About
Dr. Jonathan Jassey has held board certification in pediatrics since 2007. He earned his medical degree from the New York College of Osteopathic Medicine and completed his pediatric residency at Winthrop University Hospital. He founded Concierge Pediatrics to practice the kind of medicine he believes in: deep relationships, unhurried visits, and care that feels like family. His clinical focus spans infant colic, sleep difficulties, and mental health conditions including autism, ADHD, anxiety, depression, and OCD. The LI Herald recognized him with its 2025 Excellence in Healthcare Award. He also earned the Patients' Choice Award three consecutive years and the Compassionate Doctor Recognition Award. Dr. Jassey co-authored 'The Newborn Sleep Book,' a resource for new parents navigating infant sleep. At home, he and his wife Suzanne raise three daughters. He coaches youth basketball, soccer, and softball, roots for the Mets, Giants, Knicks, and Islanders, and describes himself as a passionate foodie.
Education & Training
Medical School
New York College of Osteopathic Medicine
Residency
Pediatrics, Winthrop University Hospital
Certifications
Conditions Treated
Who is Dr. Jassey right for?
Dr. Jassey is a strong fit for families who want a long-term, relationship-driven pediatrician. Parents of newborns and infants dealing with colic or sleep difficulties will find his experience especially relevant. He treats children and young adults with autism, ADHD, anxiety, depression, and OCD. Families who value direct, unhurried access to their doctor tend to thrive in his care.
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Frequently Asked Questions
Dr. Jassey focuses on infant colic, sleep difficulties, and pediatric mental health. His mental health expertise covers autism, ADHD, anxiety, depression, and OCD. He treats patients from birth through age 30, handling both routine and complex pediatric concerns.
Yes, Dr. Jassey has held board certification in pediatrics since 2007. He earned his medical degree from the New York College of Osteopathic Medicine and completed his residency in pediatrics at Winthrop University Hospital.
Dr. Jassey has earned several professional honors. The LI Herald awarded him the 2025 Excellence in Healthcare Award. He also received the Patients' Choice Award three consecutive years and the Compassionate Doctor Recognition Award.
' The book gives new parents practical guidance on navigating infant sleep challenges.
Dr. Jassey attended the New York College of Osteopathic Medicine for his medical degree. He then completed his pediatric residency at Winthrop University Hospital.
Dr. Jassey sees patients from birth through age 30. His experience spans newborn care, childhood development, adolescent health, and young adult medicine.
Dr. Jassey integrates mental and behavioral health into his primary pediatric care. He has specific clinical experience with autism, ADHD, anxiety, depression, and OCD. He treats each patient with unhurried visits to better understand their full picture.
Doctor profile last updated March 21, 2026