William Stewart, CADC LL
NPI 1851864656 · Addiction (Substance Use Disorder) Counselor · Ventura, CA
William Stewart, CADC LL is a Addiction (Substance Use Disorder) Counselor provider in Ventura, CA (NPI 1851864656).
Provider details
- NPI number
- 1851864656
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Credential
- CADC LL
- Sex
- Male
- Sole proprietor
- Yes
- License
- AII059880618 (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
7 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
- 2019-01-04
- Last updated
- 2019-01-04
Frequently asked questions
- What is William Stewart's NPI number?
- William Stewart's National Provider Identifier (NPI) is 1851864656, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Stewart's specialty?
- William Stewart is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is William Stewart located?
- William Stewart's practice location on file with NPPES is 955 E Thompson Blvd, Ventura, CA 93001-3008.
- What is William Stewart's phone number?
- The practice phone number listed in the NPPES registry for William Stewart is (805) 641-9100.
- Is William Stewart's NPI active?
- Yes — William Stewart's NPI (1851864656) is active in the NPPES registry as of the last update on 2019-01-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.