IndividualActive
Samantha Johnston
NPI 1801912209 · Clinical Social Worker · San Mateo, CA
Samantha Johnston is a Clinical Social Worker provider in San Mateo, CA (NPI 1801912209).
Provider details
- NPI number
- 1801912209
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- No
- License
- LCSW26273 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(89/100 index)
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
31 Tower Road
San Mateo, CA 94402
Phone: (650) 312-5320
Fax: (650) 572-2414
Street-level locationGet directions
Mailing address
1 Davis Drive
Belmont, CA 94002
Registry dates
- Enumerated
- 2007-03-21
- Last updated
- 2020-01-29
- Certified
- 2020-01-29
Frequently asked questions
- What is Samantha Johnston's NPI number?
- Samantha Johnston's National Provider Identifier (NPI) is 1801912209, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Samantha Johnston's specialty?
- Samantha Johnston is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Samantha Johnston located?
- Samantha Johnston's practice location on file with NPPES is 31 Tower Road, San Mateo, CA 94402.
- What is Samantha Johnston's phone number?
- The practice phone number listed in the NPPES registry for Samantha Johnston is (650) 312-5320.
- Is Samantha Johnston's NPI active?
- Yes — Samantha Johnston's NPI (1801912209) is active in the NPPES registry as of the last update on 2020-01-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.