Mental Health Therapist

Mrs. Catherine Grellas, RN, MFT INTERN

36 37th Ave, San Mateo, California, 94403-4405

About Mrs. Catherine Grellas

Mrs. Catherine Grellas is a therapist based in San Mateo, California who is specialized in Mental Health Counselor. Her current practice location is 36 37th Ave, San Mateo. Patients can reach her at 650-295-2160. Mrs. Catherine Grellas is RN, MFT INTERN in Mental Health Counselor and her NPI number (Unique professional ID assigned by NPPES) is 1730475021.

Mrs. Catherine Grellas is a licensed professional who helps individuals, couples, and families manage and overcome emotional, psychological, and behavioral challenges. She assess clients’ mental health conditions and develop personalized treatment plans to provide therapy for a range of mental health issues, including anxiety, depression, trauma, relationship issues, stress, grief, and life transitions.

Practice Information

Mrs. Catherine Grellas speciality, credentials, practice address, contact phone number and fax are as below. Patients can call on the below given phone number for appointment.

Provider Name Mrs. Catherine Grellas
Specialization Mental Health Counselor
Credentials RN, MFT INTERN
Gender Female
Practice Address: 36 37th Ave,
San Mateo, CA - 94403-4405

Professional Identification Codes

NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to health care providers in the United States by the Centers for Medicare and Medicaid Services (CMS). NPI details are as mentioned below.

NPI Number1730475021
NPI Enumeration Date: 24 Jun, 2011
NPI Last Update On: 24 Jun, 2011

Medical Licenses:

Healthcare professionals can hold one or more medical licenses for different specialities in the same state or different states. Related medical licenses for Mrs. Catherine Grellas are as mentioned below.

License NumberSpecializationStateStatus
Mental Health Counselor CaliforniaPrimary

Other Medical Identifiers

Other legacy medical identifiers associated with Mrs. Catherine Grellas such as Medicaid, Medicare PIN, NSC, UPIN etc. are mentioned as below.
IdentifierTypeStateIssuer
1679619910OtherCaliforniaCATHOLIC CHARITIES CYO

Mailing Address

Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned Practice address.

Mrs. Catherine Grellas
Po Box 934,
San Carlos, CA - 94070-0934
Phone: 650-208-3997

Book an Appointment with Mrs. Catherine Grellas

To schedule an appointment, contact Mrs. Catherine Grellas at 36 37th Ave, San Mateo, California or call on below stated phone number.

Call to Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Mrs. Catherine Grellas:

Mrs. Catherine Grellas is a therapist specializing in Mental Health Counselor. She is a licensed professional who helps individuals, couples, and families manage and overcome emotional, psychological, and behavioral challenges. She assess clients’ mental health conditions and develop personalized treatment plans to provide therapy for a range of mental health issues, including anxiety, depression, trauma, relationship issues, stress, grief, and life transitions.

Yes, Mrs. Catherine Grellas is currently accepting new patients. To schedule an appointment, contact the office directly and schedule an appointment.

Mrs. Catherine Grellas practices at 36 37th Ave, San Mateo, California, 94403-4405.

To schedule an appointment with Mrs. Catherine Grellas, please contact the office at 650-295-2160.

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**Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 14 September, 2026.