Maxfield Williams
NPI 1255911707 · Addiction (Substance Use Disorder) Counselor · San Francisco, CA
Maxfield Williams is a Addiction (Substance Use Disorder) Counselor provider in San Francisco, CA (NPI 1255911707).
Provider details
- NPI number
- 1255911707
- 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
5 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
- 2021-04-09
- Last updated
- 2021-04-09
- Certified
- 2021-04-09
Frequently asked questions
- What is Maxfield Williams's NPI number?
- Maxfield Williams's National Provider Identifier (NPI) is 1255911707, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maxfield Williams's specialty?
- Maxfield Williams is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Maxfield Williams located?
- Maxfield Williams's practice location on file with NPPES is 1563 Mission St, San Francisco, CA 94103-2543.
- What is Maxfield Williams's phone number?
- The practice phone number listed in the NPPES registry for Maxfield Williams is (415) 762-3700.
- Is Maxfield Williams's NPI active?
- Yes — Maxfield Williams's NPI (1255911707) is active in the NPPES registry as of the last update on 2021-04-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.