William Johnston, PSYD
NPI 1588457626 · Clinical Psychologist · Front Royal, VA
William Johnston, PSYD is a Clinical Psychologist provider in Front Royal, VA (NPI 1588457626).
Provider details
- NPI number
- 1588457626
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSYD
- Sex
- Male
- Sole proprietor
- No
- License
- 0805002661 (VA)
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
1 yr in NPPES 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
- 2025-05-22
- Last updated
- 2025-06-27
- Certified
- 2025-06-02
Frequently asked questions
- What is William Johnston's NPI number?
- William Johnston's National Provider Identifier (NPI) is 1588457626, 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 Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is William Johnston located?
- William Johnston's practice location on file with NPPES is 316 Warren Ave, Front Royal, VA 22630-4483.
- What is William Johnston's phone number?
- The practice phone number listed in the NPPES registry for William Johnston is (202) 670-2407.
- Is William Johnston's NPI active?
- Yes — William Johnston's NPI (1588457626) is active in the NPPES registry as of the last update on 2025-06-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.