NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Chelsea Darby, MS CFY-SLP

Speech-Language Pathologist in Mc Lean, VA · enumerated 2021.

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

National Provider Identifier

1851964522

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Chelsea Darby
Credential MS CFY-SLP
Sex Female
Practice address 6251 Old Dominion Dr, Mc Lean, VA, 22101
Enumeration date Jul 21, 2021
Last updated in NPPES Jul 21, 2021

Taxonomy & licenses

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 2204000779 (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 is the NPI number for Chelsea Darby?
The National Provider Identifier (NPI) for Chelsea Darby is 1851964522, a Type 1 (individual) record in the CMS NPPES registry.
Where does Chelsea Darby practice?
The practice location on file with NPPES is in Mc Lean, VA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-07-21.