KELCY OESTERREICH NP
NPI 1417504267
Nurse Practitioner - Family in Fenton, MO
About Kelcy Oesterreich Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KELCY OESTERREICH NP (NPI 1417504267) is an individual family provider in Fenton, Missouri, licensed in Missouri (2019035094) and active in the NPI registry since August 2019. She is enrolled in Medicare PECOS, is affiliated with Mercy Hospital St Louis, and maintains a secondary practice location in Mexico.
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 and accepts Medicare assignment
Kelcy Oesterreich Np 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 Kelcy Oesterreich reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Saint Louis, MO 63128
- 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.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Hospital St Louis
Acute Care Hospitals · Saint Louis, MOMercy Hospital South
Acute Care Hospitals · Saint Louis, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63026 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 12
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FENTON, MO 63026
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 Kelcy Oesterreich's NPI number?
The NPI number for Kelcy Oesterreich is 1417504267. It was assigned to this individual provider in the NPPES registry on August 26, 2019.
Where is Kelcy Oesterreich located?
Kelcy Oesterreich practices at 1345 Smizer Mill Rd Ste 1100, Fenton, MO 63026. The listed phone number is (636) 496-5023.
What is Kelcy Oesterreich's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Kelcy Oesterreich enrolled in Medicare?
Yes. Kelcy Oesterreich 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 Kelcy Oesterreich's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kelcy Oesterreich reassigns Medicare benefits to Mercy Clinic East Communities (Saint Louis, MO). 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 Kelcy Oesterreich's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Kelcy Oesterreich accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 3 other insurers list Kelcy Oesterreich 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.
Is Kelcy Oesterreich affiliated with any hospitals?
According to CMS data, Kelcy Oesterreich is affiliated with Mercy Hospital St Louis and Mercy Hospital South.
When was this NPI record last updated?
The NPPES record for Kelcy Oesterreich was last updated on December 6, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Kelcy Oesterreich, NP · NPI 1417504267
Family physician in Fenton, Missouri. Individual provider, active in the CMS NPPES registry since August 26, 2019.
## Identity
- **NPI:** 1417504267 (Entity type: Individual)
- **Enumerated:** August 26, 2019
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 2019035094 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 1345 SMIZER MILL RD STE 1100, Fenton, MO 63026-7305
- **Phone:** (636) 496-5023
## 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:** Mercy Clinic East Communities (NPI 1720635329, Saint Louis, MO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Missouri, Kansas City, School Of Medicine, class of 2019
## Record status
- **NPPES last updated:** December 6, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1417504267) · Data from the CMS NPPES public registry.