Dental Staff

All professionals at Brownstone Dental maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in the medical field. Read on to learn more about our staff's experience and training.

Dr. Cormac MacDermott

Cormac MacDermott Dentist

Dr. Cormac MacDermott is a Diplomat of the American Board of Pediatric Dentistry (Board Certified) and a Fellow of the American Academy of Pediatric Dentistry. He graduated from the Columbia College of Dental Medicine and did his residency in Pediatric Dentistry at New York Presbyterian Hospital.

Dr. Cormac is comfortable and confident with children of all ages, personality types and medical conditions. He has an easy-going, gentle nature and sense of humor that, combined with a high level of skill and expertise, make dental visits not only educational but also enjoyable.

He is committed to children’s health both locally and globally. For the last several years he has provided free dental care to under-privileged children and their families through “Give Kids a Smile”, and has traveled extensively as a volunteer and advocate for children’s health.

Dr. Cormac lives in Brooklyn Heights with his wife, Erin, a veterinarian, and their two children. He is a long-suffering fan of the New York Jets.

Dr. Lisa Van Eyndhoven DDS

Lisa Van Eyndhoven DDS

Dr. Lisa Van Eyndhoven received her DDS from Columbia University College of Dental Medicine. She completed her pediatric dental residency at Columbia University/New York Presbyterian Hospital. She is a Diplomat if the American Board of Pediatric Dentistry (Board Certified). She is currently teaching pediatric dentistry in the residency program at Lincoln Hospital in the Bronx.

"Dr. Lisa" was born and primarily raised in New York City, but traveled the world at a young age with her diplomatic parents who are Belgian. She speaks four languages and has spent time in Sudan, Trinidad and Tobago, Ethiopia, Gabon, and Thailand including her annual visits to her family in Belgium. She has also performed dental outreaches in Guatemala and Dominican Republic.

Along with traveling, "Dr. Lisa" loves silly jokes and songs. She is patient and takes the time to make children and parents feel at ease in the dental environment. She lives in Chelsea with her kitten Coconut.

Dr. John C. DiMaggio


Dr. John C. DiMaggio graduated from the University of Illinois at Urbana/Champaign with a Bachelor of Science in Molecular Biology and Anthropology. He would later graduate with honors from New York University with a Master's in Human Skeletal Biology and continue to obtain his Doctorate in Dental Surgery from the New York University College of Dentistry. He would participate in the NYU Global Outreach program helping underserved children and families in Kathmandu, Nepal. He would return to complete his general practice residency at New York Presbyterian Brooklyn Methodist Hospital.

Dr. DiMaggio continues to stay current with the latest dental innovations by being an active member of dental associations such as the Second District Dental Society and continues his pursuit of knowledge by participating in continuing education seminars while attending national meetings. He is an easy-going, upbeat, and honest individual who enjoys educating his patients on the benefits of good oral health. He values the trust and confidence his patients put in him and takes pride in treating his patients as if they were part of the family.

Originally a Chicago native, Dr. DiMaggio enjoys good pizza and loves trying hip, new restaurants! For leisure, he also enjoys eating well, hiking in the Catskills, running, apple/pumpkin-picking, Star Wars, and board games.

Dr. Valerie Chin


Dr. Valerie Chin received her Bachelor of Arts degree from the University of Pennsylvania and Doctorate in Dental Surgery from Columbia University College of Dental Medicine. She continued her specialty training at Columbia University completing her residency program in Orthodontics and earning a Masters of Science.

Dr. Chin’s own childhood experience with braces inspired her to become an orthodontist and she is excited to share her enthusiasm and knowledge with her patients. Her extensive training and experience in orthodontics include early interceptive treatment on children, complex multidisciplinary treatment on adults, and clear aligner therapy such as Invisalign on children, teens, and adults. She is committed to staying abreast of the latest techniques in orthodontics to provide her patients with the most advanced care and is an active member of the American Association of Orthodontists.

When Dr. Chin is not in the office, she enjoys staying active indoors and outdoors including spin classes, skiing, and scuba diving. She is a New York City native and currently resides in Brooklyn Heights with her husband.



Dr. Lisa Lian

Dr. Lisa Lian

Dr. Lisa Lian graduated from Harvard School of Dental Medicine and completed her residency in Pediatric Dentistry at Columbia University - New York-Presbyterian Hospital. She enjoys teaching future dentists as an Assistant Professor and Director for Pediatric Dentistry at New York University College of Dentistry. She is also a Diplomat of the American Board of Pediatric Dentistry (Board Certified)

Dr. Lian strives to create an atmosphere that is both fun and nurturing for her patients. She believes in educating children and parents about oral health to establish a lifetime of confident, happy smiles. In her free time, she enjoys swing dance, playing intramural sports with friends, and exploring her neighborhood of Long Island City, NY.

Our Hours


9:00 am-6:00 pm


9:00 am-6:00 pm


9:00 am-6:00 pm


9:00 am-6:00 pm


9:00 am-6:00 pm


9:00 am - 2:00 pm (alternate weeks)



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