CATHERINE RENEE ERSIG CRNA
NPI 1215232863
Nurse Anesthetist, Certified Registered in Saginaw, MI
About Catherine Renee Ersig Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CATHERINE RENEE ERSIG CRNA (NPI 1215232863) is an individual nurse anesthetist, certified registered in Saginaw, Michigan, licensed in Michigan (4704251530) and active in the NPI registry since January 2011. She is affiliated with Trinity Health Oakland Hospital, maintains a secondary practice location in Pontiac, and is a graduate of Other (2010).
NPPES Registry Identity
Specialties & Licenses
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
Catherine Renee Ersig 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
9Medicare enrollment records show Catherine Ersig reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saginaw, MI 48602
- Reassigned Medicare billing, Michigan enrollment
- 126 clinicians in this Medicare group
Saginaw, MI 48604
- Reassigned Medicare billing, Michigan enrollment
- 38 clinicians in this Medicare group
Saginaw, MI 48604
- Reassigned Medicare billing, Michigan enrollment
- 55 clinicians in this Medicare group
Saginaw, MI 48604
- Reassigned Medicare billing, Michigan enrollment
- 178 clinicians in this Medicare group
Lake Orion, MI 48360
- Reassigned Medicare billing, Michigan enrollment
- 51 clinicians in this Medicare group
Troy, MI 48098
- Reassigned Medicare billing, Michigan enrollment
- 131 clinicians in this Medicare group
Troy, MI 48098
- Reassigned Medicare billing, Michigan enrollment
- 176 clinicians in this Medicare group
Westland, MI 48186
- Reassigned Medicare billing, Michigan enrollment
- 273 clinicians in this Medicare group
Irving, TX 75038
- Reassigned Medicare billing, Michigan enrollment
- 283 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 5
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.
Trinity Health Oakland Hospital
Acute Care Hospitals · Pontiac, MICovenant Medical Center
Acute Care Hospitals · Saginaw, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48602 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.
SAGINAW, MI 48602
SAGINAW, MI 48602
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 Catherine Ersig's NPI number?
The NPI number for Catherine Ersig is 1215232863. It was assigned to this individual provider in the NPPES registry on January 12, 2011.
Where is Catherine Ersig located?
Catherine Ersig practices at 1447 N Harrison St, Saginaw, MI 48602. The listed phone number is (989) 583-6237.
What is Catherine Ersig's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Catherine Ersig enrolled in Medicare?
Yes. Catherine Ersig 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 Catherine Ersig's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Catherine Ersig reassigns Medicare benefits to 9 organizations: Covenant Medical Center, Inc. (Saginaw, MI), Resource Anesthesiology Associates Of Mid Michigan PC (Saginaw, MI), Anesthesia Associates Of The Lower Peninsula PC (Saginaw, MI), Resource Anesthesiology Associates Of Mi PC (Saginaw, MI), Axon Anesthesia Consultants, Plc (Lake Orion, MI) and 4 more organizations, listed in the Medicare section above. 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 Catherine Ersig's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Catherine Ersig affiliated with any hospitals?
According to CMS data, Catherine Ersig is affiliated with Trinity Health Oakland Hospital and Covenant Medical Center.
When was this NPI record last updated?
The NPPES record for Catherine Ersig was last updated on August 16, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Catherine Renee Ersig, CRNA · NPI 1215232863
Nurse Anesthetist, Certified Registered physician in Saginaw, Michigan. Individual provider, active in the CMS NPPES registry since January 12, 2011.
## Identity
- **NPI:** 1215232863 (Entity type: Individual)
- **Enumerated:** January 12, 2011
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** 4704251530 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 1447 N HARRISON ST, Saginaw, MI 48602-4727
- **Phone:** (989) 583-6237 · **Fax:** (989) 583-6032
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 9 organizations under Medicare reassignment (form CMS-855R): Covenant Medical Center, Inc. (NPI 1225151897, Saginaw, MI); Resource Anesthesiology Associates Of Mid Michigan PC (NPI 1104617786, Saginaw, MI); Anesthesia Associates Of The Lower Peninsula PC (NPI 1740152412, Saginaw, MI); Resource Anesthesiology Associates Of Mi PC (NPI 1568755882, Saginaw, MI); Axon Anesthesia Consultants, Plc (NPI 1235643495, Lake Orion, MI); and 4 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2010
## Record status
- **NPPES last updated:** August 16, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1215232863) · Data from the CMS NPPES public registry.