Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Abigail Williams, LGSW

Social Worker in Washington, DC · enumerated 2023.

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

National Provider Identifier

1023790516

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Registry record

Entity type Individual (Type 1)

Name Abigail Williams

Credential LGSW

Sex Female

Practice address 2333 Ontario Rd Nw, Washington, DC, 20009

Phone (202) 483-8196

Enumeration date Aug 3, 2023

Last updated in NPPES Aug 3, 2023

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License LG200002595 (DC) 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 Abigail Williams?

The National Provider Identifier (NPI) for Abigail Williams is 1023790516, a Type 1 (individual) record in the CMS NPPES registry.

Where does Abigail Williams practice?

The practice location on file with NPPES is in Washington, DC. 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 2023-08-03.