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

Mrs. Catherine Grellas, RN, MFTINTERN

Individual provider Mental Health Counselor · NPI 1730475021

Mrs. Catherine Grellas, RN, MFTINTERN is a Mental Health Counselor in San Mateo, California. Licensed in California. Registered with an NPI since 2011.

Licensed in
CA
In the registry since
2011
What do these letters mean?
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.

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Practice location Address checks out

36 37th Ave
San Mateo, CA 94403-4405
Phone: (650) 295-2160
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Mental Health Counselor (primary) Taxonomy 101YM0800X (CA)

Record details

NPI number1730475021
Entity typeIndividual (Type 1)
GenderFemale
Credentials RN , MFTINTERN
Sole proprietorNo
NPI enumeratedJune 24, 2011
Last updated in NPPESJune 24, 2011

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