William Johnston
NPI 1699648972 · Student in an Organized Health Care Education/Training Program · Garden Grove, CA
William Johnston is a Student in an Organized Health Care Education/Training Program provider in Garden Grove, CA (NPI 1699648972).
Provider details
- NPI number
- 1699648972
- Entity type
- Individual
- Primary specialty
- Student in an Organized Health Care Education/Training ProgramStudent, Health Care
- Sex
- Male
- Sole proprietor
- Yes
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
Under 1 yr in 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
- 2025-09-24
- Last updated
- 2025-10-20
- Certified
- 2025-10-20
Frequently asked questions
- What is William Johnston's NPI number?
- William Johnston's National Provider Identifier (NPI) is 1699648972, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Johnston's specialty?
- William Johnston 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 Johnston located?
- William Johnston's practice location on file with NPPES is 12141 Brookhurst St Ste 101, Garden Grove, CA 92840-2865.
- What is William Johnston's phone number?
- The practice phone number listed in the NPPES registry for William Johnston is (714) 296-1934.
- Is William Johnston's NPI active?
- Yes — William Johnston's NPI (1699648972) is active in the NPPES registry as of the last update on 2025-10-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.