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Stuart Horowitz, DO

Family Medicine Physician in Massapequa, NY · enumerated 2006.

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

National Provider Identifier

1972661155

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Registry record

Entity type Individual (Type 1)
Name Stuart Horowitz
Credential DO
Sex Male
Practice address 99 Grand Ave, Massapequa, NY, 11758
Phone (516) 541-9700
Fax (516) 798-1086
Enumeration date Dec 4, 2006
Last updated in NPPES May 16, 2008

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 134589 (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

Other identifiers

Identifier Type State Issuer
134589A73 Other - HEALTH FIRST
5066 Other - VYTRA
5431A1 Other - BLUE CROSS BLUE SHIELD
4121374 Other - AETNA
AP024 Other - OXFORD
5596318 Other - GHI
AA00617B Other - MDNY
201285536 Other - EMPIRE
201285536 Other - LOCAL 1199
201285536 Other - MULTI
4C1580 Other - PHS
0H380P Other - HIP
201285536 Other - HORIZON
315206 Medicaid NY -
201285536 Other - MAGACARE
500563012 Other - CIGNA
201285536 Other - UNITED HEALTHCARE
3C7540 Other - HEALTHNET

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

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Stuart Horowitz?
Stuart Horowitz is registered in NPPES with the primary taxonomy of Family Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-16.