MARGAUX RIOUX FNP
NPI 1437964947
Nurse Practitioner - Family in South Portland, ME
About Margaux Rioux Fnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARGAUX RIOUX FNP (NPI 1437964947) is an individual family provider in South Portland, Maine, licensed in Maine (CNP251052) and active in the NPI registry since February 2025. She is enrolled in Medicare PECOS, is affiliated with Maine Medical Center, and is a graduate of Other (2024).
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
Margaux Rioux Fnp 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 Reassignment
Medicare enrollment records show Margaux Rioux reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
South Portland, ME 04106
- Reassigned Medicare billing, Maine enrollment
- 200 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Maine Medical Center
Acute Care Hospitals · Portland, MEPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 04106 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 9
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SOUTH PORTLAND, ME 04106
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 Margaux Rioux's NPI number?
The NPI number for Margaux Rioux is 1437964947. It was assigned to this individual provider in the NPPES registry on February 11, 2025.
Where is Margaux Rioux located?
Margaux Rioux practices at 100 Foden Rd Ste 203, South Portland, ME 04106. The listed phone number is (207) 874-1489.
What is Margaux Rioux's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Margaux Rioux enrolled in Medicare?
Yes. Margaux Rioux 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 organization bills Medicare for Margaux Rioux's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaux Rioux reassigns Medicare benefits to Intermed, PA (South Portland, ME). 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 Margaux Rioux's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Margaux Rioux affiliated with any hospitals?
According to CMS data, Margaux Rioux is affiliated with Maine Medical Center.
When was this NPI record last updated?
The NPPES record for Margaux Rioux was last updated on February 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.
# Margaux Rioux, FNP · NPI 1437964947
Family physician in South Portland, Maine. Individual provider, active in the CMS NPPES registry since February 11, 2025.
## Identity
- **NPI:** 1437964947 (Entity type: Individual)
- **Enumerated:** February 11, 2025
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** CNP251052 (Maine)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 FODEN RD STE 203, South Portland, ME 04106-2327
- **Phone:** (207) 874-1489
## 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:** Intermed, PA (NPI 1467422733, South Portland, ME), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2024
## Record status
- **NPPES last updated:** February 11, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1437964947) · Data from the CMS NPPES public registry.