IndividualActive
William Clark, PHD
NPI 1972716702 · Clinical Psychologist · Vienna, VA
William Clark, PHD is a Clinical Psychologist provider in Vienna, VA (NPI 1972716702).
Provider details
- NPI number
- 1972716702
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 0810002215 (VA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(90/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs 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
2110 Gallows Rd # B
Vienna, VA 22182-3962
Phone: (703) 506-8378
Fax: (703) 893-1011
Street-level locationGet directions
Mailing address
1514 Thurber St
Herndon, VA 20170-2565
Registry dates
- Enumerated
- 2007-05-08
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Clark's NPI number?
- William Clark's National Provider Identifier (NPI) is 1972716702, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Clark's specialty?
- William Clark is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is William Clark located?
- William Clark's practice location on file with NPPES is 2110 Gallows Rd # B, Vienna, VA 22182-3962.
- What is William Clark's phone number?
- The practice phone number listed in the NPPES registry for William Clark is (703) 506-8378.
- Is William Clark's NPI active?
- Yes — William Clark's NPI (1972716702) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.