Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. David Owen Mazur, MD

Q: What is the NPI number for David Mazur?

The National Provider Identifier (NPI) for David Mazur is 1326041609, a Type 1 (individual) record in the CMS NPPES registry.

Ophthalmology Physician in Bethesda, MD · enumerated 2005 · practices at U.S. Navy.

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

National Provider Identifier

1326041609

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Registry record

Entity type Individual (Type 1)

Name Dr. David Owen Mazur

Credential MD

Sex Male

Practice address National Naval Medical Ctr, 8901 Wisconsin Avenue, Bethesda, MD, 20889

Phone (301) 295-0372

Fax (301) 295-1481

Enumeration date May 31, 2005

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License D0008515 (MD) 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 David Mazur practice?

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

What is the NPI number for David Mazur?

The National Provider Identifier (NPI) for David Mazur is 1326041609, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.