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

Dr. Jeffrey Howard Markowitz, D.D.S.

Prosthodontics in Manhasset, NY · enumerated 2007.

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

National Provider Identifier

1386863249

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Registry record

Entity type Individual (Type 1)

Name Dr. Jeffrey Howard Markowitz

Credential D.D.S.

Sex Male

Practice address Manhasset, NY, 11030

Phone (516) 365-3535

Fax (516) 365-3748

Enumeration date Apr 25, 2007

Last updated in NPPES Jul 8, 2007

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

Taxonomy & licenses

1223P0700X Prosthodontics Dental Providers · License 035133 (NY) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

Other identifiers

Identifier	Type	State	Issuer
035133	Other	NY	LICENCE

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Jeffrey Markowitz practice?

The practice location on file with NPPES is in Manhasset, NY. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Jeffrey Markowitz?

The National Provider Identifier (NPI) for Jeffrey Markowitz is 1386863249, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.