MS. IRENE MARION RATHJEN PNP
NPI 1447629464
Nurse Practitioner - Pediatrics in Saint Louis, MO
About Ms. Irene Marion Rathjen Pnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. IRENE MARION RATHJEN PNP (NPI 1447629464) is an individual pediatrics provider in Saint Louis, Missouri, licensed in Missouri (2015016091) and active in the NPI registry since September 2015. She is enrolled in Medicare PECOS and is a graduate of Other (2014).
NPPES Registry Identity
Specialties & Licenses
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
Ms. Irene Marion Rathjen Pnp 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 Irene Rathjen 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 63110
- Reassigned Medicare billing, Missouri enrollment
- 95 clinicians in this Medicare group
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 744 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 63110 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 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 Irene Rathjen's NPI number?
The NPI number for Irene Rathjen is 1447629464. It was assigned to this individual provider in the NPPES registry on September 21, 2015.
Where is Irene Rathjen located?
Irene Rathjen practices at 1 Childrens Pl Div Ped Genetics And Genomic Med, Saint Louis, MO 63110. The listed phone number is (314) 454-6093.
What is Irene Rathjen's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Pediatrics, with taxonomy code 363LP0200X.
Is Irene Rathjen enrolled in Medicare?
Yes. Irene Rathjen 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 Irene Rathjen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Irene Rathjen reassigns Medicare benefits to 3 organizations: Washington University (Saint Louis, MO), Shriners Hospitals For Children (Saint Louis, MO) and Mercy Clinic East Communities (Saint Louis, MO). 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 Irene Rathjen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Irene Rathjen accept?
Health plans from UnitedHealthcare list Irene Rathjen 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 Irene Rathjen 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.
# Ms. Irene Marion Rathjen, PNP · NPI 1447629464
Pediatrics physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since September 21, 2015.
## Identity
- **NPI:** 1447629464 (Entity type: Individual)
- **Enumerated:** September 21, 2015
- **Primary specialty:** Nurse Practitioner - Pediatrics · taxonomy 363LP0200X
- **State license:** 2015016091 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 CHILDRENS PL, DIV PED GENETICS AND GENOMIC MED, Saint Louis, MO 63110-1002
- **Phone:** (314) 454-6093 · **Fax:** (844) 965-9624
## 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); Shriners Hospitals For Children (NPI 1275970295, Saint Louis, MO); Mercy Clinic East Communities (NPI 1851335228, Saint Louis, MO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2014
## Record status
- **NPPES last updated:** April 17, 2025
- **Other identifiers:** Medicaid 420033957 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1447629464) · Data from the CMS NPPES public registry.