ROBERT E GERSZTEN MD
NPI 1235184573
Internal Medicine - Cardiovascular Disease in Boston, MA
About Robert E Gerszten Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ROBERT E GERSZTEN MD (NPI 1235184573) is an individual cardiovascular disease provider in Boston, Massachusetts, licensed in Massachusetts (77859) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Beth Israel Deaconess Medical Center, and is a graduate of Johns Hopkins University School Of Medicine (1989).
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 and accepts Medicare assignment
Robert E Gerszten 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
2Medicare enrollment records show Robert Gerszten reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 1,477 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 2,579 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 2
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Beth Israel Deaconess Medical Center
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02114 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Gerszten's NPI number?
The NPI number for Robert Gerszten is 1235184573. It was assigned to this individual provider in the NPPES registry on May 24, 2006.
Where is Robert Gerszten located?
Robert Gerszten practices at 32 Fruit Street Cardiology - Yawkey Outpatient Center, Boston, MA 02114. The listed phone number is (617) 726-6760.
What is Robert Gerszten's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.
Is Robert Gerszten enrolled in Medicare?
Yes. Robert Gerszten 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 Robert Gerszten's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Robert Gerszten reassigns Medicare benefits to 2 organizations: Beth Israel Deaconess Medical Center, Inc. (Boston, MA) and Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (Boston, 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 Robert Gerszten's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Robert Gerszten affiliated with any hospitals?
According to CMS data, Robert Gerszten is affiliated with Beth Israel Deaconess Medical Center.
When was this NPI record last updated?
The NPPES record for Robert Gerszten was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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 E Gerszten, MD · NPI 1235184573
Cardiovascular Disease physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since May 24, 2006.
## Identity
- **NPI:** 1235184573 (Entity type: Individual)
- **Enumerated:** May 24, 2006
- **Primary specialty:** Internal Medicine - Cardiovascular Disease · taxonomy 207RC0000X
- **State license:** 77859 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 32 FRUIT STREET, CARDIOLOGY - YAWKEY OUTPATIENT CENTER, Boston, MA 02114-2620
- **Phone:** (617) 726-6760
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Beth Israel Deaconess Medical Center, Inc. (NPI 1548202641, Boston, MA); Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (NPI 1194765438, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Johns Hopkins University School Of Medicine, class of 1989
## Record status
- **NPPES last updated:** July 13, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1235184573) · Data from the CMS NPPES public registry.