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

Dr. Barbara Zelda Mazer, PH.D.

Psychologist in Mc Lean, VA · enumerated 2010.

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

National Provider Identifier

1104134436

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Registry record

Entity type Individual (Type 1)

Name Dr. Barbara Zelda Mazer

Credential PH.D.

Sex Female

Practice address Mc Lean, VA, 22101

Phone (301) 233-8179

Fax (301) 770-6768

Enumeration date Sep 21, 2010

Last updated in NPPES Sep 21, 2010

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

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 0810004273 (VA) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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

How do I verify Barbara Mazer's NPI record?

Cross-check NPI 1104134436 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1104134436 active?

Yes, as of the latest NPPES snapshot, NPI 1104134436 is active (record last updated 2010-09-21).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-09-21.