Glenn Horwitz, PH.D.
NPI 1437335734 · Clinical Psychologist · Fairfax, VA
Glenn Horwitz, PH.D. is a Clinical Psychologist provider in Fairfax, VA (NPI 1437335734).
Provider details
- NPI number
- 1437335734
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 0810003784 (VA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
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
18 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 documented practice locations
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
Additional practice locations (2)
- 9518c Lee HwyFairfax, VA 22031Phone: (571) 438-2992
- 18235 Foundry RdPurcellville, VA 20132-4077Phone: (571) 438-2992
Registry dates
- Enumerated
- 2008-01-16
- Last updated
- 2019-02-06
Frequently asked questions
- What is Glenn Horwitz's NPI number?
- Glenn Horwitz's National Provider Identifier (NPI) is 1437335734, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Glenn Horwitz's specialty?
- Glenn Horwitz is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Glenn Horwitz located?
- Glenn Horwitz's practice location on file with NPPES is 9518c Lee Hwy, Fairfax, VA 22031.
- What is Glenn Horwitz's phone number?
- The practice phone number listed in the NPPES registry for Glenn Horwitz is (571) 438-2992.
- Is Glenn Horwitz's NPI active?
- Yes — Glenn Horwitz's NPI (1437335734) is active in the NPPES registry as of the last update on 2019-02-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.