Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Diane Deng Flexsenhar, D.D.S

General Practice Dentistry in Reston, VA · enumerated 2009.

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

National Provider Identifier

1316174121

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Registry record

Entity type Individual (Type 1)

Name Dr. Diane Deng Flexsenhar

Credential D.D.S

Sex Female

Practice address 11711 Bowman Green Dr, Reston, VA, 20190

Phone (703) 437-8337

Enumeration date Jun 18, 2009

Last updated in NPPES Jan 2, 2024

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 24632 (TX) Secondary

1223G0001X General Practice Dentistry Dental Providers · License 0401418150 (VA) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS 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

Is NPI 1316174121 active?

Yes, as of the latest NPPES snapshot, NPI 1316174121 is active (record last updated 2024-01-02).

How do I verify Diane Flexsenhar's NPI record?

Cross-check NPI 1316174121 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Michael Hardin General Practice Dentistry · Reston, VA NPI 1386862597 Viral Patel General Practice Dentistry · Reston, VA NPI 1205468741

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-01-02.