Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Diana Ragan Clark

Pharmacist in Falls Church, VA · enumerated 2017.

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

National Provider Identifier

1700312782

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Registry record

Entity type Individual (Type 1)

Name Diana Ragan Clark

Sex Female

Practice address 201 N Washington St, Pharmacy, Falls Church, VA, 22046

Phone (703) 237-4000

Enumeration date May 11, 2017

Last updated in NPPES May 11, 2017

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 0202212163 (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

What specialty is Diana Clark?

Diana Clark is registered in NPPES with the primary taxonomy of Pharmacist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-05-11.