IndividualActive
Darren Brennan, PSYD
NPI 1770666000 · Clinical Psychologist · Reston, VA
Darren Brennan, PSYD is a Clinical Psychologist provider in Reston, VA (NPI 1770666000).
Provider details
- NPI number
- 1770666000
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSYD
- Sex
- Male
- Sole proprietor
- No
- License
- 0810005104 (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
1801 Robert Fulton Dr Ste 230
Reston, VA 20191-5461
Phone: (703) 391-9410
Fax: (703) 476-7634
Street-level locationGet directions
Mailing address
1801 Robert Fulton Dr Ste 230
Reston, VA 20191-5461
Registry dates
- Enumerated
- 2006-10-23
- Last updated
- 2023-11-27
- Certified
- 2023-11-27
Frequently asked questions
- What is Darren Brennan's NPI number?
- Darren Brennan's National Provider Identifier (NPI) is 1770666000, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Darren Brennan's specialty?
- Darren Brennan is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Darren Brennan located?
- Darren Brennan's practice location on file with NPPES is 1801 Robert Fulton Dr Ste 230, Reston, VA 20191-5461.
- What is Darren Brennan's phone number?
- The practice phone number listed in the NPPES registry for Darren Brennan is (703) 391-9410.
- Is Darren Brennan's NPI active?
- Yes — Darren Brennan's NPI (1770666000) is active in the NPPES registry as of the last update on 2023-11-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.