John Koutsoyiannis, D.D.S., a leader in dentistry and oral care, opened his private practice, sohosmile, in January 2008.  Implementing the most current and innovative dental techniques, Dr. Koutsoyiannis is known for his attention to detail, professionalism and quality results.

A New York University College of Dentistry graduate, Dr. Koutsoyiannis has extensive training and experience in aesthetic/cosmetic and restorative dentistry, as well as providing a complete preventive program.  Patients may choose from a wide variety of services, from dental exams, cleanings, fillings and other general oral health procedures to implants, veneers, LED whitening and Invisalign.

He is one of a few elite dentists to provide custom-made, hand-crafted porcelain veneers.  Working personally with the dental lab’s master craftsman, Dr. Koutsoyiannis creates personalized, sliver thin veneers that appear completely natural and maximize each individual’s beauty.  His drive for dental perfection is one of the things that keeps his clients, who include award winning actors, international CEOs and world renowned models, smiling.

After graduating in 2000, Dr. Koutsoyiannis completed his residency at Jamaica Hospital where he was also honored with the position of Chief Resident.  He completed the Masters Level of Aesthetic Advantage at NYU – Rosenthal Institute for aesthetic porcelain veneers and continues his studies with courses and lectures in the many cutting-edge options available in dentistry today.

Dr. Koutsoyiannis is also a member of professional organizations including the American Academy of Cosmetic Dentistry and has been named one of America’s Top dentists from 2009 – 2016 by the Consumer’s Research Council of America.

“Dr. Koutsoyiannis has also been honored by Incisal Edge magazine as one of America’s Top 40 dentists under 40″.


Educational Profile
Adelphi University, N.Y. 1996 B.S.
NYU College of Dentistry, N.Y. 2000 D.D.S.
Jamaica Hospital Residency 2000 – 2001
Jamaica Hospital Chief Resident 2001 – 2002
NYU TMD Honors Program 1999 – 2000


Professional Organizations

American Academy of Cosmetic Dentistry
Academy of Osseointegration
Hellenic Dental Society

Soho Dentist