MRS. WENDY ANNETTE GRIGG CRNA
NPI 1265896492
Nurse Anesthetist, Certified Registered in Ann Arbor, MI
About Mrs. Wendy Annette Grigg Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. WENDY ANNETTE GRIGG CRNA (NPI 1265896492) is an individual nurse anesthetist, certified registered in Ann Arbor, Michigan, licensed in Michigan (4704216973) and active in the NPI registry since April 2016. She is affiliated with Saint Joseph Mercy Livingston Hospital, maintains 2 additional practice locations, and is a graduate of Other (2016).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
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
Mrs. Wendy Annette Grigg 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
7Medicare enrollment records show Wendy Grigg reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Ann Arbor, MI 48109
- Reassigned Medicare billing, Michigan enrollment
- 277 clinicians in this Medicare group
Ypsilanti, MI 48197
- Reassigned Medicare billing, Michigan enrollment
- 151 clinicians in this Medicare group
Jackson, MI 49201
- Reassigned Medicare billing, Michigan enrollment
- 107 clinicians in this Medicare group
Grand Blanc, MI 48439
- Reassigned Medicare billing, Michigan enrollment
- 30 clinicians in this Medicare group
Mount Clemens, MI 48043
- Reassigned Medicare billing, Michigan enrollment
- 112 clinicians in this Medicare group
Lansing, MI 48912
- Reassigned Medicare billing, Michigan enrollment
- 265 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.
Areas of Expertise CMS Part B claims 3
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Saint Joseph Mercy Livingston Hospital
Acute Care Hospitals · Howell, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48109 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.
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
ANN ARBOR, MI 48109
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 Wendy Grigg's NPI number?
The NPI number for Wendy Grigg is 1265896492. It was assigned to this individual provider in the NPPES registry on April 13, 2016.
Where is Wendy Grigg located?
Wendy Grigg practices at 1500 E Medical Center Dr, Ann Arbor, MI 48109. The listed phone number is (734) 936-4000.
What is Wendy Grigg's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Wendy Grigg enrolled in Medicare?
Yes. Wendy Grigg 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 Wendy Grigg's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Wendy Grigg reassigns Medicare benefits to 7 organizations: Regents Of The University Of Michigan (Ann Arbor, MI), Sjmhs Anesthesia Services (Ypsilanti, MI), W.A. Foote Memorial Hospital (Jackson, MI), The Center For Gastrointestinal Health At Health Park LLC (Grand Blanc, MI), Glps Staffing Solutions LLC (Mount Clemens, MI) and 2 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 Wendy Grigg's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Wendy Grigg accept?
Health plans from Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company list Wendy Grigg 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 Wendy Grigg affiliated with any hospitals?
According to CMS data, Wendy Grigg is affiliated with Saint Joseph Mercy Livingston Hospital.
When was this NPI record last updated?
The NPPES record for Wendy Grigg was last updated on September 29, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Mrs. Wendy Annette Grigg, CRNA · NPI 1265896492
Nurse Anesthetist, Certified Registered physician in Ann Arbor, Michigan. Individual provider, active in the CMS NPPES registry since April 13, 2016.
## Identity
- **NPI:** 1265896492 (Entity type: Individual)
- **Enumerated:** April 13, 2016
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** 4704216973 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 1500 E MEDICAL CENTER DR, Ann Arbor, MI 48109-5000
- **Phone:** (734) 936-4000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 7 organizations under Medicare reassignment (form CMS-855R): Regents Of The University Of Michigan (NPI 1528010428, Ann Arbor, MI); Sjmhs Anesthesia Services (NPI 1508201617, Ypsilanti, MI); W.A. Foote Memorial Hospital (NPI 1598776718, Jackson, MI); The Center For Gastrointestinal Health At Health Park LLC (NPI 1437107844, Grand Blanc, MI); Glps Staffing Solutions LLC (NPI 1750797015, Mount Clemens, MI); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** September 29, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1265896492) · Data from the CMS NPPES public registry.