JILLIAN ASHLEY LEIBOWITZ DO
NPI 1225787476
Emergency Medicine in Stony Brook, NY
About Jillian Ashley Leibowitz Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JILLIAN ASHLEY LEIBOWITZ DO (NPI 1225787476) is an individual emergency medicine provider in Stony Brook, New York, licensed in New York (335124) and active in the NPI registry since March 2022. She is enrolled in Medicare PECOS, is affiliated with Hca Florida Aventura Hospital, and is a graduate of Other (2022).
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 and accepts Medicare assignment
Jillian Ashley Leibowitz Do 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 Jillian Leibowitz reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Stony Brook, NY 11794
- Reassigned Medicare billing, New York enrollment
- 77 clinicians in this Medicare group
Aventura, FL 33180
- Reassigned Medicare billing, Florida enrollment
- 1,912 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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Hca Florida Aventura Hospital
Acute Care Hospitals · Aventura, FLSuny/Stony Brook University Hospital
Acute Care Hospitals · Stony Brook, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11794 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 8
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
STONY BROOK, NY 11794
STONY BROOK, NY 11794
STONY BROOK, NY 11794
STONY BROOK, NY 11794
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 Jillian Leibowitz's NPI number?
The NPI number for Jillian Leibowitz is 1225787476. It was assigned to this individual provider in the NPPES registry on March 23, 2022.
Where is Jillian Leibowitz located?
Jillian Leibowitz practices at 101 Nicolls Rd Rm 50, Stony Brook, NY 11794. The listed phone number is (631) 444-3880.
What is Jillian Leibowitz's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Jillian Leibowitz enrolled in Medicare?
Yes. Jillian Leibowitz 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 Jillian Leibowitz's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jillian Leibowitz reassigns Medicare benefits to 2 organizations: Stony Brook Emergency Physicians, University Faculty Practice Corporat (Stony Brook, NY) and Emergency Medicine Services Of Fl, LLC (Aventura, FL). 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 Jillian Leibowitz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Jillian Leibowitz accept?
Health plans from Oscar Health Maintenance Organization of Florida list Jillian Leibowitz 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.
Is Jillian Leibowitz affiliated with any hospitals?
According to CMS data, Jillian Leibowitz is affiliated with Hca Florida Aventura Hospital and Suny/Stony Brook University Hospital.
When was this NPI record last updated?
The NPPES record for Jillian Leibowitz was last updated on June 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.
# Jillian Ashley Leibowitz, DO · NPI 1225787476
Emergency Medicine physician in Stony Brook, New York. Individual provider, active in the CMS NPPES registry since March 23, 2022.
## Identity
- **NPI:** 1225787476 (Entity type: Individual)
- **Enumerated:** March 23, 2022
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 335124 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 101 NICOLLS RD RM 50, Stony Brook, NY 11794-0001
- **Phone:** (631) 444-3880
## 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): Stony Brook Emergency Physicians, University Faculty Practice Corporat (NPI 1265487672, Stony Brook, NY); Emergency Medicine Services Of Fl, LLC (NPI 1043917180, Aventura, FL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2022
## Record status
- **NPPES last updated:** June 24, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1225787476) · Data from the CMS NPPES public registry.