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Sean C Osullivan, PHYSICIAN ASSISTANT

Physician Assistant in Brewster, NY · enumerated 2006.

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

National Provider Identifier

1437103090

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Registry record

Entity type Individual (Type 1)
Name Sean C Osullivan
Credential PHYSICIAN ASSISTANT
Sex Male
Practice address 111 Clock Tower Cmns, Northern Medical Group, Pllc, Brewster, NY, 10509
Fax (845) 592-4914
Enumeration date May 19, 2006
Last updated in NPPES Feb 11, 2017

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 009491 (NY) Primary

Other identifiers

Identifier Type State Issuer
02532709 Medicaid NY -

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

What is the NPI number for Sean Osullivan?
The National Provider Identifier (NPI) for Sean Osullivan is 1437103090, a Type 1 (individual) record in the CMS NPPES registry.
Where does Sean Osullivan practice?
The practice location on file with NPPES is in Brewster, NY. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-02-11.