JOHN MASCARI MD
NPI 1154828507
Pediatrics - Neonatal-Perinatal Medicine in New York, NY
About John Mascari Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN MASCARI MD (NPI 1154828507) is an individual neonatal-perinatal medicine provider in New York, New York, licensed in New York (337258) and active in the NPI registry since April 2018. He is enrolled in Medicare PECOS and is a graduate of Geisel School Of Medicine At Dartmouth (2018).
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 (PECOS)
John Mascari Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show John Mascari reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
New York, NY 10021
- Reassigned Medicare billing, New York enrollment
- 980 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 10065
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 John Mascari's NPI number?
The NPI number for John Mascari is 1154828507. It was assigned to this individual provider in the NPPES registry on April 11, 2018.
Where is John Mascari located?
John Mascari practices at 1283 York Ave, New York, NY 10065. The listed phone number is (646) 697-6428.
What is John Mascari's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Neonatal-Perinatal Medicine, with taxonomy code 2080N0001X.
Is John Mascari enrolled in Medicare?
Yes. John Mascari is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for John Mascari's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Mascari reassigns Medicare benefits to Weill Medical College Of Cornell (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 John Mascari'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 John Mascari was last updated on March 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# John Mascari, MD · NPI 1154828507
Neonatal-Perinatal Medicine physician in New York, New York. Individual provider, active in the CMS NPPES registry since April 11, 2018.
## Identity
- **NPI:** 1154828507 (Entity type: Individual)
- **Enumerated:** April 11, 2018
- **Primary specialty:** Pediatrics - Neonatal-Perinatal Medicine · taxonomy 2080N0001X
- **State license:** 337258 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 1283 YORK AVE, New York, NY 10065
- **Phone:** (646) 697-6428
## 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:** Weill Medical College Of Cornell (NPI 1124170212, New York, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Geisel School Of Medicine At Dartmouth, class of 2018
## Record status
- **NPPES last updated:** March 2, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1154828507) · Data from the CMS NPPES public registry.