DR. MARY L SEYMOUR MD
NPI 1548201742
Pediatrics - Pediatric Emergency Medicine in Mandeville, LA
About Dr. Mary L Seymour Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARY L SEYMOUR MD (NPI 1548201742) is an individual pediatric emergency medicine provider in Mandeville, Louisiana, licensed in Louisiana (MD.017619) and active in the NPI registry since June 2006. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 4
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 L Seymour Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Mary Seymour reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Mandeville, LA 70448
- Reassigned Medicare billing, Louisiana enrollment
- 4,559 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.
MANDEVILLE, LA 70448
MANDEVILLE, LA 70448
MANDEVILLE, LA 70448
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 Seymour's NPI number?
The NPI number for Mary Seymour is 1548201742. It was assigned to this individual provider in the NPPES registry on June 9, 2006.
Where is Mary Seymour located?
Mary Seymour practices at 2810 E Causeway Approach, Mandeville, LA 70448. The listed phone number is (985) 875-2340.
What is Mary Seymour's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Emergency Medicine, with taxonomy code 2080P0204X.
Is Mary Seymour enrolled in Medicare?
Yes. Mary Seymour is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Mary Seymour's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Seymour reassigns Medicare benefits to Ochsner Clinic LLC (Mandeville, LA). 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 Mary Seymour's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Mary Seymour was last updated on December 17, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Dr. Mary L Seymour, MD · NPI 1548201742
Pediatric Emergency Medicine physician in Mandeville, Louisiana. Individual provider, active in the CMS NPPES registry since June 9, 2006.
## Identity
- **NPI:** 1548201742 (Entity type: Individual)
- **Enumerated:** June 9, 2006
- **Primary specialty:** Pediatrics - Pediatric Emergency Medicine · taxonomy 2080P0204X
- **State license:** MD.017619 (Louisiana)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 2810 E CAUSEWAY APPROACH, Mandeville, LA 70448-3502
- **Phone:** (985) 875-2340
## 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:** Ochsner Clinic LLC (NPI 1972736619, Mandeville, LA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** December 17, 2007
- **Other identifiers:** Medicaid 00119378 (MS); Medicare UPIN F91253; Medicare ID-Type Unspecified 52574 (LA); and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1548201742) · Data from the CMS NPPES public registry.