DR. NISREEN S MAARI MD
NPI 1427204429
Pediatrics - Neonatal-Perinatal Medicine in Newton, MA
About Dr. Nisreen S Maari Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. NISREEN S MAARI MD (NPI 1427204429) is an individual neonatal-perinatal medicine provider in Newton, Massachusetts, licensed in Massachusetts (256036) and active in the NPI registry since August 2008. She is enrolled in Medicare PECOS and maintains a secondary practice location in Brighton.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Nisreen S Maari Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
6Medicare enrollment records show Nisreen Maari reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Newton, MA 02462
- Reassigned Medicare billing, Massachusetts enrollment
- 992 clinicians in this Medicare group
Watertown, MA 02472
- Reassigned Medicare billing, Massachusetts enrollment
- 1,103 clinicians in this Medicare group
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 4,574 clinicians in this Medicare group
Boston, MA 02118
- Reassigned Medicare billing, Massachusetts enrollment
- 716 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 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.
NEWTON, MA 02462
NEWTON, MA 02462
NEWTON, MA 02462
NEWTON, MA 02462
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 Nisreen Maari's NPI number?
The NPI number for Nisreen Maari is 1427204429. It was assigned to this individual provider in the NPPES registry on August 11, 2008.
Where is Nisreen Maari located?
Nisreen Maari practices at 2014 Washington St, Newton, MA 02462. The listed phone number is (617) 512-4390.
What is Nisreen Maari's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Neonatal-Perinatal Medicine, with taxonomy code 2080N0001X.
Is Nisreen Maari enrolled in Medicare?
Yes. Nisreen Maari is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Nisreen Maari's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nisreen Maari reassigns Medicare benefits to 6 organizations: Mass General Brigham Medical Group Suburban Massachusetts Inc (Newton, MA), Steward Medical Group, Inc (Watertown, MA), Brigham & Womens Physicians Organization Inc (Boston, MA), Bmc Affiliated Physicians, Inc. (Boston, MA), The General Hospital Corporation (Boston, MA) and 1 more organization, listed in the Medicare section above. 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 Nisreen Maari's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Nisreen Maari accept?
Health plans from Taro Health and WellSense Health Plan list Nisreen Maari 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.
When was this NPI record last updated?
The NPPES record for Nisreen Maari was last updated on March 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Dr. Nisreen S Maari, MD · NPI 1427204429
Neonatal-Perinatal Medicine physician in Newton, Massachusetts. Individual provider, active in the CMS NPPES registry since August 11, 2008.
## Identity
- **NPI:** 1427204429 (Entity type: Individual)
- **Enumerated:** August 11, 2008
- **Primary specialty:** Pediatrics - Neonatal-Perinatal Medicine · taxonomy 2080N0001X
- **State license:** 256036 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 2014 WASHINGTON ST, Newton, MA 02462-1607
- **Phone:** (617) 512-4390
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): Mass General Brigham Medical Group Suburban Massachusetts Inc (NPI 1538191218, Newton, MA); Steward Medical Group, Inc (NPI 1629398219, Watertown, MA); Brigham & Womens Physicians Organization Inc (NPI 1033535497, Boston, MA); Bmc Affiliated Physicians, Inc. (NPI 1245320910, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** March 7, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1427204429) · Data from the CMS NPPES public registry.