Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Sydney Castle

Individual provider Social Worker · NPI 1477439594

Sydney Castle is a Social Worker in Seattle, Washington. Licensed in Washington. Registered with an NPI since 2025.

Licensed in
WA
In the registry since
2025

Practice location Address checks out

901 Boren Ave Ste 900
Seattle, WA 98104-3596
Phone: (206) 257-3199
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Social Worker (primary) Taxonomy 104100000X · Licence 61674183 (WA)

Record details

NPI number1477439594
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorNo
NPI enumeratedAugust 13, 2025
Last updated in NPPESSeptember 5, 2025
Certification dateSeptember 5, 2025
Mailing address22809 Lakeview Dr Apt E302, Mountlake Terrace, WA 98043-2880

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