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Honest about what you need. And what you don’t. Patients tell us they came in braced for the upsell, the surprise bill, the office that doesn’t remember their name. They walked out with a calm recommendation, the cost discussed before the chair tipped back, and a practice they’ve come back to ever since — right across from Bank of America since 2007.
If something we did isn’t right, we want to hear about it. We stand behind our work.
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.
Sarah Gielgens
Happy Client from Kirkland Office
“I have been a patient at Thomas dentistry for over 10 years and have always appreciated their open and friendly atmosphere, knowledgeable and helpful advice, use of new technology and methods, consistent and kind care. Dr. Thomas, Dr. Nguyen, and Dr. Jaswal have all demonstrated genuine care and interest in their patient’s lives, dental health and history, and other medical concerns. I admire their dedication to providing excellent solutions to dental problems, and patience with special issues. I would recommend this team to everyone!”
Jacqueline Roer
Happy Client from Mercer Island Office
“Five stars! Great Dentist and work he does and great staff.”
Brookstorm Honorblade
Happy Client from Mercer Island Office
“Friendly, comforting, professional, and painless. ;)”
David Hughes
Happy Client from Mercer Island Office
“Dr Thomas’ work has always been top notch for me and my family. The staff is genuine, friendly and easy to work with. Not changing dentist ever!”
Frahnz Dendy
Happy Client from Kirkland Office
“Just a cleaning today. Megan was very good, a professional who is very capable at what she does. Pleasure visiting this dental office.”
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!”
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.”
Jovany Lopez
Happy Client from Kirkland Office
“Highly recommended. Everyone is so friendly and it was a great experience. Great nurses and Dentist.”
Dan Nordale
Happy Client from Mercer Island Office
“Thomas Dentistry makes going to the dentist something to look forward to.”
Vanessa Hoffman
Happy Client from Kirkland Office
“This was my first dental visit and I must say they were definitely unorganized as their X-ray machine kept freezing the images delaying my appointment and they’re not put together. The manager Carmen told me I was going to have to pay a $70 balance. Which I completely agreed on no problem. I got a bill for $140 and was never told I had a $50 co-pay on top & they don’t use silver filling so I had to pay extra for a white filling. I was not told about any of these extra charges. The manager Carmen hung up on me over the phone without trying to fully explain everything and was very rude to me. I would not recommend this dentist because they are not truthful and they want you to pay double your bill so please be careful.”
Chelsey Swan
Happy Client from Kirkland Office
“I love Thomas Dentistry! Tracie is my usual hygienist. It might be strange to say, but I enjoy my teeth cleanings here. They are so easy and, as far as dental work goes, as comfortable as they can be.”
Robb Kristianson
Happy Client from Kirkland Office
“Very happy with the prompt service. I would highly recommend Thomas Dentistry!”
Faith Hutcherson
Happy Client from Kirkland Office
“Really enjoyed my experience here for a teeth whitening. The Kirkland location is great; it’s close to the freeway so it’s easy to find, and there was designated parking for patients. The staff (I’m talking from front desk to assistants to the doctor) were all very friendly and extremely efficient. I was talked through what they were doing so I felt at ease the entire time.”
Christy Shiers
Happy Client from Mercer Island Office
“Dr. Thomas is professional and knowledgeable. He is well suited for both kids and adults.”
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.”
Sue Dwyer
Happy Client from Kirkland Office
“Great experience with hygienist today. Thank you for being so kind and not judgemental. Looking forward to a long relationship with this dental office.”
Nelson Lopez
Happy Client from Mercer Island Office
“Very very exceptional service, from making the appointment all the way to check out.”
Matt Wang
Happy Client from Mercer Island Office
“Dr. Jaswal is an absolute pleasure to work with!”
D Enright
Happy Client from Kirkland Office
“Wonderful, welcoming staff always leaves me smiling!”
Henry Pang
Happy Client from Mercer Island Office
“The services are great and very professional.”
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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Copyright © 2023 Thomas Dentistry. All Rights Reserved
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.