Derrick Williams
NPI 1326731720 · Addiction (Substance Use Disorder) Counselor · San Francisco, CA
Derrick Williams is a Addiction (Substance Use Disorder) Counselor provider in San Francisco, CA (NPI 1326731720).
Provider details
- NPI number
- 1326731720
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
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
3 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
- 2023-05-31
- Last updated
- 2023-05-31
- Certified
- 2023-05-31
Frequently asked questions
- What is Derrick Williams's NPI number?
- Derrick Williams's National Provider Identifier (NPI) is 1326731720, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Derrick Williams's specialty?
- Derrick Williams is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Derrick Williams located?
- Derrick Williams's practice location on file with NPPES is 1035 Market St, San Francisco, CA 94103-1600.
- What is Derrick Williams's phone number?
- The practice phone number listed in the NPPES registry for Derrick Williams is (415) 487-3000.
- Is Derrick Williams's NPI active?
- Yes — Derrick Williams's NPI (1326731720) is active in the NPPES registry as of the last update on 2023-05-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.