NPI Portal NPI Lookup & Verification

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

Dr. Marian Sidor, M.D.

Student in an Organized Health Care Education/Training Program in Atlantic City, NJ · enumerated 2016.

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

National Provider Identifier

1346694999

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Registry record

Entity type Individual (Type 1)
Name Dr. Marian Sidor
Credential M.D.
Sex Male
Practice address Atlantic City, NJ, 08401
Phone (609) 441-8990
Enumeration date Apr 20, 2016
Last updated in NPPES Apr 20, 2016

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

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care 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.

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Frequently asked questions

Where does Marian Sidor practice?
The practice location on file with NPPES is in Atlantic City, NJ. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Marian Sidor?
The National Provider Identifier (NPI) for Marian Sidor is 1346694999, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-04-20.