Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mary Elizabeth Walker, PA-C

Q: What is the NPI number for Mary Walker?

The National Provider Identifier (NPI) for Mary Walker is 1104169549, a Type 1 (individual) record in the CMS NPPES registry.

Physician Assistant in Leesburg, VA · enumerated 2013 · practices at Centers for Advanced Orthopaedics, LLC.

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

National Provider Identifier

1104169549

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Registry record

Entity type Individual (Type 1)

Name Mary Elizabeth Walker

Credential PA-C

Sex Female

Practice address 19465 Deerfield Ave Ste 405, Leesburg, VA, 20176

Phone (703) 858-1800

Fax (703) 858-1801

Enumeration date Apr 4, 2013

Last updated in NPPES Jun 17, 2024

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License C05036 (MD) Secondary

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 0110007139 (VA) Primary

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 Mary Walker practice?

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

What is the NPI number for Mary Walker?

The National Provider Identifier (NPI) for Mary Walker is 1104169549, 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 2024-06-17.