Mark Nassau, M.A. PSY
NPI 1679902779 · Mental Health Counselor · Enfield, CT
Mark Nassau, M.A. PSY is a Mental Health Counselor provider in Enfield, CT (NPI 1679902779).
Provider details
- NPI number
- 1679902779
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- M.A. PSY
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Behavioral Health & Social Service Providers
- School Counselor101YS0200X
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
12 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2013-11-08
- Last updated
- 2013-11-08
Frequently asked questions
- What is Mark Nassau's NPI number?
- Mark Nassau's National Provider Identifier (NPI) is 1679902779, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Nassau's specialty?
- Mark Nassau is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Mark Nassau located?
- Mark Nassau's practice location on file with NPPES is 23 Burnham St, Enfield, CT 06082-6144.
- What is Mark Nassau's phone number?
- The practice phone number listed in the NPPES registry for Mark Nassau is (860) 543-9775.
- Is Mark Nassau's NPI active?
- Yes — Mark Nassau's NPI (1679902779) is active in the NPPES registry as of the last update on 2013-11-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.