Book an Appointment
Qualifications and Experience
Awards and Publications
Dr. William Costello III, DMD is a graduate of Temple University School of Dentistry. During the graduation ceremony, Dr Costello was the recipient of the Auerbach Memorial Award given to the senior student who showed strong moral character, clinical and academic excellence. Since this time, Dr Costello has practiced in Center City and New Jersey. He has voted part of Top Dentists of South Jersey by South Jersey Magazine for 2011 and 2012 and Top Dentists of Philadelphia in 2014. Dr. Costello takes great pride in offering patients high quality care and a comfortable dental experience. When not working, he enjoys spending time with his family and surfing as much as possible.
Verified Patient Reviews
My family and I have been to Dentists on Washington several times since my first appointment with Dr. Costello in December. He and his wife are both excellent dentists - gentle and quick but thorough. Their office is fully equipped with state of the art exam rooms and panoramic x-ray machine. Super clean, pleasant office and great staff across the board. They work with you to figure out how to tackle your dental plan if you need several fillings, a crown etc - to space out the visits and keep it affordable. We wouldn't go anywhere else!
This office is very clean, the staff are super friendly and the dentists are awesome!
Very professional, clean, courteous. I'm not a dental price wiz, but even with my dental insurance his prices out of my pocket are still high. I will be shopping around before I get any work done. If money isn't an issue for you I would highly recommend.
Both Dr. Costello and Dr. Ngo were nice and professional. They gave straightforward feedbacks on my condition.
I would highly recommend Dr. Costello. He was friendly, thorough, and listened to all my concerns. The office staff was great too. They came up with a treatment plan for me which clearly showed how much my insurance would cover, and how much I would have to pay. Then they went over it with me, gave me a few options, and even a small discount. Definitely one of my better dental office experiences! They even have tablets attached to the light fixture so you can watch Netflix while you get your teeth cleaned. Very helpful if you're the anxious type.
I went to visit Dr. Ngo for an initial consultation. I told her my history of tooth grinding - that I had worn off a lot of enamel on my teeth (which left tiny brown spots on molars that sometimes looked like cavities) and need a new mouthguard to prevent grind. I also shared that I may need to get a filling fixed on my molar. I did not feel as though she listened to this history and instead told me I had approximately 5 cavities, needed a root canal, and needed to get my wisdom tooth pulled. I went to my former dentist to get a second opinion. He shared that I only needed a filling repaired and encouraged me not to get my wisdom tooth pulled.
Amazing doctor (kind and thorough, quick to respond via email) and fantastic front desk that tells you exactly your cost breakdown based on your insurance!
This was my first time visiting the office, I can't wait to start my journey with my new dental family!! Everyone introduced themselves even the other dentist that worked there. Very clean and friendly environment.
Great staff and atmosphere!
Great doctor and didn't have to wait long.
This was my first time seeing Dr. Costello and he was fantastic. Short wait and one of the best cleanings I've had in years. I just moved to Philly and thankful for using Zocdoc to find a great dentist. My wife will be scheduling her appointment next.
I felt welcomed from the moment I walked in the door. Everyone was friendly and prossional. Dr. Costello was thorough with my exam and gentle with my cleaning. I'm happy to say that I have found the right dentist for me!
This was the first time I had to wait, but it was only because the receptionist was calling my insurance company to confirm my coverage before my appointment! Great, professional, impeccable!
Both doctors are great! The office is clean! And both of these doctors take their time out to explain everything to you. They are also very accommodating with their scheduling.
It actually ended up being the partner Dr. which was fine. She was very good and explain everything. Everyone was very professional.
Dr. Costello and all of his staff were extremely helpful and went above and beyond to welcome me and make me feel comfortable. I would absolutely recommend him to anyone!
I have been to a lot of dentist but Dr William Costello and his practice was great all around.
Dr. Costello is 5 stars all the way. The staff is knowledgeable and friendly as well. I would recommend everyone to his office. I now love going to the dentist!
Very clean and modern office. Friendly staff. Dr Ngo even came over and introduced herself, despite my appointment being with Dr Costello. He was very professional and explained everything he did during the cleaning. Overall I highly recommend this office and Dr Costello and Dr Ngo.
This was by far the best experience at the dentist I have ever had. Dr. Costello and his wife were very accommodating, they knew their stuff, and they were very easy to talk to. I highly reccommend Dr. Costello's office.
Beautiful office, great staff, great visit!
Dr. Costello, Nancy, Tiffany and all Staff were excellent! Very courteous, hospitable, & polite! I was in pain, they treated me very quickly & gently! My Root Canal was a Success! Very comfortable & clean office, love the wall fountain! Thank you, Dr. Costello!
He is very kind and professional and will listen to his patients concerns and acknowledge them.
Great experience. Warm friendly office. Very knowledgable dentist who took the time to explain everything. Easy going, laid back yet very professional
I love Dr. Costello. I have NEVER been a fan of the dentist, but I actually enjoy going to Dr. Costello. He makes me think that maybe I don't hate going to the dentist, I've just disliked all my other dentists before him!
They were very thorough, did a great job of explaining things to me, and did a good job all around.
He's very nice and makes you feel comfortable. Everyone there was welcoming and the office is super clean!
Awesome- everyone was super friendly and helpful. I was seen right away, and Dr. Costello was very thorough and talked through everything he was doing. I had just a cleaning and exam, and was in and out in about 30 minutes!
Both he and dr ygo are fabulous , I would highly recommend them to anyone who ask . The office personal is also so very nice, office is clean and state of the art .. Experience was just overall fantastic
Excellent, received creditable information about the procedures, friendly staff ,and a clean environment.
It was a great experience.
Great first visit. Very professional and modern offices. Friendly staff. Highly recommended.
Very informative and gentle. Made it very easy. Clean office and great staff. Eco friendly too.
Great visit. Great office. New equipment. Comfortable setting. Polite Staff. Happy to have found a new dentist...
Very helpful I look forward to seeing them again I highly recommend them to everybody
Awesome office, professionalism, staff, and total service!
Dr. Costello was professional and thorough. As someone who hates going to the dentist, he made sure that I was comfortable and informed the whole time. I was very impressed with the friendliness and attentiveness of his staff. I am very glad I found his practice!
Most professional in every aspect All state of the art office will be seeing the again shortly.