What patients are saying
Overall rating
4.91
Average wait time
4.93
Bedside manner
4.95
“Great experience, Dr was very professional and knowledgeable about my issue. Will definitely go back to this office again.”
Farzaneh S.February 26, 2026
“Nice office, a smaller place but was quiet and clean. I was in and out quickly for my cleaning, Dr Belfour was polite and very professional. I was seen as soon as I walked into the lobby, and so was the other patient who came in right after me. It’s more of an old-school dental office environment which I personally like - Highly recommend Dr Belfour’s practice!”
Initials hiddenFebruary 12, 2026
About Dr. Balfour Kay
Dr. Balfour Kay, DDS specializes in general dentistry and currently practices in San Mateo, California.
He earned his Doctor of Dental Surgery degree from the University of the Pacific, College of Dental Medicine.
Dr. Kay provides friendly and professional general dental care with a kind touch to help patients maintain dental health, restore the health of their teeth, and prevent many dental issues.
** Dr. Kay accepts most insurances, but plans differ, and we will need to verify coverage type prior to the appointment. **
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In-network insurances
99% of patients have successfully booked with these insurances
Aetna
BlueCross BlueShield
Cigna
Delta Dental
Guardian
Metlife
UnitedHealthcare
Office location
Education and background
Practice names
Education and training
- Dental School - University of the Pacific, Doctor of Dental Surgery
Professional memberships
- American Dental Association
- California Dental Association
- San Mateo County Dental Society
Languages spoken
- English
Provider's gender
Male
NPI number
1699851816
Patient reviews
All reviews have been submitted by patients after interacting with the practice.
Overall rating
4.91
Wait time
4.93
Bedside manner
4.95
Your trust is our top concern, so providers can't pay to alter or remove reviews. We also don't publish reviews that contain any private patient health information. Learn more here
149 reviews
Most relevant
Great experience, Dr was very professional and knowledgeable about my issue. Will definitely go back to this office again.
February 26, 2026Farzaneh S.Verified patient
Dr. Kay has been my dentist more than 25 years. I always have a good experience at his office and always receive great care.
January 13, 2026Bryan R.Verified patient
Pleased that Dr called ahead to confirm my appointment.
Dr addressed my complaint of a problem tooth by taking X-rays.
August 14, 2022Linda M.Verified patient
Dr Kay was really nice and professional. He was careful and thorough when cleaning my teeth. He answered all my questions.
December 15, 2014Oliver S.Verified patient
Very kind and professional! Saw both my boyfriend and myself one right after the other. He was very diligent and thorough.
October 14, 2019Maddie G.Verified patient
Dr. Kay is a great professional. He was careful and thorough when cleaning my teeth. And thanks for fixing retainers.
More than 1 year agoInitials hidden
Dr. Kay explained everything that that was happening. He checked on me often to make sure I was okay.
September 16, 2022Adrienne R.Verified patient
Dr. Kay was very nice and always made sure I was comfortable.
July 3, 2025Initials hidden
Super friendly doc and staff! First time in a long time that I had a pain free dental cleaning.
More than 1 year agoShridhar R.Verified patient
Dr. Kay was very patient, compassionate and has good communication skills.
January 18, 2023Kurlene S.Verified patient
No wait. Good bedside manner. Thorough/efficient cleaning. Would recommend.
January 19, 2022Zach V.Verified patient
Great. Always on time. Very efficient. Conservative on treatment.
More than 1 year agoSF
Overall, a very pleasant experience. I highly recommend.
October 12, 2022Peter O.Verified patient
Dr. Kay made you feel at easerious and was very understanding.
More than 1 year agoLois D.Verified patient
Amazing dentist. Will definitely come back again.
December 8, 2014Brittany M.Verified patient
Great gentle dentist
February 16, 2026Caroline N.Verified patient
Nice office, a smaller place but was quiet and clean. I was in and out quickly for my cleaning, Dr Belfour was polite and very professional. I was seen as soon as I walked into the lobby, and so was the other patient who came in right after me. It’s more of an old-school dental office environment which I personally like - Highly recommend Dr Belfour’s practice!
February 12, 2026Initials hidden
The staff was extremely friendly and the doctor was extremely kind, took his time and answered all my questions. I would highly recommend!
Less than 1 year agoGabrielle D.Verified patient
I highly recommend Dr. Kay! I was a bit nervous for my appointment since it had been a bit since my last check up, and Dr. Kay was very kind and communicative.
Less than 1 year agoKeilani L.Verified patient
Amazing work, chill guy, in and out.
May 3, 2025Chris L.Verified patient
I came to Dr. Kay after a traumatic experience with another dentist, where I felt misdiagnosed and uncertain about my treatment options. From the moment I met Dr. Kay, he listened attentively, provided a wealth of knowledge, and offered a practical solution that made sense. His compassion, kindness, and deep expertise immediately put me at ease. I truly appreciate his patient-centered approach and the time he took to explain everything.
I will be returning as a regular patient—along with my family!
March 1, 2025Peter G.Verified patient
Kind office staff and gentle cleaning!
May 2, 2023Devon M.Verified patient
I'll be back!!!!
More than 1 year agoInitials hidden
I am very pleased with office visit.
