BRET NELSON MD
NPI 1255309407
Emergency Medicine in New York, NY
About Bret Nelson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
BRET NELSON MD (NPI 1255309407) is an individual emergency medicine provider in New York, New York, licensed in New York (2320701) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS, is affiliated with Mount Sinai Hospital, and is a graduate of State University Of New York At Stony Brook, School Of Medicine (2000).
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
Bret Nelson 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 Bret Nelson reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
New York, NY 10029
- Reassigned Medicare billing, New York enrollment
- 1,067 clinicians in this Medicare group
New York, NY 10029
- Reassigned Medicare billing, New York enrollment
- 325 clinicians in this Medicare group
New York, NY 10024
- Reassigned Medicare billing, New York enrollment
- 245 clinicians in this Medicare group
New York, NY 10017
- Reassigned Medicare billing, New York enrollment
- 208 clinicians in this Medicare group
Elmhurst, NY 11373
- Reassigned Medicare billing, New York enrollment
- 836 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 4
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.
Mount Sinai Hospital
Acute Care Hospitals · New York, NYElmhurst Hospital Center
Acute Care Hospitals · Elmhurst, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10029 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 Bret Nelson's NPI number?
The NPI number for Bret Nelson is 1255309407. It was assigned to this individual provider in the NPPES registry on March 14, 2006.
Where is Bret Nelson located?
Bret Nelson practices at 100th St. And Madison Ave, New York, NY 10029. The listed phone number is (212) 241-0101.
What is Bret Nelson's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Bret Nelson enrolled in Medicare?
Yes. Bret Nelson 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 Bret Nelson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Bret Nelson reassigns Medicare benefits to 5 organizations: Fpa Hospital Based (New York, NY), Icahn School Of Medicine At Mount Sinai (New York, NY), Icahn School Of Medicine At Mount Sinai (New York, NY), Icahn School Of Medicine At Mount Sinai (New York, NY) and Icahn School Of Medicine At Mount Sinai (Elmhurst, NY). 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 Bret Nelson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Bret Nelson affiliated with any hospitals?
According to CMS data, Bret Nelson is affiliated with Mount Sinai Hospital and Elmhurst Hospital Center.
When was this NPI record last updated?
The NPPES record for Bret Nelson was last updated on November 2, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Bret Nelson, MD · NPI 1255309407
Emergency Medicine physician in New York, New York. Individual provider, active in the CMS NPPES registry since March 14, 2006.
## Identity
- **NPI:** 1255309407 (Entity type: Individual)
- **Enumerated:** March 14, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 2320701 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 100TH ST. AND MADISON AVE, New York, NY 10029
- **Phone:** (212) 241-0101
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Fpa Hospital Based (NPI 1841531795, New York, NY); Icahn School Of Medicine At Mount Sinai (NPI 1346908662, New York, NY); Icahn School Of Medicine At Mount Sinai (NPI 1124392238, New York, NY); Icahn School Of Medicine At Mount Sinai (NPI 1679083984, New York, NY); Icahn School Of Medicine At Mount Sinai (NPI 1063766038, Elmhurst, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** State University Of New York At Stony Brook, School Of Medicine, class of 2000
## Record status
- **NPPES last updated:** November 2, 2007
- **Other identifiers:** Medicare UPIN I20530; Other P00169224 (NY); Medicaid 02611190 (NY); and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1255309407) · Data from the CMS NPPES public registry.