SARAH O'LEARY DNP
NPI 1871086900
Nurse Anesthetist, Certified Registered in Chesterfield, MO
About Sarah O'leary Dnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SARAH O'LEARY DNP (NPI 1871086900) is an individual nurse anesthetist, certified registered in Chesterfield, Missouri, licensed in Missouri (2018018636) and active in the NPI registry since June 2018. She is affiliated with Mercy Hospital St Louis and is a graduate of Other (2018).
NPPES Registry Identity
Specialties & Licenses
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
Sarah O'leary Dnp 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
2Medicare enrollment records show Sarah O'leary reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chesterfield, MO 63017
- Reassigned Medicare billing, Missouri enrollment
- 60 clinicians in this Medicare group
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 6
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, MOSt Lukes Hospital
Acute Care Hospitals · Chesterfield, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63017 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.
CHESTERFIELD, MO 63017
CHESTERFIELD, MO 63017
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 Sarah O'leary's NPI number?
The NPI number for Sarah O'leary is 1871086900. It was assigned to this individual provider in the NPPES registry on June 13, 2018.
Where is Sarah O'leary located?
Sarah O'leary practices at 232 S Woods Mill Rd, Chesterfield, MO 63017. The listed phone number is (314) 434-1500.
What is Sarah O'leary's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Sarah O'leary enrolled in Medicare?
Yes. Sarah O'leary 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 Sarah O'leary's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sarah O'leary reassigns Medicare benefits to 2 organizations: Comprehensive Anesthesia Care PC (Chesterfield, MO) and Western Anesthesiology Associates, Inc. (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 Sarah O'leary's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Sarah O'leary accept?
Health plans from Anthem Blue Cross and Blue Shield list Sarah O'leary 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 Sarah O'leary affiliated with any hospitals?
According to CMS data, Sarah O'leary is affiliated with Mercy Hospital St Louis and St Lukes Hospital.
When was this NPI record last updated?
The NPPES record for Sarah O'leary was last updated on June 17, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Sarah O'leary, DNP · NPI 1871086900
Nurse Anesthetist, Certified Registered physician in Chesterfield, Missouri. Individual provider, active in the CMS NPPES registry since June 13, 2018.
## Identity
- **NPI:** 1871086900 (Entity type: Individual)
- **Enumerated:** June 13, 2018
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** 2018018636 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 232 S WOODS MILL RD, Chesterfield, MO 63017
- **Phone:** (314) 434-1500
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Comprehensive Anesthesia Care PC (NPI 1215975156, Chesterfield, MO); Western Anesthesiology Associates, Inc. (NPI 1275646754, Saint Louis, MO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2018
## Record status
- **NPPES last updated:** June 17, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1871086900) · Data from the CMS NPPES public registry.