ARIELLE ORNSTEIN
NPI 1811214026
Pediatrics in Rye Brook, NY
About Arielle Ornstein NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ARIELLE ORNSTEIN (NPI 1811214026) is an individual pediatrics provider in Rye Brook, New York, licensed in New York (270116) and active in the NPI registry since April 2010. She is enrolled in Medicare PECOS and maintains a secondary practice location in New York.
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)
Arielle Ornstein is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Arielle Ornstein reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Greenwich, CT 06830
- Reassigned Medicare billing, Connecticut enrollment
- Medicare enrollment name: Northeast Medical Group Inc
- 1,824 clinicians in this Medicare group
Greenwich, CT 06830
- Reassigned Medicare billing, New York enrollment
- 47 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10573 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 14
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
RYE BROOK, NY 10573
RYE BROOK, NY 10573
RYE BROOK, NY 10573
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 Arielle Ornstein's NPI number?
The NPI number for Arielle Ornstein is 1811214026. It was assigned to this individual provider in the NPPES registry on April 27, 2010.
Where is Arielle Ornstein located?
Arielle Ornstein practices at 90 S Ridge St, Rye Brook, NY 10573. The listed phone number is (914) 251-1100.
What is Arielle Ornstein's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Arielle Ornstein enrolled in Medicare?
Yes. Arielle Ornstein is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Arielle Ornstein's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Arielle Ornstein reassigns Medicare benefits to 2 organizations: Mill Hill Medical Consultants Inc (Greenwich, CT) and Northeast Medical Group, PLLC (Greenwich, CT). 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 Arielle Ornstein's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Arielle Ornstein accept?
Health plans from Anthem Blue Cross and Blue Shield list Arielle Ornstein 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 Arielle Ornstein was last updated on December 6, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Arielle Ornstein · NPI 1811214026
Pediatrics physician in Rye Brook, New York. Individual provider, active in the CMS NPPES registry since April 27, 2010.
## Identity
- **NPI:** 1811214026 (Entity type: Individual)
- **Enumerated:** April 27, 2010
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** 270116 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 90 S RIDGE ST, Rye Brook, NY 10573
- **Phone:** (914) 251-1100
## 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): Mill Hill Medical Consultants Inc (NPI 1396755245, Greenwich, CT); Northeast Medical Group, PLLC (NPI 1942526207, Greenwich, CT) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** December 6, 2019
---
Source: [NPI Profile](https://npiprofile.com/npi/1811214026) · Data from the CMS NPPES public registry.