Anthony Mascarenas
NPI 1134356538 · Addiction (Substance Use Disorder) Counselor · San Leandro, CA
Anthony Mascarenas is a Addiction (Substance Use Disorder) Counselor provider in San Leandro, CA (NPI 1134356538).
Provider details
- NPI number
- 1134356538
- 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
17 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
- 2009-06-12
- Last updated
- 2009-06-12
Frequently asked questions
- What is Anthony Mascarenas's NPI number?
- Anthony Mascarenas's National Provider Identifier (NPI) is 1134356538, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Anthony Mascarenas's specialty?
- Anthony Mascarenas is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Anthony Mascarenas located?
- Anthony Mascarenas's practice location on file with NPPES is 2035 Fairmont Dr, San Leandro, CA 94578-1088.
- What is Anthony Mascarenas's phone number?
- The practice phone number listed in the NPPES registry for Anthony Mascarenas is (510) 346-7939.
- Is Anthony Mascarenas's NPI active?
- Yes — Anthony Mascarenas's NPI (1134356538) is active in the NPPES registry as of the last update on 2009-06-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.