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Meet Our Team

Dr. Dorn

Dr. Mark Dorn

Dr. Mark Dorn was born in Brooklyn, NY and raised in Cedarhurst,NY. He graduated from the University of Cinncinati with a Bachelor’s in Science Biology and pursued a career in General Dentistry at NYU. After graduating with his Doctorate in Dental Surgery in 1977.

Dr. Mark Dorn has professionally had the opportunity to run a successful practice for 42 years. He takes an active interest in his patients, not only providing them with outstanding care, but getting to know them on a personal level. His passion is Restorative Dentistry. He continues to enhance by constantly taking continuing education to keep up with todays newest technologies in Dentistry.

Dr. Dorn has been married to his soul-mate for 45 years, they have been blessed with 3 children and 5 grandchildren. He enjoys spending time with his family and traveling in his free time.

Dr. Brownstein

Dr. William Brownstein

Dr Brownstein has been in practice for almost 30 yrs and has been located on the North Shore in Manhasset for this time. He was born on Long Islandand resides there ever since. He earned his B.A. degree from Suny Binghamton in Biochemistry in 1982. He graduated NYU School of Dentistry in 1986 where he earned his D.D.S. degree. He did his general practice residency at Long Island Jewish Medical Center and then did his specialty training at Nassau County Medical Center and earned his degree in Endodontics in 1989. He has published many articles in the field of Endodontics and was one of the first to utilize Digital Radiography in New York. He has appeared on Cablevision to discuss this topic. Dr Brownstein has one son, Harris and enjoys sports, weight training and automobiles.

Dr. Andrew J. Leder

Andrew J. Leder, DDS, is a periodontist at Gramercy Dental Center. Dr. Leder takes a great amount of pride and satisfaction in helping his New York City patients prevent disease and improve the state of their oral health. Dr. Leder has been highly trained to provide his patients with the most current, innovative surgical and non-surgical techniques that modern dentistry has to offer. Dr. Leder completed his undergraduate studies at the State University of New York at Albany and was admitted into the Alpha Kappa Delta Honor Society in 1987. He then completed dental school at the State University of New York at Stony Brook School of Dental Medicine, where he graduated with his Doctorate of Dental Surgery. While at Stony Brook, Dr. Leder won the John Oppie McCall Award, which recognizes individuals demonstrating an exemplary dedication and proficiency in periodontology. He then went on to complete his specialty training and received his Certificate in Periodontics from the University of Medicine and Dentistry of New Jersey State.

To stay current with the latest treatments and techniques in periodontology, Dr. Leder routinely participates in continuing education courses. His commitment to continuing education allows him to offer the most advanced and highest quality care with successful outcomes.

Dr. Leder maintains membership with several professional organizations, providing him with opportunities for continuing education, including the American Academy of Periodontology, American Dental Association, Northeast Society of Periodontists, Alpha Omega Dental Fraternity, and American Society of Osseointegration.


Dr. Kevin Breen

Dr. Breen has always had a passion for science, health, and people. His approach to dentistry reflects his dedication to all three. With meticulous attention to detail and quality, he takes a comprehensive approach and has a gentle touch. Dr. Breen’s aim is to help each of his patients make informed decisions about their own health and smiles. He does not just tell, he shows. In much the same way he does not just explain, he listens.

Dr. Breen grew up northwest of Chicago in rural Hebron, Illinois. He received his Bachelor of Science degree in Biology from the University of Illinois at Urbana-Champaign and graduated from the University of Illinois at Chicago’s College of Dentistry in 2004. Dr. Breen is relentless in his pursuit of knowledge and is a firm believer in continuing education. He enjoys being part of the most recent advances in dentistry and will always consider himself an ongoing student of the profession. Before he moved to New York, he enjoyed working as the official dentist for the Chicago Wolves AHL professional hockey team in addition to private practice.

Dr. Breen’s other interests include traveling, cycling, baseball, hockey and all types of skiing– whether it be on fresh snow or open water. When the weekend weather is nice, you can often find him cycling along the Hudson or through Central Park and exploring everything, the city has to offer.

Dr. David Toksoy

Dr. David Toksoy

Dr. Toksoy’s motto is to provide his patients the information and knowledge on their own health, show them how they can change their lives with the help of a beautiful and healthy smile.

Receiving his Doctor of Dental Medicine degree from the prestigious Boston University School of Dental Medicine graduating with honors, Dr. Toksoy continued his education vigorously to provide the best dental care available to his patients. Dr. Toksoy did his oral and maxillofacial surgery externships at Harvard University, Tufts University, Loma Linda University and UCLA.

Being inspired and mentored by the father of biomimetic dentistry, Dr. Toksoy makes his smile designs customized to every patient, therefore, minimally preparing or not preparing any teeth while doing smile designs. Thus, avoiding any unnecessary harm to healthy teeth, following his motto, “First, to do no harm” while changing the smiles of patients and helping them smile with confidence and natural appearance.Beside his vigorous study on dentistry, Dr. Toksoy does acting and martial arts when he is not doing dentistry. He performs in theaters and plays. He is a big enthusiast of history, philosophy and fine arts. A member of Carnegie Council for Ethics, he is a big advocate of ethics and morality as a fan of Renaissance and Enlightenment eras. He travels frequently back to Europe to visit family and explore the history and artwork.


Elena – Hygienist

To say this is a big year for hygienist Elena Kirsanova is an understatement. Elena is dedicated to making 2019 the best year for her patients, she recently got married in Egypt to her husband Sayed.

