Mark A. DeNigris, DDS

Following a Tradition of Dental Excellence Since 1954

Dentist in Syosset

Have you been seeking a dentist with a longstanding reputation as an exceptional oral health care provider? At the office of Mark A. DeNigris DDS, our dentist has over 35 years of experience in the field, and has helped countless patients with the highest quality preventive, restorative, emergency, implant and cosmetic dental care. Highly skilled in a considerable range of dental services, Dr. Mark A. DeNigris is prepared to address the oral care needs of you and your whole family. With an enthusiasm for dentistry, and an energetic staff, new patients of all ages are made to feel most welcome at our comfortable office in Syosset. Providing the benefits of using the most advanced treatment technology and techniques, while providing highly personalized care, here at the office of Mark A. DeNigris DDS, technology and a distinctly human touch align for the best possible results.


After completing his undergraduate studies at Catholic University, Dr. DeNigris earned his dental degree from Georgetown University School of Dentistry in 1980, graduating at the head of his class. Maintaining an active membership in the American Dental Association, and Academy of General Dentistry, Dr. DeNigris has continued to remain current in the field with a passion for continuing education, having completed hundreds of hours of advanced training in all aspects of dentistry. As the second generation of dentists in his family, Dr. DeNigris carries on a family tradition of providing exceptional quality oral care, with a compassionate, patient-centered approach. When he’s not busy practicing dentistry or furthering his skills, Dr. DeNigris enjoys racing sailboats, and fishing—although not necessarily at the same time!


Proactive when it comes to your oral health, the office of Mark A. DeNigris emphasizes preventive oral care. As a proven method, effective at helping patients prevent the development of harmful dental conditions, your dentist would like to save you the need for extensive therapy if it can be avoided. Encouraging patients to stop in for semiannual exams and professional teeth cleanings, your dentist can keep a close watch over your oral health. With regular monitoring of the teeth, gums, and jaws, the likelihood of spotting dental conditions early on, when they’re simplest to treat, is greatly increased. Imparting his knowledge about dental hygiene and methods for care at home, Dr. DeNigris is an excellent teacher when it comes to brushing and flossing methods for patients at any age, or state of oral health. Complementing your at-home care with teeth cleanings, he will work with you to help prevent the onset of dental decay and gum disease, two of the most common dental ailments in the nation. For pediatric patients, Dr. DeNigris makes visiting the dentist fun, and takes additional measures to help ensure the continued oral health of your children.


At the office of Mark A. DeNigris DDS, we offer the latest restorative and cosmetic options for your teeth. Whether your teeth are damaged as a result of injury, decay, or root canal therapy, we provide the most cosmetically appealing fillings, crowns, and bridges for seamless results. Our crowns are completely customized, tailor made to the exact shade, shape and proportions of your natural teeth, and are extremely lifelike in appearance. Providing partial and full dentures, as well as dental implants for the replacement of missing teeth, you can trust that the most leading edge treatment solutions will be available. For eligible patients, dental implants provide an exceptional solution for replacing missing teeth. Unparalleled in their ability to replicate the form, function, and feel of natural teeth, dental implants also help to preserve your natural facial contours. Your dentist in Syosset also provides All-on-4, which provides permanent replacement for an entire dental arch through the use of a custom finalized bridge, secured by four strategically placed dental implants. All-on-4 is an excellent solution for replacing missing teeth, retaining the health benefits of dental implants and the cosmetic and functional benefits of fixed bridgework.


If you’ve been considering whitening your teeth, we offer professional grade whitening treatment, for one of the fastest and most effective options available. Many patients opt for the carefree convenience of an in-office treatment, personally administered by your Syosset dentist. For eligible patients at any age, we also offer orthodontic treatment with Invisalign. Aligning your crooked, spaced, or crowded teeth can make all the difference, not only in the appearance of your smile, but in your overall oral health as well.


Syosset is a warm and welcoming community in the northeastern section of the Town of Oyster Bay. Whether you’re here to enjoy the view of the North Shore of Long Island, enjoy our fine cuisine, or visit our rich historical society, you’re sure to find something you’ll love in Syosset.


If you live in Syosset, or in the nearby towns of Oyster Bay, Laurel Hollow, Plainview, or Huntington, consider making your next dental appointment at the office of Mark A. DeNigris DDS. Located on South Oyster Bay Road, between James Street and Edward Avenue, we’re easily accessible by public transportation or by car, with parking available in our lot. We look forward to providing you and your loved ones with the best that modern dentistry has to offer!


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Office Location
34 South Oyster Bay Road
Syosset, NY 11791
New Patients: (516) 342-5027
Existing Patients: (516) 921-3290

Office Hours





Monday: 9:00am - 1:00pm
2:00pm - 6:00pm
Tuesday: 9:00am - 1:00pm
2:00pm - 6:00pm
Wednesday: Closed
Thursday: 9:00am - 1:00pm
2:00pm - 6:00pm
Friday: Closed
Saturday: 9:00am - 1:00pm

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