Lois Mark, LCSW
NPI 1215077730 · Marriage & Family Therapist · San Mateo, CA
Lois Mark, LCSW is a Marriage & Family Therapist provider in San Mateo, CA (NPI 1215077730).
Provider details
- NPI number
- 1215077730
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- No
- License
- LCS638 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
- 2007-02-07
- Last updated
- 2025-09-11
Frequently asked questions
- What is Lois Mark's NPI number?
- Lois Mark's National Provider Identifier (NPI) is 1215077730, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lois Mark's specialty?
- Lois Mark is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Lois Mark located?
- Lois Mark's practice location on file with NPPES is 327 N San Mateo Dr, San Mateo, CA 94401-2585.
- What is Lois Mark's phone number?
- The practice phone number listed in the NPPES registry for Lois Mark is (650) 344-5162.
- Is Lois Mark's NPI active?
- Yes — Lois Mark's NPI (1215077730) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.