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William van Dyk, DDS & Raynato Castro, DDS

Put Your Best Smile Forward

Closed
(510) 236-1662WebsiteUpdated Aug 7, 2026

About William van Dyk, DDS & Raynato Castro, DDS

At Dr. van Dyk and Dr. Castro's office, we know that when you have confidence in your smile and the ability to eat the foods you enjoy, you lead a healthier life. Our team of compassionate professionals takes your care personally, providing comprehensive dental care tailored to your needs. In this fast-paced world, we strive to slow down and evaluate your current dental health in order to customize your treatment plan and fit it into your time and budget. We believe the best way to do this is to: • Provide the same quality of care to our patients as we would our own family • Offer our patients the state of the art in quality dentistry, equipment,  and materials • Work with only the best and the brightest technical staff in the industry to inspire innovation from within. • Exceed the level of service experienced by our patients at any prior dental office or clinic • Respond to the concerns of our patients so we can grow with them as their needs change over time • To involve ourselves in the community in meaningful ways to become more than a dental practice for our community

At Dr. van Dyk and Dr. Castro's office, we know that when you have confidence in your smile and the ability to eat the foods you enjoy, you lead a healthier life. Our team of compassionate professionals takes your care personally, providing comprehensive dental care tailored to your needs. In this fast-paced world, we strive to slow down and evaluate your current dental health in order to customize your treatment plan and fit it into your time and budget. We believe the best way to do this is to

Clinic Details

Best Known For

Pediatric Dentistry, Dental Implants, Porcelain Veneers, Cosmetic Dentistry, Dental Crowns

Business Hours

Monday
8:00 AM12:30 PM
Tuesday
8:30 AM3:00 PM
Wednesday
8:00 AM12:30 PM2:00 PM5:00 PM
Thursday
8:00 AM12:30 PM2:00 PM5:00 PM
Friday
7:00 AM11:30 AM12:00 PM2:00 PM
Saturday(Today)Closed
SundayClosed

Frequently Asked Questions

Where is William van Dyk, DDS & Raynato Castro, DDS located?
William van Dyk, DDS & Raynato Castro, DDS is a dental practice in San Pablo, California (ZIP 94806).
What services does William van Dyk, DDS & Raynato Castro, DDS offer?
It is a general dental practice offering preventive, restorative, and cosmetic care for patients of every age.
Does the practice treat children and adults?
Yes. The office sees patients of all ages for routine and ongoing dental care.
How often should I have a dental checkup?
Most dentists recommend a checkup and professional cleaning every six months, which helps catch problems while they are still small.
How do I book an appointment at William van Dyk, DDS & Raynato Castro, DDS?
Use this page to contact William van Dyk, DDS & Raynato Castro, DDS directly with a question or to request an appointment.

Location

Services Offered

Children / Pediatric Dentistry

Children's dentistry at William van Dyk, DDS & Raynato Castro, DDS delivers cleanings, exams, and cavity care in a way that suits young patients and builds healthy habits early.

Dental Implants

A dental implant rebuilds a missing tooth from the root up, restoring a natural look and a stable bite.

Veneers

Veneers reshape the visible surface of the teeth, correcting color, shape, and minor alignment for a refined smile.

Cosmetic Dentistry

Cosmetic treatment at William van Dyk, DDS & Raynato Castro, DDS addresses the color, shape, and balance of a smile, tailored to what each patient wants to change.

Dental Crowns

Dental crowns cover and protect compromised teeth, often after root canal treatment or a large filling.

Other services

Dental FillingsPeriodontal CareGeneral DentistryAffordable Dental Care

Reviews

36 reviews

Smyleee Rating reflects verified profile signals, reviews, and overall care quality.

See all reviews

Recent Reviews

A
A***3 months ago
M
M***10 months ago

I have been going to Dr. Alderfer for about 5 years now. I had my previous dentist my whole life and he retired. I have to drive a little, but it is well WORTH IT. Dr. Alderfer is very patient with me and she does excellent work. The whole staff works really hard too all the time. I am very grateful!!! —Matt K

A
A***11 months ago
L
L***1 year ago

DDS, Dr Castro! Very kind staff and reception team. Gentle care with a relaxed environment, this third floor nook is a wonderful place to get your dental work done! Nervous? It’s okay, they are really informative about what is happening, and take extra care to listen to your needs. A father and family man, Dr Castro has the classic dad jokes to help put me in a more comfortable mood. It’s totally worth the effort. Pro tip: paying out of pocket? Ask for the discount.

S
S***1 year ago

I enjoy going to the dentist because of the love that's in this office, I always laugh and feel comfortable no matter the procedure when I have an appointment. Castro is my dude!

L
L***1 year ago

This was my first time visiting Dr. Castro’s office, and I was really impressed. I experienced great customer service from the time I checked in until I checked out. The entire office exudes a family vibe. My appointment was with Dr. Van Dyke, but Dr. Castro came and introduced himself to me. He has a great personality and is very friendly. Starr was my hygienist (her name is appropriate for her). She’s amazing—very knowledgeable and patient. Dr. Van Dyke is a rock star. He answered all my questions and did not rush me. He gave me options but did not pressure me into making any rash decisions. He has an excellent bedside manner. It felt like we had known each other for a while. If you are looking for a great dentist with a family atmosphere, visit Dr. Castro’s office. This is a true and honest review. #dentist #familydentistry #greatservice #highlyrecommended

J
J***2 years ago

Dr Castro is the best dentist I’ve ever had! I’m almost fifty years old and I’ve had my fair share of dental work over the years. Dr. Casto is very gentle, he explains everything he does, and really goes the extra mile to make sure I’m comfortable. Dr Castro and his entire staff are very professional and pleasant to work with! I highly recommend Dr. Castro for any of your dental needs!

C
C***4 years ago

I feel so sad about writing this review, for a long time I had so much respect for this place, but never again will I waste my time/money here. The receptionist at this location is extremely rude! She has no costumer service skills and shuts you down completely without giving you a chance to speak at times. She does not help you find solutions to your problems and your left with a, "your going to have to figure it out yourself attitude". At least try to help people and make suggestions or give advice within your scope. She acts like she runs the place and when I asked for a product that I needed, just because I had not been seen their in a while she stated, "I'm going to go with NO". Then as soon as you give her the same attitude your receiving she gets offended as if she wasn't the one being rude to begin with. In my incident, instead of having me speak with Dr. Raynato or a different staff member, she hanged up on me. I called back and complained to a staff member and asked that I receive a call back from Dr. Raynato, but that never happened and that's okay. I see how they like to treat their clients (guess if your not a current client you get disregarded). I was able to find the product I needed through the help of the vendor, which stated that the product I wanted is not a prescription and that I should not have had such a hard time getting it. All this could have been avoided with having the face of the dentistry offering better customer service. Note: treat others how you would like to be treated.

Reviews are aggregated from public sources.

Photos (4)

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