What patients are saying
Overall rating
4.86
Average wait time
4.81
Bedside manner
4.85
“The wait time wasn't long, the staff was amazing with it being my first time there and the doctor seemed very knowledgeable. Even tho I didn't see the doctor I booked I saw a different one she was efficient.”
Nancy V.August 26, 2025
“The service that my child and I received was superb. He truly is the best Dentist for the best job phenomenal work. his staff was extremely welcoming and made us feel very comfortable. And listen closely to each of our concerns and devise the plan that will help us in the future. I highly recommend this dentist office.”
Teiyah S.August 23, 2024
About Dr. Gregory Seiden
**We DO NOT participate with 32-BJ, DC-37, FIDELIS, HEALTHFIRST
Dr. Gregory Seiden is a dentist in Levittown, NY who uses state-of-the-art dental materials and treatments with a gentle, caring touch. He enjoys getting to know each patient as a person in order to practice health-centered, caring dentistry. Dr. Seiden enjoys educating patients before treatments in addition to staying ahead of the technology curve.
In 1985, he received his Doctorate of Dental Surgery degree from NYU. Dr. Seiden completed his residency in 1986 at the Northport (Long Island) VA Medical Center and the Long Island Jewish Medical Center when he was also a clinical assistant professor at Stony Brook.
Currently, Dr. Seiden enjoys continuing education courses regarding aesthetic dentistry, Invisalign®, and implant dentistry. He is an active member of Nassau County Dental Society, the American Dental Association, and New York State Dental Association.
Dr. Seiden welcomes you to Seiden Dental Excellence!
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In-network insurances
99% of patients have successfully booked with these insurances
Aetna
Cigna
Delta Dental
Guardian
UnitedHealthcare
Office location
Education and background
Practice names
Education and training
- Dental School - New York University, Doctor of Dental Surgery
- Long Island Jewish Medical Center (Residency)
- Northport Veterans Affairs Medical Center (Residency)
Professional memberships
- American Dental Association
- Nassau County Dental Society
- New York State Dental Association
Languages spoken
- English
Provider's gender
Male
NPI number
1144345976
Patient reviews
All reviews have been submitted by patients after interacting with the practice.
Overall rating
4.86
Wait time
4.81
Bedside manner
4.85
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
58 reviews
Most relevant
Great! Dr. Seiden and staff make you feel very comfortable and put you at ease, explains everything that they are doing.
More than 1 year agoKS
Excellent visit as usual. Dr. Seiden takes a personal interest in every patient that goes there. It's a rare find.
July 7, 2016William L.Verified patient
Doc and his staff very very professional and well informed. Pleasant surprise for sure
May 25, 2017Gregory S.Verified patient
The entire family has been using Dr. Seiden for years. He and his staff are tops!!
May 28, 2016Daryl F.Verified patient
I've been a patient fron his start, and would highly recommend his practice!
August 31, 2016Gary C.Verified patient
Everybody was so great. I definitely will be back. ?
June 12, 2024Justin B.Verified patient
they didn't rush me out the door and resolved my problem.
July 21, 2023Initials hidden
Very diligent dentist. Highly qualified. Excellent assistant.
More than 1 year agoInitials hidden
Very happy with it. I would recommend this office to anyone.
More than 1 year agoJW
Dr. Seiden always does a great job and he's tops in my book!
April 24, 2018Tom C.Verified patient
No wait, clean office, great staff, and painless dentistry.
More than 1 year agoSB
The wait time wasn't long, the staff was amazing with it being my first time there and the doctor seemed very knowledgeable. Even tho I didn't see the doctor I booked I saw a different one she was efficient.
August 26, 2025Nancy V.Verified patient
Definitely a friendly office
New i was coming
November 22, 2024Greg C.Verified patient
Very professional, with a great bedside manner !
October 1, 2024Richard S.Verified patient
The service that my child and I received was superb. He truly is the best Dentist for the best job phenomenal work. his staff was extremely welcoming and made us feel very comfortable. And listen closely to each of our concerns and devise the plan that will help us in the future. I highly recommend this dentist office.
August 23, 2024Teiyah S.Verified patient
I could tell they were very professional and knowledgeable. They seem to really care and are willing to work with me for payments.
June 23, 2023Lorri S.Verified patient
Dr. Seiden was amazing ! I went in for a wisdom tooth pain and a regular check up. He was able to referred me to a great Oral surgeon group, he made sure I was taken care of all the step of the way. The staff at his office are friendly and very polite. He is now my dentist moving forward.
