Jonathan B. Jassey, DO

Jonathan B. Jassey, DO
Title: Pediatrician
Education: New York College of Osteopathic Medicine
Expertise: Pediatrics
  • Bellmore Merrick Medical Private Pediatrician
  • Co-author of “The Newborn Sleep Book”
  • Board-certified by the American Academy of Pediatrics


Jonathan B. Jassey, DO, is a private pediatrician at Bellmore Merrick Medical. Dr. Jassey also specializes in treating ADHD, anxiety, depression, OCD, autism and other mental health issues. He is passionate about treating the “colicky” infant and helping to get a baby to successfully sleep through the night at a young age. Dr. Jassey chronicles his methods in “The Newborn Sleep Book.” He has been awarded the Patients’ Choice Award for three consecutive years for his near perfect scores in votes from his patients. For his impact with the health of his patients and superior bedside manner, Dr. Jassey has also been awarded the Compassionate Doctor Recognition Award.

To have a reliable source of medical information that is backed up by medical professionals is paramount.

-Dr. Jonathan B. Jassey


He graduated from the New York College of Osteopathic Medicine. Dr. Jassey completed his residency in pediatrics at Winthrop University Hospital.

About Health

Health, a Dotdash Meredith Brand, is an award-winning online resource for empathetic, trustworthy, and actionable health and wellness information so you can make the best choice for your health. We reach more than 9 million readers a month. We ensure the accuracy of our content by relying on seasoned health journalists, credentialed medical professionals and thorough fact checkers. Learn more about us and our editorial process.

Latest from Jonathan B. Jassey, DO