MS. LORETTE OSUN CRNA
NPI 1164028171
Nurse Anesthetist, Certified Registered in Saint Louis, MO
About Ms. Lorette Osun Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. LORETTE OSUN CRNA (NPI 1164028171) is an individual nurse anesthetist, certified registered in Saint Louis, Missouri, licensed in Missouri (2023040165) and active in the NPI registry since December 2020. She is affiliated with Mercy Hospital St Louis, maintains a secondary practice location in Saint Louis, and is a graduate of Other (2023).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
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. Lorette Osun Crna 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 Lorette Osun reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 309 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 2
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
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, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63141 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 63141
SAINT LOUIS, MO 63141
SAINT LOUIS, MO 63141
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 Lorette Osun's NPI number?
The NPI number for Lorette Osun is 1164028171. It was assigned to this individual provider in the NPPES registry on December 7, 2020.
Where is Lorette Osun located?
Lorette Osun practices at 615 S New Ballas Rd Dept Of, Saint Louis, MO 63141. The listed phone number is (636) 386-9224.
What is Lorette Osun's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Lorette Osun enrolled in Medicare?
Yes. Lorette Osun 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 Lorette Osun's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lorette Osun reassigns Medicare benefits to Western Anesthesiology Associates, Inc. (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 Lorette Osun's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Lorette Osun affiliated with any hospitals?
According to CMS data, Lorette Osun is affiliated with Mercy Hospital St Louis.
When was this NPI record last updated?
The NPPES record for Lorette Osun was last updated on November 3, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Ms. Lorette Osun, CRNA · NPI 1164028171
Nurse Anesthetist, Certified Registered physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since December 7, 2020.
## Identity
- **NPI:** 1164028171 (Entity type: Individual)
- **Enumerated:** December 7, 2020
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** 2023040165 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 615 S NEW BALLAS RD DEPT OF, Saint Louis, MO 63141-8221
- **Phone:** (636) 386-9224 · **Fax:** (636) 386-7679
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** Western Anesthesiology Associates, Inc. (NPI 1275646754, Saint Louis, MO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2023
## Record status
- **NPPES last updated:** November 3, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1164028171) · Data from the CMS NPPES public registry.