ELLEN BIRENBAUM MD
NPI 1447220736
Internal Medicine in New York, NY
About Ellen Birenbaum Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ELLEN BIRENBAUM MD (NPI 1447220736) is an individual internal medicine provider in New York, New York, licensed in New York (150923) and active in the NPI registry since January 2006. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Ellen Birenbaum Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Ellen Birenbaum reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
New York, NY 10036
- Reassigned Medicare billing, New York enrollment
- 48 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10003 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 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NEW YORK, NY 10003
NEW YORK, NY 10003
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 Ellen Birenbaum's NPI number?
The NPI number for Ellen Birenbaum is 1447220736. It was assigned to this individual provider in the NPPES registry on January 26, 2006.
Where is Ellen Birenbaum located?
Ellen Birenbaum practices at 10 Union Square E, New York, NY 10003. The listed phone number is (212) 420-3494.
What is Ellen Birenbaum's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Ellen Birenbaum enrolled in Medicare?
Yes. Ellen Birenbaum is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Ellen Birenbaum's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ellen Birenbaum reassigns Medicare benefits to Ryan-Chelsea Clinton Community Health Center (New York, NY). The 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 Ellen Birenbaum's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Ellen Birenbaum was last updated on August 17, 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.
# Ellen Birenbaum, MD · NPI 1447220736
Internal Medicine physician in New York, New York. Individual provider, active in the CMS NPPES registry since January 26, 2006.
## Identity
- **NPI:** 1447220736 (Entity type: Individual)
- **Enumerated:** January 26, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 150923 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 10 UNION SQUARE E, New York, NY 10003
- **Phone:** (212) 420-3494
## 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:** Ryan-Chelsea Clinton Community Health Center (NPI 1215978960, New York, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** August 17, 2012
- **Other identifiers:** Medicare ID-Type Unspecified 94A231 (NY); Medicare UPIN B20251; Medicaid 00806551 (NY)
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Source: [NPI Profile](https://npiprofile.com/npi/1447220736) · Data from the CMS NPPES public registry.