Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Jennifer L Diefenderfer, PTA

Physical Therapy Assistant in Centreville, MD · enumerated 2011.

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

National Provider Identifier

1639476435

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Registry record

Entity type Individual (Type 1)

Name Mrs. Jennifer L Diefenderfer

Credential PTA

Sex Female

Practice address 205 Armstrong St, Centreville, MD, 21617

Phone (410) 758-2323

Fax (410) 758-4493

Enumeration date Feb 15, 2011

Last updated in NPPES Feb 15, 2011

Taxonomy & licenses

225200000X Physical Therapy Assistant Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License PTA-A3168 (MD) 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.

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Frequently asked questions

Where does Jennifer Diefenderfer practice?

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

What is the NPI number for Jennifer Diefenderfer?

The National Provider Identifier (NPI) for Jennifer Diefenderfer is 1639476435, 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 2011-02-15.