Finding a good dentist on Mercer Island starts with the numbers: the Dental.me directory tracks 30 dental practices across the island, 18 of them carrying a public rating that averages a strong 4.48 stars. Start with the highest-rated, review-backed offices listed below, confirm your insurance and specific treatment needs first, then book an in-person consultation.
Start with the island’s highest-rated practices
Mercer Island is a compact community, and its dental options are concentrated rather than sprawling — 30 practices serve the whole island, which means you can realistically shortlist a handful and visit them without leaving the 98040 area. Of those 30, 18 have accumulated enough public feedback to hold a Dental.me rating, and the top of that list clusters remarkably tightly. Eight practices sit at a perfect 5.0, and three more hold 4.9, so your first decision is less about avoiding a weak office and more about matching the right strong office to what you actually need. The ranked table below is sorted by rating, then by the number of reviews behind that rating.
| Practice | Rating | Reviews | Profile |
|---|---|---|---|
| Rebecca Zerngast | 5.0 | 143 | View profile |
| Mercer Island Dental — Invisalign and Sleep Apnea Dentist | 5.0 | 140 | View profile |
| Islander Orthodontics | 5.0 | 49 | View profile |
| Matthew T Streelman DDS MD PLLC | 4.9 | 229 | View profile |
| Brad Judy, DDS, PLLC | 4.9 | 100 | View profile |
| Dawn Bova | 4.9 | 98 | View profile |
Notice the split between rating and volume. Matthew T Streelman DDS MD PLLC carries the deepest feedback base on the island with 229 reviews at a 4.9 rating, while Rebecca Zerngast holds a perfect 5.0 across 143 reviews. Both are strong signals; a 4.9 built on 229 reviews and a 5.0 built on 143 are simply two different kinds of evidence, and neither is automatically the better fit for you.
What 4.48 stars across 18 rated offices tells you
The island’s 4.48 average is not a single blurry number — it is the sum of a distribution that leans heavily toward the top. Of the 18 rated practices, 11 sit at 4.8 stars or above, another 3 land in the 4.5–4.79 range, just 1 falls into 4.0–4.49, and 3 sit below 4.0. In practical terms, more than half of every rated dentist on Mercer Island clears the 4.8 bar, which is why your shortlist can be short: most of the rated field sits in the top band.
Those 3 practices below 4.0 are worth a second look rather than a reflex dismissal. A low score on a small number of reviews can shift quickly, and a practice may serve a specific niche well even when its overall average lags. Read the individual reviews on the profile before you decide, and weigh the rating against how many people actually left it.
How the Dental.me Score is earned
Every star rating you see on Mercer Island is the Google rating on file and feeds the Dental.me Score. The Score weighs a practice’s star rating, the volume of reviews behind that rating, and whether the office’s core details are confirmed, so an office cannot simply buy its way to the top of the island list. The only element that can be paid for anywhere in the directory is a Featured placement, which is labeled as such and does not change the underlying Score a practice has earned. When Islander Orthodontics holds a 5.0 across 49 reviews, that number reflects patient sentiment and confirmation signals, not a marketing budget.
This matters most when two practices look similar at a glance. A 5.0 with 140 reviews and a 4.9 with 100 reviews are both excellent, but the Score is built to give more weight to a rating backed by many reviews than to a few glowing ones, so use the review count alongside the star figure as your tie-breaker.
Website coverage and reaching an island office
Half of Mercer Island’s practices — 15 of the 30 — have a website URL on file in the directory. The other 15 have no website URL on file, which does not mean the office lacks a web presence; it means we don’t yet have a confirmed link to publish. For those practices, the fastest route is the phone number and address on the Dental.me profile, or a quick search by the exact practice name.
When you call, have two things ready: your insurance carrier and plan name, and a short description of what you need — a routine cleaning, a specific problem tooth, or a specialty consultation. That lets the front desk tell you quickly whether they are accepting new patients and whether they take your plan, which are the two questions that actually narrow a Mercer Island shortlist.
Specialty care: orthodontics and Invisalign on the island
Mercer Island is deep in clear-aligner and orthodontic care. Six practices are listed as orthodontists, and six are listed as Invisalign providers — a meaningful share of the island’s total. If straightening teeth is your reason for searching, you have real choice here rather than a single default option.
The listing named Mercer Island Dental — Invisalign and Sleep Apnea Dentist sits at a 5.0 across 140 reviews and signals both aligner and sleep-related work in its own name, while Islander Orthodontics is a dedicated orthodontic office also holding a 5.0. If you want a general dentist who also does aligners rather than a specialist, ask directly on the call whether the practice treats your case in-house or refers it out.
Reading the review counts behind the ratings
Across all rated practices, Mercer Island has accumulated 1,096 public reviews, and the six offices in the table above account for 759 of them. That concentration is useful: the practices most people can speak to are also the ones sitting at the top of the ratings, so the loudest evidence and the highest scores point the same direction. The chart below shows how those top-six review counts stack up.
Use volume as a confidence gauge, not a ranking on its own. Dawn Bova at 4.9 across 98 reviews and Brad Judy, DDS, PLLC at 4.9 across 100 are backed by enough visits that their ratings are unlikely to swing on a single new comment, which is exactly what you want in a long-term dental home.
Where Mercer Island fits on the Eastside
Mercer Island sits mid-lake between Seattle and the Eastside, so if your shortlist comes up short — a practice isn’t taking new patients, or your plan isn’t accepted — the surrounding directories are minutes away by bridge. It is worth widening the search into Bellevue just east across I-90, Seattle to the west, or Kirkland to the north, each of which carries its own set of rated practices. Start local on the island, where the ratings are dense and the driving is short, and treat the neighboring cities as your backup rather than your first stop.
To browse every rated and unrated office in one place, the Mercer Island dental directory lists all 30 practices with their current Scores, review counts, and contact details, so you can compare the full field before you pick up the phone.
Frequently asked questions
How many dentists are there on Mercer Island, WA?
The Dental.me directory tracks 30 dental practices on Mercer Island. Of those, 18 have accumulated enough public feedback to carry a Dental.me rating, and together they hold 1,096 reviews. The remaining practices are listed but not yet rated.
Which Mercer Island dental practice has the highest rating?
Eight practices share a perfect 5.0 rating, three of them on 49 reviews or more: Rebecca Zerngast with 143 reviews, Mercer Island Dental (Invisalign and Sleep Apnea Dentist) with 140, and Islander Orthodontics with 49. Because ratings tie, the review count behind each is a useful tie-breaker.
What is the average dentist rating on Mercer Island?
Across the 18 rated practices, the island averages 4.48 stars. That figure leans high because 11 of those 18 practices sit at 4.8 stars or above, with only 3 falling below 4.0, so the strongest options are densely clustered at the top.
Can I get Invisalign or braces on Mercer Island?
Yes. Six practices are listed as orthodontists and six as Invisalign providers, so the island has real specialty depth for a directory of 30 offices. Ask on your call whether a general dentist treats aligner cases in-house or refers them out.
Why do some Mercer Island practices not show a website?
Fifteen of the 30 practices have a website URL on file, and 15 do not. A missing URL is a gap in our records rather than a statement about the office itself; for those practices, use the phone number and address on the Dental.me profile to reach them.
Is the Dental.me Score something a practice can pay for?
No. The Score is earned from a practice’s star rating, review volume, and confirmation signals, and cannot be purchased. Only a clearly labeled Featured placement can be paid for, and it does not change the Score an office has earned.
Dental.me organizes dental directory data so patients can compare offices with confidence. Use each practice profile and its available website, map, and phone details for current appointment, payment, and care decisions.