What patients are saying
Overall rating
5.00
Average wait time
4.81
Bedside manner
4.96
“Everyone in the office was really nice , clear communication , made my appointment so easy , I will definitely be back for future visits”
Shaymika J.September 4, 2025
“Doctor Hammer is the absolute best dentist around. Professional, sympathetic, very thorough . The office is beautiful and high tech and the staff is extremely friendly.”
James T.July 11, 2025
About Dr. Karen Hammer
*Please expect to pay the out-of-pocket fee if you are using an insurance plan that is out of network with the practice.*
Dr. Karen Hammer is a native New Yorker who graduated from Barnard College and earned her Doctor of Dental Surgery degree from the prestigious Columbia University College of Dental Medicine, being one of the first few females accepted into the program. She completed a General Practice Residency at Beth Israel Medical Center in NYC, where she furthered her education and perfected her patient care skills.
Dr. Hammer started her own practice in Massapequa in 1988 to deliver the utmost dentistry with no restrictions and has helped both adults and children maintain their oral health. Over the years, she has formed many strong ties with her patients, who have become like family to her. Dr. Hammer performs all phases of general dentistry with a special passion for crown and bridge, Invisalign, and restoring dental implants. She strives to maintain her patients' oral health and create beautiful smiles through state-of-the-art dental techniques while upholding the highest standards of ethics. Dr. Hammer is especially devoted to helping anxious dental patients achieve their treatment goals.
She joined the SimpliSmiles team at Farmingdale in June 2022, bringing her longtime family of patients with her. Through this merger, Dr. Hammer is now able to offer her lifelong patients a wider range of treatments, options, technology, and comfort to keep all their dental needs under one roof.
Dr. Hammer is a member of the ADA, AGD, and Nassau County Dental Society. With these memberships and her love for learning, she stays up to date with the latest techniques and procedures and takes pride in continuing education for herself and her patients.
Outside of dentistry, Dr. Hammer loves spending quality time with her children and two granddaughters. She also enjoys traveling, the arts, cooking, and gardening.
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In-network insurances
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Office location
Education and background
Practice names
Education and training
- Dental School - Columbia University, Doctor of Dental Surgery
- Beth Israel Medical Center, Residency in General Practice
Professional memberships
- American Dental Association
Languages spoken
- English
- Spanish
Provider's gender
Female
NPI number
1952472755
Patient reviews
All reviews have been submitted by patients after interacting with the practice.
Overall rating
5.00
Wait time
4.81
Bedside manner
4.96
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
29 reviews
Most relevant
excellent overall experience. staff was very engaging. office was clean, modern and comfortable
June 19, 2025Denyse H.Verified patient
Dr. Hammer is professional, thorough, caring and has been my dentist for 20+ years could not reccomend a better Dentist.
More than 1 year agoLW
Always a very welcoming office. Painless procedures and friendly staff. Dr Hammer is the best!
More than 1 year agoCG
Nice office, excellent staff, top professional care
June 19, 2025Denyse H.Verified patient
Excellent customer service and bedside manners. No issues or complaints.
More than 1 year agoAK
very kind staff, very efficient dentist and knowledgeable
November 8, 2023Initials hidden
Everyone in the office was really nice , clear communication , made my appointment so easy , I will definitely be back for future visits
September 4, 2025Shaymika J.Verified patient
Doctor Hammer is the absolute best dentist around. Professional, sympathetic, very thorough . The office is beautiful and high tech and the staff is extremely friendly.
July 11, 2025James T.Verified patient
Phenomenal team!! From scheduling the appointment, to check in, to seeing the hygienist, Stella, then Dr. Hammer and then checking out.... it was smooth and effortless. Everyone was kind, empathetic and extremely efficient!! What a wonderful experience!!! And who says that about going to the dentist!!!! HIGHLY RECOMMEND THEM!!!
March 4, 2024Jennifer M.Verified patient
Great experience. Fast easy pain free
October 30, 2023Vincent G.Verified patient
Receptionists were very friendly, the young woman who took x-rays was friendly and efficient and Dr. Hammer is a fine dentist and an excellent, straightforward communicator when it came to discussing what will need to be done to fix my teeth. I highly recommend Karen and SimpliSmiles.
May 18, 2023Scott A.Verified patient
Everyone was very nice.
More than 1 year agoDB
Less than 6 months agoInitials hidden
October 13, 2025Joanne P.Verified patient
Less than 1 year agoInitials hidden
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April 3, 2025Sophie D.Verified patient
March 27, 2025Neshe S.Verified patient
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April 11, 2024JULIO O.Verified patient
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March 21, 2024James C.Verified patient
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February 10, 2024Anthony I.Verified patient
January 18, 2024Jorge M.Verified patient
November 8, 2023Julissa A.Verified patient
September 28, 2023Ezechiel E.Verified patient
September 27, 2023Eric T.Verified patient
September 26, 2023Rachel L.Verified patient
How soon can I make an appointment with Dr. Karen Hammer?
Generally, Dr. Karen Hammer has appointments available on Zocdoc within 1 week. You can see Dr. Hammer's earliest availability on Zocdoc and make an appointment online.
Is Dr. Karen Hammer accepting new patients?
Dr. Karen Hammer generally accepts new patients on Zocdoc. You can see Dr. Hammer's earliest availability on Zocdoc and schedule an appointment online.
Does Dr. Karen Hammer accept my insurance?
Choose your insurance plan to verify if Dr. Hammer is in-network.
Can I make an appointment with Dr. Karen Hammer online?
Yes, you can make an appointment online with Dr. Hammer using Zocdoc. It’s simple, secure, and free.
What practice does Dr. Karen Hammer work with?
Dr. Karen Hammer works with SimpliSmiles.
Where is Dr. Karen Hammer's office located?
Dr. Karen Hammer's office is located at 297 Main St, Farmingdale, NY 11735.
What are common reasons for patients to see Dr. Karen Hammer?
Dr. Karen Hammer 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. Karen Hammer on their profile.
What languages does Dr. Karen Hammer speak?
Dr. Karen Hammer speaks English and Spanish.
How do patients rate Dr. Karen Hammer in reviews?
29 patients have reviewed Dr. Karen Hammer. The overall rating for this doctor is 5/5. They have a 4.96/5 rating for bedside manner and a 4.81/5 rating for wait time. You can read individual reviews and ratings on their profile.