NPI Portal NPI Lookup & Verification

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

Dr. Mark H Lazar, M.D.

Neurology Physician in East Brunswick, NJ · enumerated 2006.

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

National Provider Identifier

1679639850

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Registry record

Entity type Individual (Type 1)
Name Dr. Mark H Lazar
Credential M.D.
Sex Male
Practice address East Brunswick, NJ, 08816
Phone (732) 254-5101
Fax (732) 254-2640
Enumeration date Dec 29, 2006
Last updated in NPPES Dec 2, 2010

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

Taxonomy & licenses

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 42290 (NJ) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
4245241 Other NJ AETNA PIN
50389 Other NJ EMPIRE BC BS

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

How do I verify Mark Lazar's NPI record?
Cross-check NPI 1679639850 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1679639850 active?
Yes, as of the latest NPPES snapshot, NPI 1679639850 is active (record last updated 2010-12-02).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-12-02.