Mark Jefferson, MFTI
NPI 1285160572 · Marriage & Family Therapist · San Mateo, CA
Mark Jefferson, MFTI is a Marriage & Family Therapist provider in San Mateo, CA (NPI 1285160572).
Provider details
- NPI number
- 1285160572
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- MFTI
- Sex
- Male
- Sole proprietor
- Yes
- License
- IMF98404 (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
9 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
- 2017-05-04
- Last updated
- 2017-05-04
Frequently asked questions
- What is Mark Jefferson's NPI number?
- Mark Jefferson's National Provider Identifier (NPI) is 1285160572, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Jefferson's specialty?
- Mark Jefferson is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Mark Jefferson located?
- Mark Jefferson's practice location on file with NPPES is 126 W 25th Ave, San Mateo, CA 94403-2208.
- What is Mark Jefferson's phone number?
- The practice phone number listed in the NPPES registry for Mark Jefferson is (510) 409-5391.
- Is Mark Jefferson's NPI active?
- Yes — Mark Jefferson's NPI (1285160572) is active in the NPPES registry as of the last update on 2017-05-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.