentist , and hope that they will be as good as Dr Thomas and his staff.”
Adrestia Frontida
Happy Client from Mercer Island Office
“Friendly, casual, and comfortable environment, because of the team of knowledgeable and caring staff, starting with Molly at the front desk!😃”
Janelle Denson
Happy Client from Mercer Island Office
“I love coming here & I’m always greeted with smiles. It truly makes me feel great that the staff remembers my name & even though I visit every six months for my cleanings, our conversations pick up right where we left off. Marna, Rosie & Dr. Thomas are THEE BEST! I’d leave ten stars if I could.”
Jacqueline Roer
Happy Client from Mercer Island Office
“Five stars! Great Dentist and work he does and great staff.”
Alejandro
Happy Client from Mercer Island Office
“I can't recommend this practice enough. Everyone who works here is courteous, professional and extremely competent. 10/10”
Holly Yee
Happy Client from Kirkland Office
“Such a wonderful dentist's office! The staff is always welcoming, efficient, and they do a great job with my oral care. The other day I had a tooth brush bristle stuck in between two of my teeth and needed to come in for a minute visit. They got me in that day and were able to remove the bristle. It was such a relief! Going to the dentist can somethings be uncomfortable, but at Thomas Dentistry I always feel taken care of.”
Milo
Happy Client from Kirkland Office
“Great dentist! I came after Covid for my first checkup and cleaning, and ended up needing to have some childhood crowns replaced. During the process they were very thorough, even once getting a crown remade to have a perfect fit. One of those visits came in under the estimate. I appreciate the care they take in their practice. The staff are always nice and fun to talk to. Since my first series I’ve come here for over a year and have always had great experiences. Still need to floss more but the dentists and assistants are super nice about it! Also have great reminder system, and are very patient and thorough when working on insurance issues.”
Mark Detrow
Happy Client from Mercer Island Office
“Had such an amazing experience, and I would highly recommend coming here. I was incredibly thankful especially for how helpful and sweet Marna was. I typically do not like going to the dentist but she made me feel very comfortable and did a wonderful job! Will be back here soon!”
Linda Scott
Happy Client from Kirkland Office
“I visited Thomas Dentistry as a new patient on 9/9/21 and was impressed with their friendliness and professionalism. While there, multiple staff joined in to help resolve a personal issue, for which I was very appreciative. My husband and I will definitely schedule again with Thomas Dentistry Kirkland, and I’ll recommend them to family and friends.”
TJ Burke
Happy Client from Mercer Island Office
“Love the care, personnel and extra special treatment I receive with every visit. Best dentist I have ever had!”
Ankita Joshi
Happy Client from Kirkland Office
“Dr. Thomas is great. Very friendly and takes time to address your concerns. The staff is very helpful as well.”
linda
Happy Client from Kirkland Office
“Had my teeth cleaned today again by Rosie. She is an excellent Dental hygienist. Takes the time to answer all my questions and is very informative. Greatly appreciate it.”
Ernest Heassler
Happy Client from Kirkland Office
“Friendly, professional high quality dentistry. I made this observation two years ago and it is still valid. I can't imagine going elsewhere for dental care.”
Peter Christian
Happy Client from Mercer Island Office
“I did not have a dentist in the Seattle area and choose Thomas Dentistry because they were close and nearby. Boy, did I strike gold! I hadn't been to the dentist in a while and I needed some work done to get clearance for a other medical procedure. They were so great in getting me set up and expediting my treatments. Everyone was very professional and friendly. I can highly recommend them for your dental work.”
Susan Slagle
Happy Client from Kirkland Office
“I just recently transferred over to Thomas Dentistry and I’ve had two appointments so far, which I have had positive experiences with. The front desk is very friendly and accommodating, and they let you know about costs up front. I’ve had two different hygienists and they both have been good and thorough. I saw Dr. Jaswal both times and he has a very calm demeanor which puts you at ease. He also has a good sense of humor. Thomas Dentistry takes the unpleasantness out of going to the dentist!”
Elaina Sh
Happy Client from Kirkland Office
“Went to that office last year to get a crown on implant and Dr. Thomas did the ugliest crown possible. Shape and height looked completely different from natural tooth I had in that place before. He did not even try to fix it. This year my new dentist confirmed that the crown should have been done completely different but now Im stuck with this crown for a while because it will cost a ton to re-do it since that is a dental implant crown, not just a regular crown. I guess I missed the first red flag when they said they do root canals and extractions too. Of course, why even going to roots canals specialists and oral surgeons if You can get a “buffet of services” at Dr. Thomas! Also Molly at the front desk is the rudest receptionist I ve even seen, billing office could not get the numbers right and overcharged me for about $800 then refunded but can this office be more unprofessional and thirsty for money?!!”
We believe that dental care should be a collaborative process. Our team takes the time to understand your needs and concerns, ensuring that you’re an active participant in your own dental health. We offer flexible scheduling and transparent pricing, making your experience as convenient as possible.
When it comes to dental care, you deserve nothing but the best. At Thomas Dentistry, we combine state-of-the-art technology with a compassionate approach. Our team is committed to providing personalized care that meets your unique needs.
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Thomas Dentistry on Mercer Island has been serving the island community since 2007. Our dental office is located at 2955 80th Ave SE, Suite 105, in downtown Mercer Island, directly across from Bank of America with complimentary drive-up parking.
Dr. Troy Thomas is a Mercer Island resident and your neighbor dentist, bringing personalized care and community commitment to every patient visit. Our practice has served multiple generations of Mercer Island families.
Directions: Easily accessible via I-90 from both Seattle and Bellevue. Take the Island Crest Way exit and head south to downtown Mercer Island. We also serve patients from Bellevue, East Seattle, Newcastle, and the greater Eastside.