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

Diana Matthiessen, ASW

Individual provider Clinical Social Worker · NPI 1932986916

Diana Matthiessen, ASW is a Clinical Social Worker in Santa Monica, California. Licensed in California. Registered with an NPI since 2023.

Licensed in
CA
In the registry since
2023

Practice location Address checks out

3205 Ocean Park Blvd Ste 250
Santa Monica, CA 90405-3239
Phone: (310) 488-5850
Show map & directions

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

Specialties & licences

Clinical Social Worker (primary) Taxonomy 1041C0700X · Licence 122238 (CA)

Record details

NPI number1932986916
Entity typeIndividual (Type 1)
GenderFemale
Credentials ASW
Sole proprietorNo
NPI enumeratedSeptember 12, 2023
Last updated in NPPESOctober 14, 2025
Certification dateOctober 14, 2025

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