ILENE FENNOY MD
NPI 1770575862
Pediatrics - Pediatric Endocrinology in New York, NY
About Ilene Fennoy Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ILENE FENNOY MD (NPI 1770575862) is an individual pediatric endocrinology provider in New York, New York, licensed in New York (122361) and active in the NPI registry since August 2005. She is enrolled in Medicare PECOS and maintains a secondary practice location in Hawthorne.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Ilene Fennoy Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
5Medicare enrollment records show Ilene Fennoy 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 10032
- Reassigned Medicare billing, New York enrollment
- 612 clinicians in this Medicare group
New York, NY 10032
- Reassigned Medicare billing, New York enrollment
- 3,922 clinicians in this Medicare group
New York, NY 10037
- Reassigned Medicare billing, New York enrollment
- 2,094 clinicians in this Medicare group
New York, NY 10037
- Reassigned Medicare billing, New York enrollment
- 676 clinicians in this Medicare group
Hawthorne, NY 10532
- Reassigned Medicare billing, New York enrollment
- 511 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 10032 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.
NEW YORK, NY 10032
NEW YORK, NY 10032
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 Ilene Fennoy's NPI number?
The NPI number for Ilene Fennoy is 1770575862. It was assigned to this individual provider in the NPPES registry on August 16, 2005.
Where is Ilene Fennoy located?
Ilene Fennoy practices at 3959 Broadway Chn 106, New York, NY 10032. The listed phone number is (212) 305-6559.
What is Ilene Fennoy's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Endocrinology, with taxonomy code 2080P0205X.
Is Ilene Fennoy enrolled in Medicare?
Yes. Ilene Fennoy is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Ilene Fennoy's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ilene Fennoy reassigns Medicare benefits to 5 organizations: Trustees Of Columbia University In The City Of New York (New York, NY), Trustees Of Columbia University In The City Of New York (New York, NY), Physician Affiliate Group Of New York PC (New York, NY), Harlem Medical Associates PC (New York, NY) and Boston Children's Health Physicians, LLP (Hawthorne, 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 Ilene Fennoy'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 Ilene Fennoy was last updated on September 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 41 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.
# Ilene Fennoy, MD · NPI 1770575862
Pediatric Endocrinology physician in New York, New York. Individual provider, active in the CMS NPPES registry since August 16, 2005.
## Identity
- **NPI:** 1770575862 (Entity type: Individual)
- **Enumerated:** August 16, 2005
- **Primary specialty:** Pediatrics - Pediatric Endocrinology · taxonomy 2080P0205X
- **State license:** 122361 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 3959 BROADWAY, CHN 106, New York, NY 10032
- **Phone:** (212) 305-6559 · **Fax:** (212) 305-4778
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Trustees Of Columbia University In The City Of New York (NPI 1437176047, New York, NY); Trustees Of Columbia University In The City Of New York (NPI 1477068971, New York, NY); Physician Affiliate Group Of New York PC (NPI 1013375526, New York, NY); Harlem Medical Associates PC (NPI 1487957692, New York, NY); Boston Children's Health Physicians, LLP (NPI 1467454967, Hawthorne, NY) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 22, 2026
- **Other identifiers:** Medicaid 01126769 (NY)
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Source: [NPI Profile](https://npiprofile.com/npi/1770575862) · Data from the CMS NPPES public registry.