MARGARET H WILL CRNA
NPI 1861220717
Nurse Anesthetist, Certified Registered in Chesterfield, MO
About Margaret H Will Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARGARET H WILL CRNA (NPI 1861220717) is an individual nurse anesthetist, certified registered in Chesterfield, Missouri, licensed in Missouri (2024028951) and active in the NPI registry since July 2024. She is affiliated with Ssm Health St Mary's Hospital - St Louis and is a graduate of Other (2024).
NPPES Registry Identity
Specialties & Licenses
Other Names 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
Margaret H Will 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 Margaret Will reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Chesterfield, MO 63017
- Reassigned Medicare billing, Missouri enrollment
- 221 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Ssm Health St Mary's Hospital - St Louis
Acute Care Hospitals · Richmond Heights, 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
CHESTERFIELD, MO 63017
CHESTERFIELD, MO 63017
CHESTERFIELD, MO 63017
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 Margaret Will's NPI number?
The NPI number for Margaret Will is 1861220717. It was assigned to this individual provider in the NPPES registry on July 23, 2024. The provider is also known as Margaret H Hall.
Where is Margaret Will located?
Margaret Will practices at 400 S Woods Mill Rd Ste 140, Chesterfield, MO 63017. The listed phone number is (314) 485-1101.
What is Margaret Will's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Margaret Will enrolled in Medicare?
Yes. Margaret Will 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 Margaret Will's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Will reassigns Medicare benefits to Metro-West Anesthesia Group Inc (Chesterfield, 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 Margaret Will's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Margaret Will affiliated with any hospitals?
According to CMS data, Margaret Will is affiliated with Ssm Health St Mary's Hospital - St Louis.
When was this NPI record last updated?
The NPPES record for Margaret Will was last updated on July 23, 2024. 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.
# Margaret H Will, CRNA · NPI 1861220717
Nurse Anesthetist, Certified Registered physician in Chesterfield, Missouri. Individual provider, active in the CMS NPPES registry since July 23, 2024.
## Identity
- **NPI:** 1861220717 (Entity type: Individual)
- **Enumerated:** July 23, 2024
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** 2024028951 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 400 S WOODS MILL RD STE 140, Chesterfield, MO 63017-3427
- **Phone:** (314) 485-1101
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** Metro-West Anesthesia Group Inc (NPI 1245427335, Chesterfield, MO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2024
## Record status
- **NPPES last updated:** July 23, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1861220717) · Data from the CMS NPPES public registry.