Ernest Williamson
NPI 1649782954 · Addiction (Substance Use Disorder) Counselor · Stockton, CA
Ernest Williamson is a Addiction (Substance Use Disorder) Counselor provider in Stockton, CA (NPI 1649782954).
Provider details
- NPI number
- 1649782954
- 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
8 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
- 2017-10-26
- Last updated
- 2017-10-26
Frequently asked questions
- What is Ernest Williamson's NPI number?
- Ernest Williamson's National Provider Identifier (NPI) is 1649782954, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ernest Williamson's specialty?
- Ernest Williamson is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Ernest Williamson located?
- Ernest Williamson's practice location on file with NPPES is 1111 N El Dorado St, Stockton, CA 95202-1305.
- What is Ernest Williamson's phone number?
- The practice phone number listed in the NPPES registry for Ernest Williamson is (209) 938-0228.
- Is Ernest Williamson's NPI active?
- Yes — Ernest Williamson's NPI (1649782954) is active in the NPPES registry as of the last update on 2017-10-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.