Meet Dr. Mariel Brooke Deutsch

Trusted Long Island, NY Neurologist and Dementia Specialist

Dr. Mariel Deutsch, MD - Dementia Specialist in New York

Mariel B. Deutsch, MD, FAAN attended undergraduate school at Cornell University, where she majored in Human Biology, Health and Society. She then earned her medical degree from the Mount Sinai School of Medicine.

Dr. Deutsch trained at New York Presbyterian Hospital – Weill Cornell Medical College for her internal medicine internship and neurology residency. She completed a fellowship in Neuro-Oncology at Memorial Sloan-Kettering Cancer Center, initially being drawn to the field by a fascination for rare neurobehavioral syndromes. She then pursued that interest through a two-year Behavioral Neurology and Neuropsychiatry Fellowship at the David Geffen School of Medicine at UCLA and the VA Greater Los Angeles Healthcare System.

Dr. Deutsch initially worked as an Attending Neurologist at the Mount Sinai Hospital and was an Assistant Professor in the Department of Neurology at the Icahn School of Medicine at Mount Sinai. There she trained medical students and residents, as well as a Behavioral Neurology and Neuropsychiatry fellow in one of two programs of its kind at the time in New York.

Dr. Deutsch then moved her practice to Long Island to be closer to her family. She worked as an Attending Neurologist at North Shore University Hospital, Long Island Jewish Medical Center, and Zucker Hillside Hospital, and was Assistant Professor in the Department of Neurology of the Donald and Barbara Zucker School of Medicine at Hofstra/Northwell. While working at Northwell, Dr. Deutsch trained medical students, residents, and fellows of various disciplines, including neurology, internal medicine, geriatric medicine, psychiatry, and neuropsychology. She became a trusted resource to her colleagues within the Department as well as other physicians within and outside Northwell, all over Long Island and New York City.

In 2022, Dr. Deutsch left her busy academic practice to pursue private practice, to continue providing the unique, personalized care her patients and caregivers deserve. In her new care model, she provides an in-depth consultation or second opinion, rather than ongoing chronic care management.  It was very hard for her to say goodbye to her patients and their families, with whom she had developed such strong connections. Her greatest compliment was how many of her patients knew each other, because one would see her and then refer their friend in need. She was grateful for how they all wished her well in her pursuit to deliver high quality neurobehavioral guidance in her own unique way.

Dr. Deutsch is ABPN Board Certified in Neurology, and UCNS Subspecialty Certified in Behavioral Neurology and Neuropsychiatry. In 2022, Dr. Deutsch was awarded Finalist for the category of Neurologist in the Herald Long Island Choice Awards. In 2023, Dr. Deutsch was elected a Fellow of the American Academy of Neurology (FAAN), the most prestigious level of membership in the world’s largest professional association of neurologists and neuroscientists. For more information on her publications and awards, go to her profiles on Doximity and LinkedIn.

Care Philosophy

Dr. Deutsch is passionate about being thorough in her approach to evaluations. And to be thorough requires time. Patients and families get all the time they need.

Personal Life

Dr. Deutsch lives in the same town where she works with her husband and two sons. She loves spending time with her family exploring local parks and playgrounds, watching the boys’ sports classes, collecting shells at Lido Beach, playing Pokémon, and building countless LEGO® creations in their home. She is also learning to play the violin and crochet.

Let Dr. Deutsch Help.