William Holman
NPI 1659095198 · Addiction (Substance Use Disorder) Counselor · San Mateo, CA
William Holman is a Addiction (Substance Use Disorder) Counselor provider in San Mateo, CA (NPI 1659095198).
Provider details
- NPI number
- 1659095198
- 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
- 2022-09-28
- Last updated
- 2022-09-28
- Certified
- 2022-09-28
Frequently asked questions
- What is William Holman's NPI number?
- William Holman's National Provider Identifier (NPI) is 1659095198, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Holman's specialty?
- William Holman is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is William Holman located?
- William Holman's practice location on file with NPPES is 416 2nd Ave, San Mateo, CA 94401-3205.
- What is William Holman's phone number?
- The practice phone number listed in the NPPES registry for William Holman is (650) 579-7881.
- Is William Holman's NPI active?
- Yes — William Holman's NPI (1659095198) is active in the NPPES registry as of the last update on 2022-09-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.