Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Ms. Neli Velentzas, LCSW

Clinical Social Worker in Arlington, VA · enumerated 2014.

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

National Provider Identifier

1144623372

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Registry record

Entity type Individual (Type 1)

Name Ms. Neli Velentzas

Credential LCSW

Sex Female

Practice address Arlington, VA, 22204

Phone (703) 228-1600

Enumeration date Oct 2, 2014

Last updated in NPPES Aug 23, 2019

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License LG50080335 (DC) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 0904010637 (VA) Primary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW 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

What is the NPI number for Neli Velentzas?

The National Provider Identifier (NPI) for Neli Velentzas is 1144623372, a Type 1 (individual) record in the CMS NPPES registry.

Where does Neli Velentzas practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-08-23.