DELANEY CATHERINE O'BRIEN AA
NPI 1629716758
Anesthesiologist Assistant in Grand Rapids, MI
About Delaney Catherine O'brien Aa NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DELANEY CATHERINE O'BRIEN AA (NPI 1629716758) is an individual anesthesiologist assistant in Grand Rapids, Michigan, licensed in Michigan (32698139) and active in the NPI registry since May 2022. She is affiliated with University Of Toledo Medical Center, maintains 4 additional practice locations, and is a graduate of Other (2022).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 4
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
Delaney Catherine O'brien Aa 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
5Medicare enrollment records show Delaney O'brien reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Grand Rapids, MI 49525
- Reassigned Medicare billing, Michigan enrollment
- 46 clinicians in this Medicare group
Grand Rapids, MI 49525
- Reassigned Medicare billing, Michigan enrollment
- 117 clinicians in this Medicare group
Detroit, MI 48201
- Reassigned Medicare billing, Michigan enrollment
- 29 clinicians in this Medicare group
Toledo, OH 43614
- Reassigned Medicare billing, Ohio enrollment
- 522 clinicians in this Medicare group
Canton, OH 44708
- Reassigned Medicare billing, Ohio enrollment
- 554 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.
University Of Toledo Medical Center
Acute Care Hospitals · Toledo, OHMedicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
GRAND RAPIDS, MI 49503
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 Delaney O'brien's NPI number?
The NPI number for Delaney O'brien is 1629716758. It was assigned to this individual provider in the NPPES registry on May 27, 2022.
Where is Delaney O'brien located?
Delaney O'brien practices at 100 Michigan St NE, Grand Rapids, MI 49503. The listed phone number is (616) 364-4200.
What is Delaney O'brien's specialty?
The primary specialty registered for this NPI is Anesthesiologist Assistant with taxonomy code 367H00000X.
Is Delaney O'brien enrolled in Medicare?
Yes. Delaney O'brien 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 Delaney O'brien's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Delaney O'brien reassigns Medicare benefits to 5 organizations: West Michigan Anesthesia, PC (Grand Rapids, MI), Anesthesia Medical Consultants, PC (Grand Rapids, MI), Pediatric Anesthesia Associates, PC (Detroit, MI), University Of Toledo Physicians, LLC (Toledo, OH) and Ohio Anesthesia Group, Inc (Canton, OH). 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 Delaney O'brien's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Delaney O'brien accept?
Health plans from CareSource list Delaney O'brien 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 Delaney O'brien affiliated with any hospitals?
According to CMS data, Delaney O'brien is affiliated with University Of Toledo Medical Center.
When was this NPI record last updated?
The NPPES record for Delaney O'brien was last updated on October 2, 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.
# Delaney Catherine O'brien, AA · NPI 1629716758
Anesthesiologist Assistant physician in Grand Rapids, Michigan. Individual provider, active in the CMS NPPES registry since May 27, 2022.
## Identity
- **NPI:** 1629716758 (Entity type: Individual)
- **Enumerated:** May 27, 2022
- **Primary specialty:** Anesthesiologist Assistant · taxonomy 367H00000X
- **State license:** 32698139 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 MICHIGAN ST NE, Grand Rapids, MI 49503-2560
- **Phone:** (616) 364-4200
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): West Michigan Anesthesia, PC (NPI 1225016926, Grand Rapids, MI); Anesthesia Medical Consultants, PC (NPI 1063710689, Grand Rapids, MI); Pediatric Anesthesia Associates, PC (NPI 1427093863, Detroit, MI); University Of Toledo Physicians, LLC (NPI 1215240676, Toledo, OH); Ohio Anesthesia Group, Inc (NPI 1639348113, Canton, OH) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2022
## Record status
- **NPPES last updated:** October 2, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1629716758) · Data from the CMS NPPES public registry.