James Williamson
NPI 1174934012 · Addiction (Substance Use Disorder) Counselor · South San Francisco, CA
James Williamson is a Addiction (Substance Use Disorder) Counselor provider in South San Francisco, CA (NPI 1174934012).
Provider details
- NPI number
- 1174934012
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
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
12 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2014-05-14
- Last updated
- 2014-05-14
Frequently asked questions
- What is James Williamson's NPI number?
- James Williamson's National Provider Identifier (NPI) is 1174934012, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Williamson's specialty?
- James Williamson is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is James Williamson located?
- James Williamson's practice location on file with NPPES is 301 Grand Ave Ste 301, South San Francisco, CA 94080-3641.
- What is James Williamson's phone number?
- The practice phone number listed in the NPPES registry for James Williamson is (650) 244-1447.
- Is James Williamson's NPI active?
- Yes — James Williamson's NPI (1174934012) is active in the NPPES registry as of the last update on 2014-05-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.