Our Doctors


Steven Kauftheil, DDS

Dr. Steven Kauftheil, DDS, is a caring and devoted prosthodontist at ToothDocs. Dr. Kauftheil is highly experienced in general dentistry and specialized fields such as restorative, cosmetic, and implant dentistry.

After earning his bachelor's degree from Stony Brook University in New York, Dr. Kauftheil received his medical doctorate from the School of Dental Medicine at Stony Brook. He went on to complete additional prosthetic dentistry training at the University of California, Los Angeles (UCLA).

Many patients choose a prosthodontist as a general dentist because of their rigorous education in general dentistry and their training in advanced dental techniques. Along with providing quality treatments, like the replacement and reconstruction of teeth, Dr. Kauftheil believes in giving each patient a level of personal commitment that makes them feel both comfortable and informed about their options.

Dr. Kauftheil is a member of the American Dental Association and the American College of Prosthodontics. Additionally, he regularly takes continuing education courses to offer his patients the latest in dental care, including cosmetic dentistry treatments, Invisalign®, and smile makeovers.


Nazli Diba, DDS

Dr. Nazli Diba, DDS, is a devoted pediatric dentist working with children and their families at ToothDocs. Dr. Diba sees patients from infancy through adolescence, working to provide the gentlest and kindest care.

Dr. Diba received her Doctor of Dental Surgery degree from the State University of New York at Stony Brook School of Dental Medicine. She went on to complete her residencies in general dentistry and pediatric dentistry at UCLA and Long Island Jewish Hospital. Dr. Diba has also received special training in the treatment of cleft lip and cleft palate and in special needs dentistry.

Going to the dentist can be stressful for a child, particularly when the territory is unknown. In working with her younger patients and their parents, Dr. Diba strives to create an office environment that is warm and welcoming. Her goal is to make any trip to the dentist easy.


Dong Kyu Lee, DDS

Raised in Korea and driven by a sense of duty, Dr. Dong Kyu Lee embarked on a unique path that has shaped his journey in dentistry. Before beginning his undergraduate studies at Texas A&M University, he proudly served in the U.S. Army, where he developed valuable skills in leadership, discipline, and teamwork.

After his military service, Dr. Lee pursued his passion for oral health by enrolling at Texas A&M University, where he completed his undergraduate studies. Inspired by his own experiences and a desire to make a difference, he set his sights on a career in dentistry.

Dr. Lee's unwavering determination led him to the Stony Brook School of Dental Medicine, where he immersed himself in a rigorous program. His dedication and commitment to excellence earned him his Doctor of Dental Surgery (D.D.S.) degree, equipping him with the knowledge and skills necessary to provide top-tier dental care.

Eager to expand his expertise, Dr. Lee furthered his education by completing a general practice residency program at New York Presbyterian Queens Hospital. This experience allowed him to refine his clinical skills, broaden his dental knowledge, and enhance his ability to handle complex cases with confidence and precision.

With a multicultural background and fluency in both English and Korean, Dr. Lee seamlessly connects with patients from various walks of life, creating a comfortable and inclusive environment in his practice. His diverse experiences have instilled in him a profound sense of empathy and a strong desire to cater to the individual needs of each patient.

Outside of his dental pursuits, Dr. Lee enjoys spending quality time with his beloved mini dachshund exploring NYC. His journey from military service to becoming a dentist reflects his deep-seated values of service, compassion, and a commitment to improving lives through exceptional oral healthcare.

Giving You A Reason To Smile


Dental Implants

All on 4 Implants


Cosmetic Dentistry


"I've been a patient of Dr. Kauftheil for the past seven years and I am long overdue sharing my experience with Tooth Docs. Dr.Kauftheil has restored my dental implants and I get compliments everyday on how beautiful my smile..."
Akasha Lola C
Oct 2023
"I am a retired NYC Employee and I visited ToothDocs for my dental needs. I am so thrilled with the work done by Dr. Kauftheil and the entire ToothDocs team. I've been to several dentist in my lifetime, however, I can honestly say..."
Oct 2023
"The best experience by far coming from FDNY EMS Abad."
Agustin Abad
Sep 2023
"I really recommend this place .Dr Kauftheil and his entire staff are the best very professional and gently they treat you like you are family, the office is very clean and organized . This is the place to go.!"
Irocania Mesa
Dec 2022
"Great staff very nice and professional!"
Tysha Johnston
Feb 2022


630 5th Avenue Suite 1815, New York, New York 10111

Phone: (212) 969-9490


  • MON - FRI9:00 am - 5:00 pm
  • SAT9:00 am - 4:00 pm
  • SUNClosed
Contact Us

1044 Northern Blvd., Suite 106, Roslyn, New York 11576

Phone: (516) 625-0088


  • MON9:00 am - 6:00 pm
  • TUE9:00 am - 5:00 pm
  • WED9:00 am - 6:00 pm
  • THU - FRI9:00 am - 5:00 pm
  • SAT - SUNClosed
Contact Us