Thomas Kiefer & Staff
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Cosmetic Dentistry If you would like to enhance the appearance of your smile, we are eager to help. We offer a wide array of cosmetic services to help you have the smile you deserve! General Dentistry Our team is devoted to help your family reach and keep ideal dental health. Regardless of your needs, we are here to help.

Restorative Dentistry If you are missing a tooth or several teeth, we have the answer for you. With the latest in dental implants and restorative dentistry, we are eager to help you have your ideal, complete smile. Our talented dentist, Dr. Thomas M. Kiefer, is proud to have offered comprehensive care to all of our friends in Marathon, Florida, and to the neighboring communities of Key West and Key Largo, Florida, for more than 10 years.
Services
Dr. Thomas Kiefer graduated from the University of Pennsylvania School of Dental Medicine in 1983 after earning his biology of science degree from Syracuse University in 1979. Since graduating from dental school, Dr. Kiefer has regularly taken courses to remain current with the newest dental technologies.
Our friendly team is devoted to offering you and your loved ones comprehensive dental care. Regardless of whether you need extensive restorative care or are interested in improving your smile through cosmetic dentistry, we are sure to offer the care that is right for you. Our team is devoted to offering you the most pleasant dental experience possible.
If you would like to enhance the appearance of your smile, Dr. Thomas M. Kiefer may recommend one of the many cosmetic services we offer. Cosmetic dentistry is a term that is used to classify many dental services that are used to enhance the appearance of your smile. We work hard to give you the most enjoyable care possible and recommend that you schedule a consultation with our dentist if you are unhappy with any aspect of your smile.
Dental veneers are thin shells designed to cover imperfections and give you the beautiful smile you have always wanted. With proper care, the transformation offered by dental veneers can last for more than a decade. Generally, dental veneers can be completed in just two visits. Dental veneers are frequently made from either resin (a mixture of glass and plastic) or porcelain.
General and family dentistry is a term that is applied to several dental treatments that are designed to help patients achieve and establish sound oral health. Our friendly dentist, Dr. Thomas M. Kiefer, is devoted to helping you have healthy teeth for a lifetime.

Regardless of whether you need to schedule a dental appointment for your child, need a routine teeth cleaning, or are in need of a more complex restorative procedure, we invite you to contact us today to see if one of the services we provide is right for you.Our team works hard to give you and your family the most enjoyable dental service possible and strives to help you prevent potential dental complications.
Reviews (10)
Matt Beardsley
Matt Beardsley
Dec 27, 2021
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On vacation in the Florida Keys and broke a tooth Christmas Day. Sunday pain was increasing. Monday looked up dentists in the area and saw Thomas Kiefer DDS. was close by. Called Monday and left a message, they were closed. Tuesday at 8:58 they called back and could get me in at 1:20pm. They called back and asked if I could come in at noon. Tooth removed, removal was not easy, and I was out of the office by 1pm. Thanks to all.
Patricia Houston
Patricia Houston
Dec 03, 2021
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Great place. Got in and out guick. Really liked the staff, and the doc. Would highly recommend them again!!
Robin Kuhn
Robin Kuhn
Nov 25, 2021
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I was total impressed by the thoroughness of the hygienist! Never in all my 60 years with teeth have I had such a great cleaning. I have gone to periodontists that have done a lesser job . Dr. Kiefer is charming and professional! Bravo to the whole staff
And the environment is impeccable!
Angela Mcdonald
Angela Mcdonald
Sep 28, 2021
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I’ve been needing a good dentist and boy I found the best! In the keys it’s hard to find. Dr. Kiefer was exceptionally caring and kind. I even received a phone call from him checking in on me. That is rare these days! Thanks Doc and staff!
Brooks Garner
Brooks Garner
Sep 20, 2021
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Dr. Kiefer is the kindest gentleman I can remember meeting. Truly. We were down on a long weekend and had a bit of an emergency with our little one, who chipped a tooth. As I understand, he generally does not see pediatric patients but as we were in a pinch, he was able to slip us in to take a look and offer not only peace of mind that she was okay and that we could wait a bit to get it repaired at our hometown dentist, but we left feeling very cared for. If we lived here, I would hope he’d be our dentist and think everyone who sees him is quite lucky. Thank you!
Kimberly F. Schmidt
Kimberly F. Schmidt
Sep 15, 2021
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Words can’t express how caring and committed they are to us patients. Dr.Kiefer has a real soul as he listens and hears his patients in making sure he meets our needs. His crew mimic him in a beautiful family way! You can’t help but Love Dr. Kiefer and his Crew!!
Sincerely,
Kimi
Marycay Trace
Marycay Trace
Aug 24, 2021
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Dr. Kiefer just pulled my tooth. First time since I was a kid getting prepped for braces. I have a low threshold for pain in my mouth and was very anxious remembering all the times In the past I heard the tooth cracking and how painful it was when my teeth were removed. He was amazingly gentle beginning with the pain blocker. I barely felt the needle. Then his extraction method was so different from the old yanking I remember I did not know the tooth was out until he started stitching me up. He was very patient and kind the whole process. Highly recommend this man!
Cmt T.
Cmt T.
Jul 24, 2021
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Dr. Keifer and his staff are excellent. Ashley is a superb hygienist and dental assistant. Dr. Keifer is experienced and keeps up with the best technology. They do an excellent job explaining insurance options as well. The Keys is lucky to have a thorough dental office that is friendly and knowledgeable.
Dave Huddle
Dave Huddle
Jun 14, 2021
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These folks are great! Ever since I've come to the keys looking for a good Dentist. I asked around and the locals all agreed. Dr Kiefer and Lindsey are the bomb!! No pain fillings and cleanings that are therapeutically. Just pure pleasure at the dentist...All very professional and they plan your treatment. Nice job team
Robin McNulty
Robin McNulty
Apr 03, 2021
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Went in with broken crown and tooth. Expecting tooth to be pulled and implant process to start. Dr K recommended root canal, post and cap when I get back home to Ohio next month. He is the most honest, fun Dentist ever!!!! Love all his staff. Second time there as snowbird and cannot recommend all of them enough!
Robin