February 1, 2023Dennisse C.Verified patient
Dr. SEIDEN was professional, very astute re diagnosing my dental problem, he provided an effective intervention, was courteous, and kept me informed throughout the process.
February 5, 2019Marsha D.Verified patient
Dr. Gregory Seiden is the best!! :-)
May 11, 2018Thomas C.Verified patient
Dr. Seiden is a very professional dentist and is always courteous and explains everything in lay mans terms. His office staff is also a pleasure to deal with. Thank you. Steve T.
December 18, 2017Steve N T.Verified patient
Dr. Seiden is an excellent dentist. Going to the dentist is something I don't look forward to but Dr. Seiden has a comforting manner and practices painless dentistry. His staff is excellent and they all are very personable and professional. I would highly recommend Dr. Seiden.
August 15, 2017Stu B.Verified patient
Dr. Seiden accommodated me right away as I had tooth pain. Due to the complexity of my situation he referred me to a specialist. Not only did he refer me but the office called a few specialist and got me in to one right away the same day. Dr. Seiden was so helpful and had a great bedside manner. The office was clean. This was my first time in the office and the office staff and Dr. Seiden went above and beyond to help me. I defiantly recommend him!
August 3, 2017Initials hidden
Dr. Seiden and his staff are extremely competent. They are concerned about each of their patients and are very kind when they take care of your dental needs. I highly recommend their office.
September 29, 2016Lucy R.Verified patient
My family and I have been seeing Dr. Seidan for over 15 years and we have never had a bad experience. His staff is very friendly, welcoming and helpful.
August 17, 2016Melissa M.Verified patient
I think that Dr. Seiden is a brilliant, creative and definitely the best dentist I have ever been to. He is exemplary in every way.
More than 1 year agoIE
Wonderful experience from front desk to Dr. S.
More than 1 year agoVD
WONDERFUL!!!
More than 1 year agoTC
Dr. Seiden is wonderful! I live in Florida and whenever I am in NY I make my dentist appointment! Love the staff, clean & no waiting! Definitely recommend you see Dr. S.
More than 1 year agoEL
Less than 6 months agoInitials hidden
December 11, 2025sisira M.Verified patient
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April 28, 2025Nicole C.Verified patient
April 17, 2025Patrick M.Verified patient
March 14, 2025Jessica L.Verified patient
March 10, 2025Jonathan S.Verified patient
February 3, 2025Linton D.Verified patient
November 26, 2024Iqra A.Verified patient
October 16, 2024richard Z.Verified patient
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August 26, 2024Dillon C.Verified patient
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June 13, 2024Rob W.Verified patient
June 4, 2024Patrick A.Verified patient
February 20, 2024Anna V.Verified patient
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December 1, 2023Roseann B.Verified patient
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How soon can I make an appointment with Dr. Gregory Seiden?
Generally, Dr. Gregory Seiden has appointments available on Zocdoc within 1 week. You can see Dr. Seiden's earliest availability on Zocdoc and make an appointment online.
Is Dr. Gregory Seiden accepting new patients?
Dr. Gregory Seiden generally accepts new patients on Zocdoc. You can see Dr. Seiden's earliest availability on Zocdoc and schedule an appointment online.
Does Dr. Gregory Seiden accept my insurance?
Choose your insurance plan to verify if Dr. Seiden is in-network.
Can I make an appointment with Dr. Gregory Seiden online?
Yes, you can make an appointment online with Dr. Seiden using Zocdoc. It’s simple, secure, and free.
What practice does Dr. Gregory Seiden work with?
Dr. Gregory Seiden works with Seiden Dental Excellence.
Where is Dr. Gregory Seiden's office located?
Dr. Gregory Seiden's office is located at 21 Division Ave, Levittown, NY 11756.
What are common reasons for patients to see Dr. Gregory Seiden?
Dr. Gregory Seiden frequently sees patients for Bridge, Dental Cleaning, Dental Consultation, New Patient Dental Exam (Adult), and Root Canal. You can see other visit reasons for Dr. Gregory Seiden on their profile.
What languages does Dr. Gregory Seiden speak?
Dr. Gregory Seiden speaks English.
How do patients rate Dr. Gregory Seiden in reviews?
58 patients have reviewed Dr. Gregory Seiden. The overall rating for this doctor is 4.86/5. They have a 4.85/5 rating for bedside manner and a 4.81/5 rating for wait time. You can read individual reviews and ratings on their profile.