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

Leah Ruth Ludington

Clinical Social Worker in Sammamish, WA · enumerated 2026.

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

National Provider Identifier

1144142936

Verified

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Registry record

Entity type Individual (Type 1)

Name Leah Ruth Ludington

Sex Female

Practice address Sammamish, WA, 98075

Phone (703) 473-8896

Enumeration date Jul 27, 2026

Last updated in NPPES Jul 27, 2026

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

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 0904007600 (VA) Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 61633380 (WA) 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 Leah Ludington?

The National Provider Identifier (NPI) for Leah Ludington is 1144142936, a Type 1 (individual) record in the CMS NPPES registry.

Where does Leah Ludington practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-07-27.