ALIZA LEAH LEISER MD
NPI 1588789796
Obstetrics & Gynecology - Gynecologic Oncology in New York, NY
About Aliza Leah Leiser Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALIZA LEAH LEISER MD (NPI 1588789796) is an individual gynecologic oncology provider in New York, New York, licensed in New Jersey (25MA09493000) and active in the NPI registry since March 2007. She is enrolled in Medicare PECOS, is affiliated with Robert Wood Johnson University Hospital, and is a graduate of Albert Einstein College Of Medicine Of Yeshiva University (1998).
NPPES Registry Identity
Specialties & Licenses 2
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
Aliza Leah Leiser 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 Reassignment
Medicare enrollment records show Aliza Leiser reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Piscataway, NJ 08854
- Reassigned Medicare billing, New Jersey enrollment
- 641 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 3
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Robert Wood Johnson University Hospital
Acute Care Hospitals · New Brunswick, NJPhysician 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.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
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.
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 Aliza Leiser's NPI number?
The NPI number for Aliza Leiser is 1588789796. It was assigned to this individual provider in the NPPES registry on March 20, 2007.
Where is Aliza Leiser located?
Aliza Leiser practices at 10 Union Sq E, New York, NY 10003. The listed phone number is (212) 844-5729.
What is Aliza Leiser's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Gynecologic Oncology, with taxonomy code 207VX0201X.
Is Aliza Leiser enrolled in Medicare?
Yes. Aliza Leiser 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 organization bills Medicare for Aliza Leiser's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Aliza Leiser reassigns Medicare benefits to Rutgers Health-Rwj Scleroderma Program (Piscataway, NJ). 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 Aliza Leiser's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Aliza Leiser accept?
Health plans from Oscar Health list Aliza Leiser 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 Aliza Leiser affiliated with any hospitals?
According to CMS data, Aliza Leiser is affiliated with Robert Wood Johnson University Hospital.
When was this NPI record last updated?
The NPPES record for Aliza Leiser was last updated on May 24, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Aliza Leah Leiser, MD · NPI 1588789796
Gynecologic Oncology physician in New York, New York. Individual provider, active in the CMS NPPES registry since March 20, 2007.
## Identity
- **NPI:** 1588789796 (Entity type: Individual)
- **Enumerated:** March 20, 2007
- **Primary specialty:** Obstetrics & Gynecology - Gynecologic Oncology · taxonomy 207VX0201X
- **State license:** 25MA09493000 (New Jersey)
- **Sole proprietor:** No
## Practice location
- **Address:** 10 UNION SQ E, New York, NY 10003-3314
- **Phone:** (212) 844-5729
## 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:** Rutgers Health-Rwj Scleroderma Program (NPI 1316222664, Piscataway, NJ), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Albert Einstein College Of Medicine Of Yeshiva University, class of 1998
## Record status
- **NPPES last updated:** May 24, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1588789796) · Data from the CMS NPPES public registry.