John Clark
NPI 1699824763 · Addiction (Substance Use Disorder) Counselor · Fairfax, VA
John Clark is a Addiction (Substance Use Disorder) Counselor provider in Fairfax, VA (NPI 1699824763).
Provider details
- NPI number
- 1699824763
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
- License
- 0710101131 (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
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
Mailing address
Registry dates
- Enumerated
- 2007-01-09
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Clark's NPI number?
- John Clark's National Provider Identifier (NPI) is 1699824763, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Clark's specialty?
- John Clark is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is John Clark located?
- John Clark's practice location on file with NPPES is 10390 Democracy Ln, Fairfax, VA 22030-2522.
- What is John Clark's phone number?
- The practice phone number listed in the NPPES registry for John Clark is (703) 219-2578.
- Is John Clark's NPI active?
- Yes — John Clark's NPI (1699824763) 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.