CAREN EVE GREENSTEIN M.D.
NPI 1811930910
Radiology - Diagnostic Radiology in White Plains, NY
About Caren Eve Greenstein M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CAREN EVE GREENSTEIN M.D. (NPI 1811930910) is an individual diagnostic radiology provider in White Plains, New York, licensed in Connecticut (032719) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS, is affiliated with St Joseph's Medical Center, and is a graduate of Albert Einstein College Of Medicine Of Yeshiva University (1984).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Caren Eve Greenstein M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
8Medicare enrollment records show Caren Greenstein reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
White Plains, NY 10601
- Reassigned Medicare billing, New York enrollment
- 479 clinicians in this Medicare group
White Plains, NY 10601
- Reassigned Medicare billing, New York enrollment
- 445 clinicians in this Medicare group
White Plains, NY 10601
- Reassigned Medicare billing, New York enrollment
- 54 clinicians in this Medicare group
Bronx, NY 10467
- Reassigned Medicare billing, New York enrollment
- 5,251 clinicians in this Medicare group
Norwalk, CT 06850
- Reassigned Medicare billing, Connecticut enrollment
- 60 clinicians in this Medicare group
Danbury, CT 06810
- Reassigned Medicare billing, Connecticut enrollment
- 39 clinicians in this Medicare group
Danbury, CT 06810
- Reassigned Medicare billing, Connecticut enrollment
- 23 clinicians in this Medicare group
Hartford, CT 06105
- Reassigned Medicare billing, Connecticut enrollment
- 56 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.
Areas of Expertise CMS Part B claims 17
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
St Joseph's Medical Center
Acute Care Hospitals · Yonkers, NYWhite Plains Hospital Center
Acute Care Hospitals · White Plains, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10601 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
WHITE PLAINS, NY 10601
WHITE PLAINS, NY 10601
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 Caren Greenstein's NPI number?
The NPI number for Caren Greenstein is 1811930910. It was assigned to this individual provider in the NPPES registry on June 14, 2006.
Where is Caren Greenstein located?
Caren Greenstein practices at 41 E Post Rd White Plains Hospital, White Plains, NY 10601. The listed phone number is (914) 681-2929.
What is Caren Greenstein's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Caren Greenstein enrolled in Medicare?
Yes. Caren Greenstein is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Caren Greenstein's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Caren Greenstein reassigns Medicare benefits to 8 organizations: East Post Road Medical Services PC (White Plains, NY), White Plains Physician Services PC (White Plains, NY), White Plains Hospital Medical Center (White Plains, NY), Montefiore Medical Center (Bronx, NY), Premier Imaging LLC (Norwalk, CT) and 3 more organizations, listed in the Medicare section above. Each 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 Caren Greenstein's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Caren Greenstein accept?
Health plans from Anthem Blue Cross and Blue Shield list Caren Greenstein as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Caren Greenstein affiliated with any hospitals?
According to CMS data, Caren Greenstein is affiliated with St Joseph's Medical Center and White Plains Hospital Center.
When was this NPI record last updated?
The NPPES record for Caren Greenstein was last updated on February 4, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 years 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.
# Caren Eve Greenstein, M.D. · NPI 1811930910
Diagnostic Radiology physician in White Plains, New York. Individual provider, active in the CMS NPPES registry since June 14, 2006.
## Identity
- **NPI:** 1811930910 (Entity type: Individual)
- **Enumerated:** June 14, 2006
- **Primary specialty:** Radiology - Diagnostic Radiology · taxonomy 2085R0202X
- **State license:** 032719 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 41 E POST RD, WHITE PLAINS HOSPITAL, White Plains, NY 10601-4607
- **Phone:** (914) 681-2929
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 8 organizations under Medicare reassignment (form CMS-855R): East Post Road Medical Services PC (NPI 1841767274, White Plains, NY); White Plains Physician Services PC (NPI 1124502687, White Plains, NY); White Plains Hospital Medical Center (NPI 1083975056, White Plains, NY); Montefiore Medical Center (NPI 1063525152, Bronx, NY); Premier Imaging LLC (NPI 1760087027, Norwalk, CT); and 3 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Albert Einstein College Of Medicine Of Yeshiva University, class of 1984
## Record status
- **NPPES last updated:** February 4, 2015
- **Other identifiers:** Medicare UPIN E87430 (CT)
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Source: [NPI Profile](https://npiprofile.com/npi/1811930910) · Data from the CMS NPPES public registry.