128 Mott St., Suite 403  |  New York, NY 10013  |  Call Us: 212-965-8113 | 
Dr. Jessica Marn - Union Pediatric Dental in Manhattan Dr. Jessica Marn - Union Pediatric Dental in Manhattan

About Us

Dr. Jessica Loo Marn

Dr. Jessica Loo Marn - Pediatric Dentist in Lower East Side New York While earning her D.D.S. Degree at New York University School of Dentistry, Dr. Marn found her calling and passion for treating children, as well as Special Needs patients, when she provided dentistry and oral care advocacy for the Special Olympics and Episcopal Social Service in NYC. She then began her pediatric dental residency training at St. Barnabas Hospital (Bronx, NY), nationally recognized as one of the most arduous programs in the country. Upon completion, she earned her board certification in pediatric dentistry and opened her 1st dental practice on Mott Street (Manhattan, NY), a special place in her heart where she spent much of her childhood visiting her grandmother, cousins, and friends.

Dr. Marn has been specifically practicing pediatric dentistry in New York since 2003. She is a Clinical Professor in Pediatric Dentistry at Mt. Sinai Hospital for more than 10 years and has been commended as a “Top Dentist” by the Consumer Research Council of America since 2008.

Patients come to her as young as 6 months old through adolescence. Patients come to establish a dental home, get their 1st check-up, conduct a routine visits, and, if necessary, receive more advanced pediatric dental care and procedures.

Because Dr. Marn performed over 3,000 cases requiring nitrous oxide, intravenous sedation, or general anesthesia, she has developed a unique clinical expertise that few of her colleagues possess.

Dr. Marn is passionate about sharing the benefits of pediatric dental care with her community. She currently serves on the Early Head Start Health Advisory Committee and partners with Colgate, Oral B, Crest and Henry Schein to bring dental education and awareness to Head Start communities.

In her free time, Dr. Marn enjoys spending time with her husband, two children and their dog. She likes to volunteer at her children’s school, travel and spend time with family and friends. In addition, she has joined Cycle for Survival in their efforts to raise money for rare cancer research.

"I believe in treating my patients as if they were my own children. Trust is the key to forming a lifelong bond not just with my patients but also with the parents."
~ Jessica Loo Marn, DDS
  • Board Certified: American Academy of Pediatric Dentistry (ABPD).
  • Doctor of Dental Surgery : New York University College of Dentistry.
  • Chief Resident in Pediatric Dentistry at St. Barnabas Hospital.
  • Rose F. Kennedy Center treating patients with physical and developmental disabilities .
  • General Practice Residency at Coler-Goldwater Specialty Hospital working with special needs pediatric and geriatric patients.
  • Contributor for U.S. News & World Report Article on “Dentists Offer Tips to Keep Young Children Cavity-Free” February 2015.
  • American Board of Pediatric Dentistry
  • American Academy of Pediatric Dentistry
  • American Dental Association
  • New York State Dental Association
  • New York Academy of Pediatric Dentistry

Dr. Richard Marn

Dr. Richard Marn - Pediatric Anesthesiologist serving the Upper East Side, Turtle Bay, Sutton Place, Midtown and Roosevelt Island Dr. Richard Marn, a Board-Certified anesthesiologist and Board-Certified pediatric anesthesiologist with over 15 years of experience.

Dr. Marn was born and raised in Honolulu, Hawaii. He received his undergraduate degree in Chemistry from Washington University, graduating magna cum laude, and earned his medical degree from the John A. Burns School of Medicine at the University of Hawaii. After his surgery internship at the University of Colorado Health Sciences Center, he completed an anesthesiology residency at New York University Medical Center and Bellevue Hospital in 2004. He subsequently accomplished a one-year pediatric anesthesiology fellowship at the prestigious Johns Hopkins Hospital in 2005, which at the time was ranked the top hospital in the nation.

Dr. Marn then began working at Mt. Sinai Hospital. As an assistant professor in the division of pediatric anesthesiology at Mt. Sinai Hospital, he has helped train hundreds of residents during which time he was awarded Teacher of the Year in 2008.

