Our Team




Dr. Diana Deidan


Dr. Diana Deidan was born and raised in New York. She was chosen to be one of the first in a seven year B.S.-D.D.S. program offered by St. John’s University in conjunction with Columbia University’s School of Dental and Oral Surgery. A full scholarship was given to attend Columbia University and graduated Omicron Kappa Upsilon, and honorary dental society. She received certificates of Merit in both the American Society of Dentistry for Children and the Academy of General Dentistry. She then completed a two year general practice residency at Long Island Jewish Medical Center.

Dr. Deidan has been practicing in the city for 19 years. Her office is a general practice with an edge towards cosmetic dentistry. She is currently a premier provider for Invisalign and a member of the American Dental Association.

Dr. Deidan has three boys and her family currently resides in Scarsdale, New York. She enjoys running and has been in several marathons. She also enjoys skiing, interior design and traveling as part of her hobbies.




Dr. Stephanie Dumanian


Dr. Stephanie Dumanian received her Doctor of Dental Surgery from Columbia University.  She graduated cum laude from Barnard College with a Bachelor of Arts in Biology.  Additionally, she has completed advanced dental training at the Pankey Institute in Key Biscayne, Florida and the Spears Center in Scottsdale, Arizona.

Dr. Dumanian focuses her practice on aesthetics and function to ensure that her patients can maintain a healthy and harmonious smile.  She prides herself in providing lifelike veneers to her patients using smile design principles to predictably achieve flawless results.  Her master technicians are located in New York City and utilize advancements in photography, digital technology, and the highest quality ceramics to deliver aesthetic perfection.  She is also able to diagnose TMJ disorders early and to provide conservative and comfortable splint therapy.  The primary goal is to prevent the development of painful symptoms like jaw pain or difficulty chewing and harmful signs such as fractured teeth.

Dr. Dumanian prides herself in staying at the forefront of her field and is often traveling to collaborate with her peers on new techniques and advancements in dentistry.  She is a preferred provider for Invisalign, belongs to a Spears Study Club, and is a member of the New York Dental Forum.  She also serves as Treasurer on the Executive Board of Columbia Dental School’s Alumni Committee.

Dr. Dumanian is friendly and down to earth.  She lives locally in the West Village with her husband Nick, and loves chatting with her patients about travel and great restaurants – amongst her favorites are Marea, The Grill, Pasquale Jones,  and Le Coucou.