William Castillo
NPI 1841898715 · Student in an Organized Health Care Education/Training Program · San Dimas, CA
William Castillo is a Student in an Organized Health Care Education/Training Program provider in San Dimas, CA (NPI 1841898715).
Provider details
- NPI number
- 1841898715
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 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
- 2020-10-13
- Last updated
- 2020-10-13
- Certified
- 2020-10-13
Frequently asked questions
- What is William Castillo's NPI number?
- William Castillo's National Provider Identifier (NPI) is 1841898715, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Castillo's specialty?
- William Castillo 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 Castillo located?
- William Castillo's practice location on file with NPPES is 762 Cypress St, San Dimas, CA 91773-3505.
- What is William Castillo's phone number?
- The practice phone number listed in the NPPES registry for William Castillo is (909) 599-1227.
- Is William Castillo's NPI active?
- Yes — William Castillo's NPI (1841898715) is active in the NPPES registry as of the last update on 2020-10-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.