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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.
William Kit
Happy Client from Kirkland Office
“Friendly, Highly Skilled and the Staff explain every detail of procedures needing to be done including Billing Pricing. I Highly recommend Thomas Dentistry!!”
sebastian gillbanks
Happy Client from Kirkland Office
“Very friendly staff and quality services”
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!😃”
Dan Nordale
Happy Client from Mercer Island Office
“Thomas Dentistry makes going to the dentist something to look forward to.”
B B
Happy Client from Mercer Island Office
“The best place!!! Great dentists!!! HIGHLY RECOMMENDED!!!”
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.”
Audra Saisslin
Happy Client from Mercer Island Office
“LOVE LOVE LOVE Doctor Thomas! Funny guy who always makes me feel relaxed and comfortable. Rosie is an excellent Dental hygienist! Love the whole staff and truly enjoy going to the dentist now. 11/10 would recommend.”
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.”
Ruth Combs
Happy Client from Kirkland Office
“Excellent dental services! Very caring and professional. Very attentive to my dental needs and concerns.❤️”
G Brook (Summit Seeker)
Happy Client from Mercer Island Office
“Professional, friendly and patient centered care. My first visit and I am thoroughly impressed. Great office culture and staff love what they do and it shows. Thank you.”
Robb Kristianson
Happy Client from Kirkland Office
“Very happy with the prompt service. I would highly recommend Thomas Dentistry!”
Edward Estrada
Happy Client from Mercer Island Office
“Efficient and kind staff! I went through a period of dental anxiety and my transition to this office was smooth and uneventful. They have decent hours, good parking, a great playlist, and refer to good endodontists. What’s not to love? ❤️”
Jordan Hansen
Happy Client from Kirkland Office
“Kathy D is fantastic and I definitely recommend her for routine cleaning. She is very thorough and cares for her patients. I greatly appreciate my visits.”
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?!!”
kirk packard
Happy Client from Kirkland Office
“I have had a ton of dentistry done and have been to alot of dentists. These folks have it together. Just had a molder crown replaced. Quick ,completely painless and my bite is perfect 1st try. Absolutely no adjusting and then they repaired a front tooth I had broken after quickly epoxy in molder. This was the 2nd appointment to install crown and I was only in the chair 20 min. Went like clockwork and looks awsum. Thanku. Only thing better would be free haha!”
Jacqueline Roer
Happy Client from Mercer Island Office
“Five stars! Great Dentist and work he does and great staff.”
Patrick Dion
Happy Client from Kirkland Office
“Best dentist I’ve ever been to. Not only are they prompt and quick but they walk you through your care clearly and explain the how’s and why’s. For once if feels like having an office that has a comprehensive plan for me rather than me checking a box every year. The hygienists are empowered to spend time with you and even book appointments with them right in the chair. Could not recommend more.”
Mary Berry
Happy Client from Kirkland Office
“Very incompetent doctor dr. Thomas is after money. Don't believe anything he is saying. Other doctors are all recent college graduates with no experience. Don't trust them. Get a second opinion or just go some place else get your teeth done.”
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.”
Jovany Lopez
Happy Client from Kirkland Office
“Highly recommended. Everyone is so friendly and it was a great experience. Great nurses and Dentist.”
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.