Elena has been working in the dental field for over 23 years. She first started as a dental assistant and an office manager, graduating from a Dental Hygiene program at NYU College of Dentistry in 1999. Her top priority is to provide gentle and painless but thorough treatment as well as oral hygiene education. Elena desires simply the best outcome for all her patients.

Originally from Moscow Russia, Elena has been living in Brooklyn, New York. She is a proud mother of one son. When not at work, Elena teaches Oriental dance, performs with her troupe and creates dance costumes.


Tiffany – RDH

Gramercy Dental Center would like to welcome our newest addition to the family, Tiffy!!!!!! Tiffany’s passion for Dentistry initially began upon her employment as a dental assistant at the age of 16. Her exposure to dentistry at such a young age motivated her to advance her position to becoming a dental hygienist.

Tiffany attended New York City College of Technology and eventually earned her licensure required to serve the public in terms of improving oral health. Tiffany prides herself in providing excellent dental care to all of her patients, she believes in treating all patients the way she would her own family.

Tiffany is 22 years old and lives in Staten Island. She enjoys cooking (vegetarian), going to the gym, hanging out with friends, doing makeup, and waitressing on her spare time.

Stacy Sookram

Stacy Sookram – Office Manager

Stacy Sookram Office Manager, born in Trinidad and Tobago. I was raised on the Upper East Side,Manhattan. I completed high school at Penn Foster, obtained my Medical Billing and Coding certification at Molloy College, Rockville Centre NY ,obtained my Health Coaching certification through Institute for Integrative Nutrition,NY and continuing my education at Capella University.
I joined the practice in 2018.

My favorite thing about working in Dentistry are the relationships and bonds,I build with the patients and my team. It is always the best feeling when we provide patients with that Million Dollar Smile or we are part of another team members success. I am affiliated with AADOM.

On my days away from work I enjoy reading,traveling, meditation, yoga, spending time with my boyfriend and our King Charles Cavalier.

Favorite Quote:Learn to liberate your life,strip off the fear, wash away the self doubt and dress yourself in health, wealth and LOVE~ Melissa Ambrosini

Minorky De La Cruz

Minorky De La Cruz – Front Desk

I was born in the Dominican Republic
I was raised in the Bronx
I went to Walton HS and did a Dental Assistant Course.
I started this practice at 19 years old in 2017
I love coming to work and seeing our regular patients to catch up and seeing new patients leave the practice happy.
Outside of work I love to listen to music and spend quality time with friends and family. Fun fact about me is that I like to do adventurous things.

Aridai Dominguez

Aridai Dominguez – Assistant

I was born in Mexico
Raised in Brooklyn
Received my GED & went to school to become a Dental Assistant.
Going back to school to become a hygienist.
I joined the practice in April of 2019.
My favorite thing about working in this practice is the fact that I get along with my coworkers and the teamwork we have here.
Other than working full time at this practice I am a mother first.
Quote: No one is going to stop you from w.e goal you set yourself for except yourself.

Izvorinka Stojanovic

Izvorinka Stojanovic – Assistant

I, Izvorinka Stojanovic, born in a small town in Serbia . Came to the US when I was 17 years old to follow my dreams.
I’ve been a CDA for 20 years , I graduated from NYSMDA in 2003 .
At this moment I am working at GDC assisting doctors and making sure all of my patients feel comfortable and leave my chair loving their smile.
My continuing education. I also graduated at Christine Valmy as a Esthetician, my future goal is to bring spa into dentistry.
In my free time , keeping myself active hiking in the mountains, swimming , and playing tennis. My hobby is traveling to different countries and learning about the cultures and history .

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Our patients reviews


Based on 22 reviews

Love it love it!
I never been a fan of the dentist until I got to this office !
The staff is super friendly !
The doctor is great
And Tania find everything possible option to make it as affordable as possible with multiple payments options !
Make your appointment as soon as you can and you would be smiling like me

Elizabeth A.

I’ve been going to Gramercy (formally personal dental) dental for over 6 years. awesome staff, nice facility and helpful payment options. always feel well cared for and confident in the service and care. highly recommend.

Akia S.

I’ve been coming here for years, the prices are very reasonable! Dr. Shin is amazing and treated me with a lot of care and comfort. You never have to wait to be seen. Making appointments are very easy to do over the phone, they’re very flexible! HIGHLY RECOMMEND!

Jeanette D.

Dr Dorn is an experienced, professional dentist who provides top notch care.
Hygienist, Elena K, is by far the BEST hygienist I have ever met. Her 22yr experience in the field speaks for itself! Simply amazing!

Marjorie J.

I love the work that Liz performance in my mouth she is very responsible as she explained what is going to happen if I don’t take care of my teeth. I Love the treatment that she gives me, thank you !

Gahudys R.

Amazing experience, walked in without an appointment with a chip in my front tooth, got scene right away! The service was amazing the ladies on the counter were very helpful and accommodating! My doctor was a lovely lady named dr. Sciortino! Very gentle and professional also very fast! Wonderful experience will be making this my go to dentist in the future!

Lorraine G.

I haven’t gone to the dentist in over 15 years and my experience at Grammercy Dental Center was amazing! I was terrified of the procedures being painful but the dental hygientist took the tame ti explain everything to me and made me feel comfortable with all dental procedures. I would recomend this dental center to all my coworkers and everyone I know!

D B.

Thank God for new management ! My Dental hegenist Elaina was the best !!! She cleaned my teeth with love. I feel like a new person. The center is clean and beautiful. The people that work here are friendly and professional. Been coming for years and I definitely recommend this Dental Center.

Nafii J.

(212) 979-6363 Book an appointment