Tonia Chen
NPI 1689893257 · Marriage & Family Therapist · San Carlos, CA
Tonia Chen is a Marriage & Family Therapist provider in San Carlos, CA (NPI 1689893257).
Provider details
- NPI number
- 1689893257
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- No
- License
- IMF52359 (CA)
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
19 yrs in NPPES registry
- Profile completeness38% of score
100% 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
- 2007-04-24
- Last updated
- 2007-07-08
Frequently asked questions
- What is Tonia Chen's NPI number?
- Tonia Chen's National Provider Identifier (NPI) is 1689893257, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tonia Chen's specialty?
- Tonia Chen is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Tonia Chen located?
- Tonia Chen's practice location on file with NPPES is 610 Elm St, San Carlos, CA 94070-8401.
- What is Tonia Chen's phone number?
- The practice phone number listed in the NPPES registry for Tonia Chen is (650) 591-9623.
- Is Tonia Chen's NPI active?
- Yes — Tonia Chen's NPI (1689893257) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.