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

MS. Cassandra Olsen

Individual provider Social Worker · NPI 1225425788

MS. Cassandra Olsen is a Social Worker in Mount Vernon, Washington. Registered with an NPI since 2015.

In the registry since
2015

Practice location Address checks out

209 Milwaukee St
Mount Vernon, WA 98273-4200
Phone: (360) 419-7500
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Social Worker (primary) Taxonomy 104100000X

Record details

NPI number1225425788
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorNo
NPI enumeratedApril 22, 2015
Last updated in NPPESApril 22, 2015
Mailing addressPo Box 3810, Everett, WA 98213-8810

Other providers in Mount Vernon