ROBERT GREENBERG
NPI 1780348425
Social Worker in Wellesley, MA
About Robert Greenberg NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ROBERT GREENBERG (NPI 1780348425) is an individual social worker in Wellesley, Massachusetts and active in the NPI registry since October 2021. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Robert Greenberg is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Robert Greenberg reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Wellesley, MA 02481
- Reassigned Medicare billing, Massachusetts enrollment
- 14 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WELLESLEY, MA 02481
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Robert Greenberg's NPI number?
The NPI number for Robert Greenberg is 1780348425. It was assigned to this individual provider in the NPPES registry on October 28, 2021.
Where is Robert Greenberg located?
Robert Greenberg practices at 11 Chapel Pl, Wellesley, MA 02481. The listed phone number is (617) 564-3217.
What is Robert Greenberg's specialty?
The primary specialty registered for this NPI is Social Worker with taxonomy code 104100000X.
Is Robert Greenberg enrolled in Medicare?
Yes. Robert Greenberg is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Robert Greenberg's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Robert Greenberg reassigns Medicare benefits to Human Relations Service Inc (Wellesley, MA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Robert Greenberg's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Robert Greenberg was last updated on September 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 50 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Robert Greenberg · NPI 1780348425
Social Worker provider in Wellesley, Massachusetts. Individual provider, active in the CMS NPPES registry since October 28, 2021.
## Identity
- **NPI:** 1780348425 (Entity type: Individual)
- **Enumerated:** October 28, 2021
- **Primary specialty:** Social Worker · taxonomy 104100000X
- **Sole proprietor:** Yes
## Practice location
- **Address:** 11 CHAPEL PL, Wellesley, MA 02481-3130
- **Phone:** (617) 564-3217
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Human Relations Service Inc (NPI 1750301966, Wellesley, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 8, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1780348425) · Data from the CMS NPPES public registry.