Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Jonathan Brett Jassey, DO

Individual provider Pediatric Adolescent Medicine Physician · NPI 1689887705

Jonathan Brett Jassey, DO is a Pediatric Adolescent Medicine Physician in Roslyn, New York. Practices as a sole proprietor. Licensed in New York.

Licensed in
NY
In the registry since
2007
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

1520 Old Northern Blvd
Roslyn, NY 11576-1126
Phone: (516) 514-7337
Fax: (802) 491-8229
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pediatric Adolescent Medicine Physician (primary) Taxonomy 2080A0000X · Licence 243849-1 (NY)

Record details

NPI number1689887705
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedMay 7, 2007
Last updated in NPPESJanuary 19, 2023
Certification dateJanuary 19, 2023
Mailing address2 Harvest Ct, Dix Hills, NY 11746-5602

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