Matt Greenberg, LCSW
NPI 1659651800 · Clinical Social Worker · Stamford, CT
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matt Greenberg, LCSW is a Clinical Social Worker provider in Stamford, CT (NPI 1659651800).
Provider details
- NPI number
- 1659651800
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- No
- License
- 000675 (CT)
Specialties & taxonomies
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
14 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
- 2011-08-19
- Last updated
- 2023-12-07
- Certified
- 2023-12-07
Frequently asked questions
- What is Matt Greenberg's NPI number?
- Matt Greenberg's National Provider Identifier (NPI) is 1659651800, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matt Greenberg's specialty?
- Matt Greenberg is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Matt Greenberg located?
- Matt Greenberg's practice location on file with NPPES is 196 Greyrock Pl, Stamford, CT 06901-2006.
- What is Matt Greenberg's phone number?
- The practice phone number listed in the NPPES registry for Matt Greenberg is (203) 921-4161.
- Does Matt Greenberg accept Medicare?
- Matt Greenberg is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matt Greenberg's NPI active?
- Yes — Matt Greenberg's NPI (1659651800) is active in the NPPES registry as of the last update on 2023-12-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.