Sydney Castle
Social Worker • Seattle, WA
Professional Overview & Biography Verified Profile Summary
Sydney Castle is a registered healthcare professional specializing in Social Worker in Seattle, WA. Practice services are available at 901 BOREN AVE STE 900 under active NPI credentials.
Practice Location & Contact Primary Location
901 Boren Ave Ste 900
Seattle, WA 981043596
Specialty Benchmarks & Practice Insights
Comparative analytics for Social Worker in Seattle, WA
Practicing in Seattle, WA (2183 Statewide)
In-Person Office Visits Only
Under CMS Medicare Fee Schedule vs Standard Submitted Charges
Medical Specialties & State Licenses
CMS Verified: 2025-09-05NUCC Taxonomy Code: 104100000X
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.
Practice Associates & Co-Workers
Healthcare professionals and specialists practicing at this location or sharing practice phone/fax
Social Worker
Social Worker - Clinical
Career & Practice History Timeline
Chronological log of verified NPI updates, location relocations, credentials, and registry changes
NPI status registered as active in NPPES database
Registered at 901 BOREN AVE STE 900, SEATTLE, WA 981043596 (Tel: 2062573199)
Registered at 22809 LAKEVIEW DR APT E302, MOUNTLAKE TERRACE, WA 980432880
Recorded as SYDNEY CASTLE
Social Worker (License #61674183 in WA)
First registered as active Individual Practitioner in NPPES Database.
Patient & Community Reviews
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NPI Administrative Meta
Mailing Address
22809 Lakeview Dr Apt E302
Mountlake Terrace, WA 980432880
This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.