Catherine Grellas, RN, MFT INTERN
NPI 1730475021 · Mental Health Counselor · San Mateo, CA
Catherine Grellas, RN, MFT INTERN is a Mental Health Counselor provider in San Mateo, CA (NPI 1730475021).
Provider details
- NPI number
- 1730475021
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- RN, MFT INTERN
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
15 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-06-24
- Last updated
- 2011-06-24
Frequently asked questions
- What is Catherine Grellas's NPI number?
- Catherine Grellas's National Provider Identifier (NPI) is 1730475021, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Catherine Grellas's specialty?
- Catherine Grellas is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Catherine Grellas located?
- Catherine Grellas's practice location on file with NPPES is 36 37th Ave, San Mateo, CA 94403-4405.
- What is Catherine Grellas's phone number?
- The practice phone number listed in the NPPES registry for Catherine Grellas is (650) 295-2160.
- Is Catherine Grellas's NPI active?
- Yes — Catherine Grellas's NPI (1730475021) is active in the NPPES registry as of the last update on 2011-06-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.