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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Jonathan Brett Jassey, D.O.

Pediatric Adolescent Medicine Physician in Roslyn, NY · enumerated 2007 · practices at Concierge Pediatrics, PC.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1689887705

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Registry record

Entity type Individual (Type 1)
Name Jonathan Brett Jassey
Credential D.O.
Sex Male
Practice address Roslyn, NY, 11576
Phone (516) 514-7337
Fax (802) 491-8229
Enumeration date May 7, 2007
Last updated in NPPES Jan 19, 2023

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

2080A0000X Pediatric Adolescent Medicine Physician Allopathic & Osteopathic Physicians · License 243849-1 (NY) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Where does Jonathan Jassey practice?
The practice location on file with NPPES is in Roslyn, NY. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Jonathan Jassey?
The National Provider Identifier (NPI) for Jonathan Jassey is 1689887705, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-01-19.