Isaac Greenberg, PH.D.
NPI 1558366690 · Clinical Psychologist · Arlington, MA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Isaac Greenberg, PH.D. is a Clinical Psychologist provider in Arlington, MA (NPI 1558366690).
Provider details
- NPI number
- 1558366690
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- License
- PY1628-PR (MA)
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
21 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
- 2005-06-16
- Last updated
- 2007-07-08
Frequently asked questions
- What is Isaac Greenberg's NPI number?
- Isaac Greenberg's National Provider Identifier (NPI) is 1558366690, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Isaac Greenberg's specialty?
- Isaac Greenberg is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Isaac Greenberg located?
- Isaac Greenberg's practice location on file with NPPES is 94 Pleasant St, Arlington, MA 02476-6535.
- What is Isaac Greenberg's phone number?
- The practice phone number listed in the NPPES registry for Isaac Greenberg is (781) 862-9173.
- Does Isaac Greenberg accept Medicare?
- Isaac Greenberg is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Isaac Greenberg's NPI active?
- Yes — Isaac Greenberg's NPI (1558366690) 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.