DR. MARY ELIZABETH FOURNIER MD
NPI 1841251303
Pediatrics - Adolescent Medicine in Saint Louis, MO
About Dr. Mary Elizabeth Fournier Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARY ELIZABETH FOURNIER MD (NPI 1841251303) is an individual adolescent medicine provider in Saint Louis, Missouri, licensed in Missouri (2018013808) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS and is a graduate of Saint Louis University School Of Medicine (2002).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 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 and accepts Medicare assignment
Dr. Mary Elizabeth Fournier Md 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 Reassignments
3Medicare enrollment records show Mary Fournier reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Louis, MO 63110
- Reassigned Medicare billing, Missouri enrollment
- 628 clinicians in this Medicare group
Saint Louis, MO 63108
- Reassigned Medicare billing, Illinois enrollment
- 530 clinicians in this Medicare group
Chicago, IL 60611
- Reassigned Medicare billing, Illinois enrollment
- 826 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.
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
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 Fournier's NPI number?
The NPI number for Mary Fournier is 1841251303. It was assigned to this individual provider in the NPPES registry on March 31, 2006.
Where is Mary Fournier located?
Mary Fournier practices at 1 Childrens Pl Div Ped, Adolescent Medicine, Saint Louis, MO 63110. The listed phone number is (314) 454-2468.
What is Mary Fournier's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Adolescent Medicine, with taxonomy code 2080A0000X.
Is Mary Fournier enrolled in Medicare?
Yes. Mary Fournier 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 organizations bill Medicare for Mary Fournier's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Fournier reassigns Medicare benefits to 3 organizations: Washington University (Saint Louis, MO), Washington University Physicians In Illinois, Inc (Saint Louis, MO) and Lurie Children's Medical Group Inc (Chicago, IL). 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 Fournier's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Fournier accept?
Health plans from UnitedHealthcare list Mary Fournier 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 Mary Fournier was last updated on April 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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 Elizabeth Fournier, MD · NPI 1841251303
Adolescent Medicine physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since March 31, 2006.
## Identity
- **NPI:** 1841251303 (Entity type: Individual)
- **Enumerated:** March 31, 2006
- **Primary specialty:** Pediatrics - Adolescent Medicine · taxonomy 2080A0000X
- **State license:** 2018013808 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 CHILDRENS PL, DIV PED, ADOLESCENT MEDICINE, Saint Louis, MO 63110-1002
- **Phone:** (314) 454-2468 · **Fax:** (314) 454-2524
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Washington University (NPI 1194765685, Saint Louis, MO); Washington University Physicians In Illinois, Inc (NPI 1457203135, Saint Louis, MO); Lurie Children's Medical Group Inc (NPI 1518064716, Chicago, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Saint Louis University School Of Medicine, class of 2002
## Record status
- **NPPES last updated:** April 17, 2025
- **Other identifiers:** Medicaid 200055298 (MO)
---
Source: [NPI Profile](https://npiprofile.com/npi/1841251303) · Data from the CMS NPPES public registry.