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

Individual provider Social Worker · NPI 1659080695

Hasmig Tatiossian, LCSW is a Clinical Social Worker in Santa Rosa, California. Qualified in 2020, 6 years ago. Practices with County of Sonoma, a 30-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
6
Licensed in
CA
In the registry since
2022
What do these letters mean?
LCSW — Licensed Clinical Social Worker
A social worker licensed to diagnose and treat mental health conditions independently.

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Practice location Address checks out

2225 Challenger Way
Santa Rosa, CA 95407-5441
Phone: (707) 565-6900
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Social Worker (primary) Taxonomy 104100000X · Licence 125498 (CA)

Record details

NPI number1659080695
Entity typeIndividual (Type 1)
GenderFemale
Credentials LCSW
Sole proprietorNo
NPI enumeratedNovember 18, 2022
Last updated in NPPESJanuary 14, 2026
Certification dateJanuary 14, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL SOCIAL WORKER
Medical schoolOTHER
Graduated 2020 (6 years in practice)
Group practice County Of Sonoma — 30 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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