Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ms. Katherine Rae Hamilton
Social Worker in Seattle, WA · enumerated 2025.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1821989468
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Registry record
Entity type Individual (Type 1)
Name Ms. Katherine Rae Hamilton
Sex Female
Practice address 400 N 34th St Ste 320, Seattle, WA, 98103
Phone (564) 238-3068
Fax (206) 902-9666
Enumeration date Jul 11, 2025
Last updated in NPPES Aug 8, 2025
Taxonomy & licenses
104100000X Social Worker Behavioral Health & Social Service Providers · License SC70002480 (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.
Frequently asked questions
What is the NPI number for Katherine Hamilton?
The National Provider Identifier (NPI) for Katherine Hamilton is 1821989468, a Type 1 (individual) record in the CMS NPPES registry.
Where does Katherine Hamilton practice?
The practice location on file with NPPES is in Seattle, WA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Wesley Weidle Physician Assistant · Seattle, WA NPI 1689182529 Dominique Savage Mental Health Counselor · Seattle, WA NPI 1104420678 Carmen Valenzuela Social Worker · Seattle, WA NPI 1225929888 Abigail Staley Mental Health Counselor · Seattle, WA NPI 1841168796 Riley Evans Mental Health Counselor · Seattle, WA NPI 1437076395 Calvin Williams Social Worker · Seattle, WA NPI 1265350995
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-08.