William Matherly, LCSW
NPI 1063776011 · Clinical Social Worker · South San Francisco, CA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Matherly, LCSW is a Clinical Social Worker provider in South San Francisco, CA (NPI 1063776011).
Provider details
- NPI number
- 1063776011
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- Yes
- License
- LCS28240 (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
14 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
- 2012-06-25
- Last updated
- 2022-02-11
Frequently asked questions
- What is William Matherly's NPI number?
- William Matherly's National Provider Identifier (NPI) is 1063776011, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Matherly's specialty?
- William Matherly is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is William Matherly located?
- William Matherly's practice location on file with NPPES is 1200 El Camino Real, South San Francisco, CA 94080.
- What is William Matherly's phone number?
- The practice phone number listed in the NPPES registry for William Matherly is (650) 742-2151.
- Does William Matherly accept Medicare?
- William Matherly is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Matherly's NPI active?
- Yes — William Matherly's NPI (1063776011) is active in the NPPES registry as of the last update on 2022-02-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.