May 18, 2022Hyungsoon B.Verified patient
Sweet old-fashioned attention. I'm old enough to remember when Drs' (not DDSs' of course) would visit our home for health appointments.
January 26, 2022Peggy R.Verified patient
Dr. Kay is amazing! I'm the worst kind of dental client but he didn't even think twice about it and has begun the process of walking me through fixing several teeth. Love the office vibe and staff!
January 10, 2022Joelle B.Verified patient
I was greeted upon entering the office. I did have to fill out a quick form but it was easy. I was then greeted by Dr. Kay and welcomed back by him. As this was an emergency dentist appointment, we talked and he took x-rays so we could come up with a plan to work on my teeth issues. Great experience!
More than 1 year agoInitials hidden
Highly recommend
October 25, 2021Maria L.Verified patient
Dr. Kay was a local, super-friendly, kind dentist. He took the time to explain what was going on and was gentle with my teeth! It felt like I had a new set of teeth when I left! He was the only guy there, and there was absolutely no wait.
May 10, 2021Jonathan P.Verified patient
Everything was great. Thank you Dr.Kay
August 18, 2020Anastasia D.Verified patient
Very thoughtful and detailed consultation
More than 1 year agoInitials hidden
Great visit with Dr Kay. Saw me right away and cleaning was a breeze. Was comfortable the entire time and appreciated he didn't try to push unneeded procedures.
September 9, 2019Eric N.Verified patient
Very nice experience! First off, I loved that I could schedule online with Zocdoc and then everything there after really exceeded my expectations. Front desk was exceptionally nice and the waiting room was cozy. I wasn’t there with my son but I did notice they had some items for kids to be entertained with, which I thought was a nice touch. Actual dental experience was A+, provided lots of helpful information, has a system where you can also see the state of your teeth while the assessment is going on, and provides exactly what you’d want from a dental cleaning. Would definitely use Dr Kay again. Great experience.
More than 1 year agoBrian R.Verified patient
Very polite and professional
December 28, 2018Aswasan J.Verified patient
Dr Kay is awesome. I am definitely going to be a regular patient of his and am looking fwd to my next visit. He was very professional and kind, knowledgable and did a great job for my first visit. Thank you!
July 6, 2016Initials hidden
I needed a new Dentist and went to Dr. Kay for a check up and cleaning. He was very nice and talked me through the check up and status of my teeth and gums. I highly recommend Dr. Kay.
More than 1 year agoZeny P.Verified patient
It was a very comfortable visit.
More than 1 year agoInitials hidden
Great experience from booking the appointment to arriving to the actual appointment. Moved to the area a year ago and finally found myself a great dentist!
December 30, 2014Initials hidden
Very good very thorough. Consultation and exam by Dentist followed by cleaning by hygienist. Both were nice wouldn't hesitate to go back next time.
December 9, 2014Bart D.Verified patient
Professional and thorough
July 9, 2014Aaron T.Verified patient
I think it gives accuracy diagnosis
August 27, 2014Jia W.Verified patient
Good... excellent service!
More than 1 year agoML
Excellent attention, personal time, knowledge. I travel up from Carmel, CA (2 1/2 hrs) due to the meticulous care and detail. The office offers care that supercedes the standards of today.
More than 1 year agoMD
Less than 1 month agoInitials hidden
March 6, 2026Nadia T.Verified patient
February 13, 2026Tina S.Verified patient
Less than 3 months agoInitials hidden
October 15, 2025Matbagan G.Verified patient
October 3, 2025Ruiqi W.Verified patient
Less than 1 year agoInitials hidden
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How soon can I make an appointment with Dr. Balfour Kay?
Generally, Dr. Balfour Kay has appointments available on Zocdoc within 1 week. You can see Dr. Kay's earliest availability on Zocdoc and make an appointment online.
Is Dr. Balfour Kay accepting new patients?
Dr. Balfour Kay generally accepts new patients on Zocdoc. You can see Dr. Kay's earliest availability on Zocdoc and schedule an appointment online.
Does Dr. Balfour Kay accept my insurance?
Choose your insurance plan to verify if Dr. Kay is in-network.
Can I make an appointment with Dr. Balfour Kay online?
Yes, you can make an appointment online with Dr. Kay using Zocdoc. It’s simple, secure, and free.
What practice does Dr. Balfour Kay work with?
Dr. Balfour Kay works with B Jeffrey Kay DDS.
Where is Dr. Balfour Kay's office located?
Dr. Balfour Kay's office is located at 255 N San Mateo Dr, San Mateo, CA 94401.
What are common reasons for patients to see Dr. Balfour Kay?
Dr. Balfour Kay frequently sees patients for Bridge, Dental Cleaning, Dental Consultation, Pediatric Dentist Consultation, and Root Canal. You can see other visit reasons for Dr. Balfour Kay on their profile.
What languages does Dr. Balfour Kay speak?
Dr. Balfour Kay speaks English.
How do patients rate Dr. Balfour Kay in reviews?
149 patients have reviewed Dr. Balfour Kay. The overall rating for this doctor is 4.91/5. They have a 4.95/5 rating for bedside manner and a 4.93/5 rating for wait time. You can read individual reviews and ratings on their profile.