As a full time faculty member for over 10+ years at Mt Sinai, Dr. Marn performed over 11,000 anesthetics (41% pediatric cases, 59% adult cases) for a diverse array of surgeries and procedures. He has worked extensively with multiple nationally-recognized pediatric and adult surgeons and specialists in plastic surgery, general surgery, dental surgery, urology, neurosurgery, liver transplant surgery, and gastroenterology. He has safely performed anesthetics on patients as small as 3 pounds to as large as 360 pounds, and as young as 12 hours old to as old as 94 years old.

During his last couple years at Mt. Sinai, Dr. Marn co-founded the Division of Radiologic Anesthesiology and served as its first Chief of Radiologic Anesthesiology. He helped grow the Department of Anesthesiology’s role in the Radiology Department and the Hospital itself, and created a core group of designated anesthesiologists specializing in radiologic procedures. Dr. Marn improved the way anesthesia was delivered for such radiologic procedures as TIPS, angioplasties, and pediatric and adult neuro-interventional intravascular embolizations. During his leadership of the Division of Radiologic Anesthesiology, the number of anesthesia procedures more than doubled from 110 cases/month to over 230 cases/month. Dr. Marn is very proud of being able to help so many patients during his tenure at Mt. Sinai while also strengthening his department.

In 2016 Dr. Marn departed Mt. Sinai to focus exclusively on private practice and office-based anesthesiology. He remains an active member of the American Society of Anesthesiology, Society of Pediatric Anesthesia, New York State Society of Anesthesiologists, International Anesthesia Research Society, and the Society of Ambulatory Anesthesia. He is double Board-Certified in Anesthesiology and Pediatric Anesthesiology via the American Board of Anesthesiology.

You can find out more about Dr. Richard Marn by visiting his website www.nymedicalanesthesia.com . You can also download the necessary health forms, instruction sheets, and consent forms prior to your sedation appointment.

Dr. Alina O’Brien

Dr. O'Brien - Pediatric Dentist Dr. Alina O’Brien earned her dental degree from Columbia University College of Dental Medicine and completed specialty post-graduate training in Pediatric Dentistry from New York-Presbyterian Hospital/Columbia University, where she served as Chief Resident.

In addition to private practice, Dr. O'Brien is part of a study team at Columbia University College of Dental Medicine researching the prevention of early childhood caries. Dr. O'Brien is also an active member of the American Academy of Pediatric Dentistry, the American Dental Association, and the New York County Dental Society, and is a past board member of the Hispanic Dental Association.

Dr. O'Brien is a native New Yorker who was raised in downtown Manhattan. She is excited to practice in the city she grew up in.

Dr. Amanda Dewundara

Dr. O'Brien - Pediatric Dentist “Dr. Amanda” finds a lot of joy in working with children. Her warm and nurturing demeanor makes visits to the dentist a bit less intimidating…and even fun! She believes that each child is important, and feels it is a privilege to serve your family.

Amanda graduated on the Dean’s List at the University of Pennsylvania. She then pursued research at Harvard University, where she worked in underserved communities to better understand the relationship of diet and obesity to dental caries. She came to appreciate the social determinants of health, and solidified her passions in dentistry and public health.

She earned her Doctorate of Dental Surgery (D.D.S.) and Master of Public Health (M.P.H.) from Columbia University. She went on to complete her pediatric specialty training at Montefiore Medical Center in the Bronx, NY. She gained experience in treating a diverse patient population, delivering care to healthy, disabled, and medically complex children.

Dr. Amanda is a Board Certified Pediatric Dentist. She holds active memberships to the American Board of Pediatric Dentistry, American Academy of Pediatric Dentistry, and the New York State Dental Association.

In her free time, Amanda loves to sing and practice yoga. (You may even catch her serenading her patients! Feel free to request a song.) She cares about gender equity and equal opportunity, and mentors vibrant young students in the city. Last but not least, she is also serious about food – and delights in NYC hole-in-the-walls.

128 Mott Street, Suite 403
New York, NY 10013

Phone: 212-965-8113

Urban Pediatric
Pediatric Dentist serving Lower East Side, Financial District and Tribeca
Pediatric Dentist serving Lower East Side, Financial District and Tribeca
Pediatric Dentist serving Lower East Side, Financial District and Tribeca
Pediatric Dentist serving Lower East Side, Financial District and Tribeca