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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

CALVIN WILLIAMS
NPI 1265350995
Social Worker in Seattle, WA

Active since July 09, 2026
400 N 34TH ST STE 320, SEATTLE, WA 98103(206) 385-7864 Get Directions Write a Review

NPPES record added: July 9, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Calvin Williams NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CALVIN WILLIAMS (NPI 1265350995) is an individual social worker in Seattle, Washington, licensed in Washington (SWIA.SC.70134673) and active in the NPI registry since July 2026.

NPPES Registry Identity

NPI1265350995
Entity TypeIndividualMale
Primary Taxonomy104100000X
Provider Legal NameCALVIN WILLIAMS
Location Address400 N 34TH ST STE 320Seattle, WA 98103-5296
Mailing Address400 N 34th St Ste 320Seattle, WA 98103-5296
Phone(206) 385-7864
Sole ProprietorNo
Enumeration DateJuly 9, 2026
NPPES CertifiedJuly 9, 2026
✔ NPI 1265350995 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial WorkerBehavioral Health & Social Service Providers
Taxonomy Code104100000X
License✔ Licensed in WA · SWIA.SC.70134673
Definition
A social worker is a person who is qualified by a Social Work degree, and licensed, certified or registered by the state as a social worker to practice within the scope of that license. A social worker provides assistance and counseling to clients and their families who are dealing with social, emotional and environmental problems. Social work services may be rendered to individuals, families, groups, and the public.
400 N 34TH ST STE 320, Seattle, WA 98103
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Other Providers at the Same Location NPPES 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DOMINIQUE SAVAGE B.A, M.A.
Counselor (Mental Health)
400 N 34TH ST STE 320
SEATTLE, WA 98103
King County (206) 486-8270
CARMEN VALENZUELA
Social Worker
400 N 34TH ST STE 320
SEATTLE, WA 98103
King County (564) 238-3068
RILEY C EVANS
Counselor (Mental Health)
400 N 34TH ST STE 320
SEATTLE, WA 98103
King County (206) 486-8270
WESLEY D WEIDLE PA-C
Physician Assistant
400 N 34TH ST STE 320
SEATTLE, WA 98103
King County (206) 486-8270
MS. KATHERINE RAE HAMILTON
Social Worker
400 N 34TH ST STE 320
SEATTLE, WA 98103
King County (564) 238-3068
ABIGAIL STALEY
Counselor (Mental Health)
400 N 34TH ST STE 320
SEATTLE, WA 98103
King County (206) 486-8270

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Calvin Williams's NPI number?

The NPI number for Calvin Williams is 1265350995. It was assigned to this individual provider in the NPPES registry on July 9, 2026.

Where is Calvin Williams located?

Calvin Williams practices at 400 N 34th St Ste 320, Seattle, WA 98103. The listed phone number is (206) 385-7864.

What is Calvin Williams's specialty?

The primary specialty registered for this NPI is Social Worker with taxonomy code 104100000X.

When was this NPI record last updated?

The NPPES record for Calvin Williams was last updated on July 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 28 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.