Testimonials

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The Diablo Dental Group always appreciates feedback from our valued patients. To date, we’re thrilled to have collected 49 reviews with an average rating of 4.98 out of 5 stars. Please read what others are saying about The Diablo Dental Group below, and as always, we would love to collect your feedback.

I have been going to Diablo Dental Group for my Dentistry needs for longer than I can remember. Everyone on the team is professional, efficient, and friendly. This was my first appointment since Covid, and they have adjusted to conform to the highest health/safety standards, so I felt comfortable and contagion free while there. I highly recommend their services!

Diane P

You guys are simply the best!!!

TERI LIN N

Ann was excellent in her expertise and thoroughness in taking care of me for my dental cleaning!

Clyde B

Excellent

Leslie W

Very friendly & professional staff. Office is very clean and updated. I felt very safe going to my appointment during COVID-19. Dr. Koeltl is the BEST!!!!

Caroline P

I have been going to Diablo Dental Group for my Dentistry needs for longer than I can remember. Everyone on the team is professional, efficient, and friendly. This was my first appointment since Covid, and they have adjusted to conform to the highest health/safety standards, so I felt comfortable and contagion free while there. I highly recommend their services!

Diane P.

Always on-time, professional, excellent care! It’s actually fun to go to the dentist!

Suzanne O.

Absolutely the best dental and hygienist practice. Always feel like I am the #1 client when I visit. Felt super safe, clean and professional. Highly recommend them all the time.

Kris M.

I fly and drive considerable distances to see Dr. Koeltl…I trust him, he does superior work and I have every intention of staying with him as a patient. The dental hygienist I saw today was outstanding and I will ask specifically for her next time!

VIRGINA S.

Both doc and assistant have great “bed side manner” and expertise. The staff iis very efficient and responsive also, so glad my daughter recommended me to this office.

Jane C.

Excellent experience as always!

Mary W.

Safe, friendly, and comfortable visit.

J.C. M.

love the service

David D.

I have never understood dental care until I spoke to about my care with the Doc. His office, equipment and video capabilities were important for my dental education. I also learned about my bite guard and sleep problems. I needed a cleaning and found that was just the tip of the iceberg. I was very impressed and glad My daughter referred me. He is a definite find.

Lina C.

I appreciate the professionalism and concern for the overall health of the patients at this office. I am especially thankful for the time Dr. Koeltl takes to explain dental procedures and why they are necessary. I never fully understood how dental health can and will affect your overall health until I came to Dr. Koeltl and the Diablo Dental Group.

GARY N.

As always, Dr. Koeltl and Dr. Hahn and their staff go beyond to provide excellent, caring treatment in a genuinely fun atmosphere!

Clyde B.

First visit was a success. Jon was very easy to connect with, took interest in current needs and long term dental goals, and made the trip as enjoyable as possible 🙂 Would recommend.

Aleck F.

Dr. Koeltl and his staff were wonderful! They made me feel welcome right away as a new patient. Dr. Koeltl is very professional and informative.

STEPHANIE C.

No pain at all! Happy April Fool’s day!

Richard M.

Dr Hong did a great job as always. Would highly refer anyone to go see Diablo Dental.

Curtis S.

We love the Diablo Dental Group! Best dentist ever and staff! We moved out of state but still come back to see Dr. Koeltl and our hygienist Jamie!

COLTON A.

Dr. Hong and his assistants provide professional, caring service and are most pleasant even though going to the dentist is not fun. He’s been my dentist for many years, and I trust him to fix my teeth.

GREG H.

Great office, everyone is so friendly, like family. The skill level of all Dr. Hong’s group are of superior quality. Best dental office that we have been a part of in our careers.

BARBARA C.

Dr. Koetl will ALWAYS be our dental professional. He is professional, thorough and knows what he is doing. We are lifetime patients of Dr. Koetl

Carlos R.

Work was excellent.Very professonel.

Gary C.

Efficient, Thorough and Carring

Dinah T.

Everything was good.

Laura J.

Very caring and dedicated staff 🙂

ERIC K.

Awesome

Cindy W.

Professional and very welcoming. I am well taken care of

Rodolfo C.

If you are looking for a dentist practice that is professional, kind, and great at helping with any dental issues you may have-this is the place for you. They take meticulous care to make sure issues don’t escalate. I am in great hands with all the staff- the reception, the staff that works with insurance, the wonderful hygienists and technicians and especially the dentists.

Michelle F.

After searching many years for a dentist who listened to patients, was a considerate health care provider, and provided quality dentistry, I came upon Dr. Valerie Johnston. She is the best! Precise in her work and wonderfully friendly. I love her. I also appreciate Jan, her steadfast assistant, who always has an interesting story or two to share.

María O.

I have been a client/friend of the staff at Diablo Dental for over 25 years. They have always been honest, fair, transparent and helpful. I feel they are concerned about my comfort during any appointment and procedure. When I go to their office it is with confidence that they have my best interests in mind.

Carolyn B.

Excellent cleaning experience with Melissa

MICHELLE Z.

Clean office. Everyone is friendly and professional. They answer all of your questions and get the job done. I never feel rushed. Wouldn’t go anywhere else. For some reason, they’re always handing out floss on the way out the door. Like anyone uses that!

Joe O.

Awesome!

Melyssa M.

Always laughing with instruments in my mouth!

Leslie J.

Always a good experience to see Dr. Johnston. She’s a terrific dentist and sees my whole family.

Kelley T.

The Dental Hygienist did thorough cleaning of my teeth as always with efficient communication and putting all the effort to do her best.

ADIK M.

Efficient professional At all times comfortable

HOLLY B.

Have been visiting Dr. Koeltl for all dental requirements for the last 9-10 years. We do not live in this country but come from great distances to have Dr. Koeltl work on our teeth. He is extremely good at everything he does…excellent work and we have huge trust in him.

VIRGINA S.

Great visit. Everyone was awesome.

Jeffrey C.

I love going to see Dr Koeltl. Everyone at the practice is great, helpful, and kind.

CHRISTINA J.

Dr. Hong and Jan are the best. I’m generally scared of the dentist but they make it very comfortable for shots and crowns etc

JILL B.

Faculty’s!

GARY C.

Very thorough and knowledgeable. Is also easy to communicate with.

Judy H.

My hygienist Melony was wonderful. Gave me great advice and was very compassionate. Dr Hong is very thorough and thoughtful also.

Dr. Pamela W.

Everyone was very professional and I felt very comfortable

HOLLY B.

So professional and gentle! Best dentist office I’ve been to.

MICHELLE Z.

I love Dr Koeltl and staff. I’ve been a patient for over 30 years.

Venette F.

Nice people. Good work

Leslie B.
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