William Brennan
NPI 1821989047 · Student in an Organized Health Care Education/Training Program · Lake View Terrace, CA
William Brennan is a Student in an Organized Health Care Education/Training Program provider in Lake View Terrace, CA (NPI 1821989047).
Provider details
- NPI number
- 1821989047
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Sex
- Male
- Sole proprietor
- No
- License
- 390200000X (CA)
Specialties & taxonomies
- Student in an Organized Health Care Education/Training ProgramPrimary390200000XLicense 390200000X (CA)
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in 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
- 2025-07-15
- Last updated
- 2025-07-15
- Certified
- 2025-07-15
Frequently asked questions
- What is William Brennan's NPI number?
- William Brennan's National Provider Identifier (NPI) is 1821989047, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Brennan's specialty?
- William Brennan is listed in the NPPES registry with a primary specialty of Student in an Organized Health Care Education/Training Program (Student, Health Care).
- Where is William Brennan located?
- William Brennan's practice location on file with NPPES is 11600 Eldridge Ave, Lake View Terrace, CA 91342-6506.
- What is William Brennan's phone number?
- The practice phone number listed in the NPPES registry for William Brennan is (888) 671-9392.
- Is William Brennan's NPI active?
- Yes — William Brennan's NPI (1821989047) is active in the NPPES registry as of the last update on 2025-07-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.