Summary

Dr. Jassey graduated from the New York Institute of Technology College of Osteopathic Medicine in 2004. He works in Roslyn, NY and 3 other locations and specializes in Adolescent Medicine and Pediatrics. Dr. Jassey is affiliated with Mount Sinai South Nassau and SYOSSET HOSPITAL.

Quick Facts

  • accepting new patients
  • 4.1
  • 22 years of experience
  • speaks English, Spanish
  • Winthrop University Hospital
  • 10 written reviews
  • 2 specialties
  • 6 areas of expertise
  • 2 board certifications
  • 2 hospital affiliations
  • 4 office locations
  • Male

Office Locations

Dr. Jonathan Brett Jassey has 4 locations

Concierge Pediatrics

1520 Old Northern BlvdRoslyn, NY 11576
Mon9:00 am - 5:00 pm
Tue9:00 am - 5:00 pm
Wed9:00 am - 5:00 pm
Thu9:00 am - 5:00 pm
Fri9:00 am - 3:00 pm
Sat9:00 am - 12:00 pm
SunClosed

Mount Sinai South Nassau

1 Healthy WayOceanside, NY 11572

Syosset Hospital

221 Jericho TpkeSyosset, NY 11791

Concierge Pediatrics

7952 Jericho TpkeWoodbury, NY 11797
Mon9:00 am - 5:00 pm
Tue9:00 am - 5:00 pm
Wed9:00 am - 5:00 pm
Thu9:00 am - 5:00 pm
Fri9:00 am - 3:00 pm
Sat9:00 am - 12:00 pm
SunClosed

Compare with Similar Doctors

Dr. Jonathan Brett Jassey, DO
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New York Comprehensive Medical Care
Dr. Jonathan Brett Jassey, DODr. Khushbu Shah, MDDr. Alwyn T Cohall, MDNew York Comprehensive Medical Care
Adolescent MedicineAdolescent MedicineAdolescent MedicineAdolescent Medicine
Accepts New Patients Accepts New Patients Accepts New Patients
4.1 
4.5 
22 Years of Experience 12 Years of Experience 46 Years of Experience
No Virtual Visit Option No Virtual Visit Option Virtual Visit Available No Virtual Visit Option
Speaks English, Spanish Speaks English
Roslyn , NYIselin , NJNew York , NYSmithtown , NY
Med School: New York Institute Of Technology College Of Osteopathic Medicine Med School: American University Of Antigua College Of Medicine Med School: Rutgers New Jersey Medical School
Current Profile
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Insurance Plans Accepted by Dr. Jonathan Brett Jassey

Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.

Medical Specialties

Dr. Jonathan Brett Jassey has the following 2 specialties

Specialty Expertise

Dr. Jonathan Brett Jassey has the following 6 areas of expertise

  • Acne
  • Birth Control
  • Eating Disorders
  • Pediatrics
  • Sexually Transmitted Diseases
  • Substance Abuse

Certifications, License, & Education

22 Years Experience

MEDICAL LICENSE

Doctor Of Osteopathy, New York, 2026, Active

EDUCATION & TRAINING

Residency

Winthrop University Hospital

Medical School

New York Institute Of Technology College Of Osteopathic MedicineGraduated in 2004

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Frequently Asked Questions

Where is Dr. Jonathan Jassey's office located?
Dr. Jonathan Jassey's office is located at 1520 Old Northern Blvd, Roslyn, NY, 11576.
Does Dr. Jonathan Jassey accept virtual/telehealth appointments?
Dr. Jonathan Jassey has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Which hospitals is Dr. Jonathan Jassey affiliated with?
Dr. Jonathan Jassey is affiliated with Mount Sinai South Nassau and SYOSSET HOSPITAL.
Does Dr. Jonathan Jassey accept my insurance?
You can see the insurance plans that Dr. Jonathan Jassey accepts on their Vitals profile.
Is Dr. Jonathan Jassey accepting new patients?
Dr. Jonathan Jassey is accepting new patients on Vitals. View Dr. Jonathan Jassey's profile on Vitals to make an appointment.

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