William Mendoza
NPI 1669116745 · Addiction (Substance Use Disorder) Counselor · Los Angeles, CA
William Mendoza is a Addiction (Substance Use Disorder) Counselor provider in Los Angeles, CA (NPI 1669116745).
Provider details
- NPI number
- 1669116745
- 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
4 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
- 2022-04-25
- Last updated
- 2022-04-25
- Certified
- 2022-04-25
Frequently asked questions
- What is William Mendoza's NPI number?
- William Mendoza's National Provider Identifier (NPI) is 1669116745, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Mendoza's specialty?
- William Mendoza is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is William Mendoza located?
- William Mendoza's practice location on file with NPPES is 360 S Westlake Ave, Los Angeles, CA 90057-2906.
- What is William Mendoza's phone number?
- The practice phone number listed in the NPPES registry for William Mendoza is (213) 483-9201.
- Is William Mendoza's NPI active?
- Yes — William Mendoza's NPI (1669116745) is active in the NPPES registry as of the last update on 2022-04-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.