SEAN O'NEILL CRNA
NPI 1043703663
Nurse Anesthetist, Certified Registered in Southfield, MI
About Sean O'neill Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SEAN O'NEILL CRNA (NPI 1043703663) is an individual nurse anesthetist, certified registered in Southfield, Michigan, licensed in Michigan (4704297556) and active in the NPI registry since June 2018. He is affiliated with Trinity Health Ann Arbor Hospital and is a graduate of Other (2018).
NPPES Registry Identity
Specialties & Licenses
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
Sean O'neill 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 Reassignments
2Medicare enrollment records show Sean O'neill reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Ypsilanti, MI 48197
- Reassigned Medicare billing, Michigan enrollment
- 151 clinicians in this Medicare group
Southfield, MI 48075
- Reassigned Medicare billing, Michigan enrollment
- 209 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.
Trinity Health Ann Arbor Hospital
Acute Care Hospitals · Ann Arbor, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48075 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.
SOUTHFIELD, MI 48075
SOUTHFIELD, MI 48075
SOUTHFIELD, MI 48075
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 Sean O'neill's NPI number?
The NPI number for Sean O'neill is 1043703663. It was assigned to this individual provider in the NPPES registry on June 8, 2018.
Where is Sean O'neill located?
Sean O'neill practices at 16001 W 9 Mile Rd, Southfield, MI 48075. The listed phone number is (248) 849-3000.
What is Sean O'neill's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Sean O'neill enrolled in Medicare?
Yes. Sean O'neill 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 Sean O'neill's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sean O'neill reassigns Medicare benefits to 2 organizations: Sjmhs Anesthesia Services (Ypsilanti, MI) and Psj Anesthesia PC (Southfield, MI). 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 Sean O'neill's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Sean O'neill affiliated with any hospitals?
According to CMS data, Sean O'neill is affiliated with Trinity Health Ann Arbor Hospital.
When was this NPI record last updated?
The NPPES record for Sean O'neill was last updated on June 8, 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.
# Sean O'neill, CRNA · NPI 1043703663
Nurse Anesthetist, Certified Registered physician in Southfield, Michigan. Individual provider, active in the CMS NPPES registry since June 8, 2018.
## Identity
- **NPI:** 1043703663 (Entity type: Individual)
- **Enumerated:** June 8, 2018
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** 4704297556 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 16001 W 9 MILE RD, Southfield, MI 48075-4818
- **Phone:** (248) 849-3000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Sjmhs Anesthesia Services (NPI 1184069874, Ypsilanti, MI); Psj Anesthesia PC (NPI 1275905796, Southfield, MI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2018
## Record status
- **NPPES last updated:** June 8, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1043703663) · Data from the CMS NPPES public registry.