DR. ALEXANDER L FEINSTEIN MD
NPI 1306850367
Radiology - Diagnostic Radiology in Boston, MA
About Dr. Alexander L Feinstein Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ALEXANDER L FEINSTEIN MD (NPI 1306850367) is an individual diagnostic radiology provider in Boston, Massachusetts, licensed in Massachusetts (220881) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Beth Israel Deaconess Hospital - Needham, and is a graduate of Virginia Commonwealth University, School Of Medicine (2001).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 4
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
Dr. Alexander L Feinstein Md 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
5Medicare enrollment records show Alexander Feinstein reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Milton, MA 02186
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1861216038 (Massachusetts)
- 556 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 1,477 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1275574899 (Massachusetts)
- 2,579 clinicians in this Medicare group
Brighton, MA 02135
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1821349317 (Massachusetts)
- 130 clinicians in this Medicare group
Lawrence, MA 01841
- Reassigned Medicare billing, Massachusetts enrollment
- 29 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 84
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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Beth Israel Deaconess Hospital - Needham
Acute Care Hospitals · Needham, MABeth Israel Deaconess Medical Center
Acute Care Hospitals · Boston, MASouth Shore Hospital
Acute Care Hospitals · South Weymouth, MABeth Israel Deaconess Hospital - Milton
Acute Care Hospitals · Milton, MABrigham And Women's Hospital
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02124 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
DORCHESTER, MA 02124
DORCHESTER CENTER, MA 02124
DORCHESTER CENTER, MA 02124
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 Alexander Feinstein's NPI number?
The NPI number for Alexander Feinstein is 1306850367. It was assigned to this individual provider in the NPPES registry on July 27, 2006.
Where is Alexander Feinstein located?
Alexander Feinstein practices at 2100 Dorchester Ave, Boston, MA 02124. The listed phone number is (617) 296-4000.
What is Alexander Feinstein's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Alexander Feinstein enrolled in Medicare?
Yes. Alexander Feinstein 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 Alexander Feinstein's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alexander Feinstein reassigns Medicare benefits to 5 organizations: Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (Milton, MA), Beth Israel Deaconess Medical Center, Inc. (Boston, MA), Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (Boston, MA), Steward Medical Group, Inc (Brighton, MA) and L & M Radiology, Inc. (Lawrence, MA). 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 Alexander Feinstein's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Alexander Feinstein affiliated with any hospitals?
According to CMS data, Alexander Feinstein is affiliated with Beth Israel Deaconess Hospital - Needham, Beth Israel Deaconess Medical Center, South Shore Hospital, Beth Israel Deaconess Hospital - Milton and Brigham And Women's Hospital.
When was this NPI record last updated?
The NPPES record for Alexander Feinstein was last updated on May 29, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.