Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Mark Schonfeld, O.D.

Optometrist in Port Chester, NY · enumerated 2006.

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

National Provider Identifier

1356301345

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Registry record

Entity type Individual (Type 1)

Name Mr. Mark Schonfeld

Credential O.D.

Sex Male

Practice address 511 Boston Post Rd S.H. Laufer, Port Chester, NY, 10573

Phone (914) 937-3955

Fax (914) 937-0586

Enumeration date Mar 24, 2006

Last updated in NPPES Feb 3, 2015

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 0003036 (NY) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Mark Schonfeld practice?

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

What is the NPI number for Mark Schonfeld?

The National Provider Identifier (NPI) for Mark Schonfeld is 1356301345, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-02-03.