DR. MARY AGNES NEWELL D.O.
NPI 1174882757
Emergency Medicine in Sleepy Hollow, NY
About Dr. Mary Agnes Newell D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARY AGNES NEWELL D.O. (NPI 1174882757) is an individual emergency medicine provider in Sleepy Hollow, New York, licensed in New York (268239-1) and active in the NPI registry since May 2012. She is enrolled in Medicare PECOS, is affiliated with Montefiore Medical Center, and is a graduate of New York College Of Osteo Medicine Of New York Institute Of Technology (2009).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Mary Agnes Newell D.o. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Mary Newell reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Bronx, NY 10467
- Reassigned Medicare billing, New York enrollment
- 5,251 clinicians in this Medicare group
Great Neck, NY 11021
- Reassigned Medicare billing, New York enrollment
- 9,353 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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Montefiore Medical Center
Acute Care Hospitals · Bronx, NYPhelps Hospital
Acute Care Hospitals · Sleepy Hollow, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10457 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.
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 Mary Newell's NPI number?
The NPI number for Mary Newell is 1174882757. It was assigned to this individual provider in the NPPES registry on May 16, 2012. The provider is also known as Dr. Maggie Garvey Newell D.O..
Where is Mary Newell located?
Mary Newell practices at 701 North Broadway Northwell Phelps Hospital Emergency Medicine Dept., Sleepy Hollow, NY 10457. The listed phone number is (914) 366-3591.
What is Mary Newell's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Mary Newell enrolled in Medicare?
Yes. Mary Newell is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Mary Newell's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Newell reassigns Medicare benefits to 2 organizations: Montefiore Medical Center (Bronx, NY) and North Shore-Lij Medical PC (Great Neck, NY). 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 Mary Newell's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Mary Newell affiliated with any hospitals?
According to CMS data, Mary Newell is affiliated with Montefiore Medical Center and Phelps Hospital.
When was this NPI record last updated?
The NPPES record for Mary Newell was last updated on August 13, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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. Mary Agnes Newell, D.O. · NPI 1174882757
Emergency Medicine physician in Sleepy Hollow, New York. Individual provider, active in the CMS NPPES registry since May 16, 2012.
## Identity
- **NPI:** 1174882757 (Entity type: Individual)
- **Enumerated:** May 16, 2012
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 268239-1 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 701 NORTH BROADWAY, NORTHWELL PHELPS HOSPITAL EMERGENCY MEDICINE DEPT., Sleepy Hollow, NY 10457-1059
- **Phone:** (914) 366-3591
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Montefiore Medical Center (NPI 1063525152, Bronx, NY); North Shore-Lij Medical PC (NPI 1053688572, Great Neck, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New York College Of Osteo Medicine Of New York Institute Of Technology, class of 2009
## Record status
- **NPPES last updated:** August 13, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1174882757) · Data from the CMS NPPES public registry.