LEONARD H WEXLER MD
NPI 1831161181
Pediatrics - Pediatric Hematology-Oncology in New York, NY
About Leonard H Wexler Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LEONARD H WEXLER MD (NPI 1831161181) is an individual pediatric hematology-oncology provider in New York, New York, licensed in New York (168581) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS and is a graduate of Boston University School Of Medicine (1985).
NPPES Registry Identity
Specialties & Licenses
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
Leonard H Wexler 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
2Medicare enrollment records show Leonard Wexler reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
New York, NY 10021
- Reassigned Medicare billing, New York enrollment
- 220 clinicians in this Medicare group
Middletown, NJ 07748
- Reassigned Medicare billing, New Jersey enrollment
- 464 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.
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 10021
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 Leonard Wexler's NPI number?
The NPI number for Leonard Wexler is 1831161181. It was assigned to this individual provider in the NPPES registry on February 2, 2006.
Where is Leonard Wexler located?
Leonard Wexler practices at 1275 York Ave, New York, NY 10021. The listed phone number is (212) 639-7990.
What is Leonard Wexler's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Hematology-Oncology, with taxonomy code 2080P0207X.
Is Leonard Wexler enrolled in Medicare?
Yes. Leonard Wexler 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 Leonard Wexler's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Leonard Wexler reassigns Medicare benefits to 2 organizations: Memorial Pediatric Group (New York, NY) and Msk Monmouth (Middletown, NJ). 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 Leonard Wexler'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 Leonard Wexler was last updated on August 11, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Leonard H Wexler, MD · NPI 1831161181
Pediatric Hematology-Oncology physician in New York, New York. Individual provider, active in the CMS NPPES registry since February 2, 2006.
## Identity
- **NPI:** 1831161181 (Entity type: Individual)
- **Enumerated:** February 2, 2006
- **Primary specialty:** Pediatrics - Pediatric Hematology-Oncology · taxonomy 2080P0207X
- **State license:** 168581 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 1275 YORK AVE, New York, NY 10021-6007
- **Phone:** (212) 639-7990
## 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): Memorial Pediatric Group (NPI 1750352381, New York, NY); Msk Monmouth (NPI 1922459163, Middletown, NJ) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Boston University School Of Medicine, class of 1985
## Record status
- **NPPES last updated:** August 11, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1831161181) · Data from the CMS NPPES public registry.