DR. BARRET ZIMMERMAN MD
NPI 1033735584
Emergency Medicine in Bronx, NY
About Dr. Barret Zimmerman Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. BARRET ZIMMERMAN MD (NPI 1033735584) is an individual emergency medicine provider in Bronx, New York, licensed in New York (343878) and active in the NPI registry since June 2020. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Barret Zimmerman Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show Barret Zimmerman reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Bronx, NY 10467
- Reassigned Medicare billing, New York enrollment
- 5,251 clinicians in this Medicare group
Northampton, MA 01060
- Reassigned Medicare billing, Massachusetts enrollment
- 539 clinicians in this Medicare group
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 4,574 clinicians in this Medicare group
Oak Bluffs, MA 02557
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1194866210 (Massachusetts)
- 184 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10467 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.
BRONX, NY 10467
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 Barret Zimmerman's NPI number?
The NPI number for Barret Zimmerman is 1033735584. It was assigned to this individual provider in the NPPES registry on June 21, 2020.
Where is Barret Zimmerman located?
Barret Zimmerman practices at 111 E 210th St, Bronx, NY 10467. The listed phone number is (718) 920-4321.
What is Barret Zimmerman's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Barret Zimmerman enrolled in Medicare?
Yes. Barret Zimmerman is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Barret Zimmerman's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Barret Zimmerman reassigns Medicare benefits to 4 organizations: Montefiore Medical Center (Bronx, NY), Mass General Brigham Medical Group Western Massachusetts Inc (Northampton, MA), Brigham & Womens Physicians Organization Inc (Boston, MA) and Martha's Vineyard Hospital, Inc. (Oak Bluffs, 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 Barret Zimmerman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Barret Zimmerman accept?
Health plans from Taro Health list Barret Zimmerman 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.
When was this NPI record last updated?
The NPPES record for Barret Zimmerman was last updated on September 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 36 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.
# Dr. Barret Zimmerman, MD · NPI 1033735584
Emergency Medicine physician in Bronx, New York. Individual provider, active in the CMS NPPES registry since June 21, 2020.
## Identity
- **NPI:** 1033735584 (Entity type: Individual)
- **Enumerated:** June 21, 2020
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 343878 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 111 E 210TH ST, Bronx, NY 10467-2401
- **Phone:** (718) 920-4321
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Montefiore Medical Center (NPI 1063525152, Bronx, NY); Mass General Brigham Medical Group Western Massachusetts Inc (NPI 1295787919, Northampton, MA); Brigham & Womens Physicians Organization Inc (NPI 1033535497, Boston, MA); Martha's Vineyard Hospital, Inc. (NPI 1134206386, Oak Bluffs, MA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 28, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1033735584) · Data from the CMS NPPES public registry.