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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.
Matt Wang
Happy Client from Mercer Island Office
“Dr. Jaswal is an absolute pleasure to work with!”
Ben Sharpe
Happy Client from Mercer Island Office
“They are awesome! Took care of my four kids today super convenient!”
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.”
Bill Sharpe
Happy Client from Mercer Island Office
“Thankful to have a dental team I can trust. Especially in 2021 Thanks all, Bill”
Barb Patterson
Happy Client from Mercer Island Office
“I needed a dentist close to home and they are close enough for me to walk. I've been twice now and both times had a great experience. Dr. Jaswal has a wonderful chair-side manner and super sense of humor.”
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!”
Marna Reams
Happy Client from Kirkland Office
“Cathy did an amazing job cleaning my teeth! She was informative on what is going on in my mouth! Looking forward to my next cleaning!”
Tyler D
Happy Client from Mercer Island Office
“I just started going here this year after bouncing around different dentist for years and have had a great experience each visit. I have had everything from cleaning, fillings, root canal, crown and they have all gone well. The office is nice, conveniently located and has off street parking. The entire staff is very friendly and helpful. Dr. Jaswal is excellent, takes his time not only with his work but explaining what you have going on, your options etc. Overall only good things to say about this place and definitely recommend it.”
D Enright
Happy Client from Kirkland Office
“Wonderful, welcoming staff always leaves me smiling!”
Ruth Combs
Happy Client from Kirkland Office
“Excellent dental services! Very caring and professional. Very attentive to my dental needs and concerns.❤️”
Brookstorm Honorblade
Happy Client from Mercer Island Office
“Friendly, comforting, professional, and painless. ;)”
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!!”
Dennis Ferrer
Happy Client from Kirkland Office
“Nice, smart and they do a great job”
Nelson Lopez
Happy Client from Mercer Island Office
“Very very exceptional service, from making the appointment all the way to check out.”
Doug Hartsock
Happy Client from Kirkland Office
“Forget those annual “Best of” awards; this is the best dental practice in Kirkland.”
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.”
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?!!”
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.”
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.”
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.