NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark S Schnitzer, MD

Neurological Surgery Physician in Fullerton, CA · enumerated 2006.

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

National Provider Identifier

1740382951

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mark S Schnitzer
Credential MD
Sex Male
Practice address 1400 N Harbor Blvd, 540, Fullerton, CA, 92835
Fax (714) 525-6769
Enumeration date Sep 1, 2006
Last updated in NPPES Jan 11, 2008

Taxonomy & licenses

207T00000X Neurological Surgery Physician Allopathic & Osteopathic Physicians · License A52917 (CA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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 Schnitzer practice?
The practice location on file with NPPES is in Fullerton, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mark Schnitzer?
The National Provider Identifier (NPI) for Mark Schnitzer is 1740382951, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-01-11.