CARRI ANN GRENNAN CRNA
NPI 1396024931
Nurse Anesthetist, Certified Registered in Chicago, IL
About Carri Ann Grennan Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CARRI ANN GRENNAN CRNA (NPI 1396024931) is an individual nurse anesthetist, certified registered in Chicago, Illinois, licensed in Illinois (209.008958) and active in the NPI registry since August 2011. She is enrolled in Medicare PECOS and is a graduate of Other (2005).
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
Carri Ann Grennan 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
6Medicare enrollment records show Carri Grennan reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chicago, IL 60625
- Reassigned Medicare billing, Illinois enrollment
- 350 clinicians in this Medicare group
Chicago, IL 60657
- Reassigned Medicare billing, Illinois enrollment
- 385 clinicians in this Medicare group
Aurora, IL 60502
- Reassigned Medicare billing, Illinois enrollment
- 101 clinicians in this Medicare group
Glendora, CA 91740
- Reassigned Medicare billing, California enrollment
- 43 clinicians in this Medicare group
Arcadia, CA 91006
- Reassigned Medicare billing, California enrollment
- 72 clinicians in this Medicare group
Pasadena, CA 91105
- Reassigned Medicare billing, California enrollment
- 214 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 4
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60625 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.
CHICAGO, IL 60625
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 Carri Grennan's NPI number?
The NPI number for Carri Grennan is 1396024931. It was assigned to this individual provider in the NPPES registry on August 14, 2011.
Where is Carri Grennan located?
Carri Grennan practices at 5145 N California Ave, Chicago, IL 60625. The listed phone number is (773) 878-8200.
What is Carri Grennan's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Carri Grennan enrolled in Medicare?
Yes. Carri Grennan 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 Carri Grennan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Carri Grennan reassigns Medicare benefits to 6 organizations: Swedish Covenant Management Services, Inc. (Chicago, IL), Midwest Anesthesia Partners, LLC (Chicago, IL), Anesthesia Associates, Ltd (Aurora, IL), Glendora Anesthesia Associates LP (Glendora, CA), Amsurg Arcadia Anesthesia LP (Arcadia, CA) and 1 more organization, 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 Carri Grennan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Carri Grennan was last updated on July 15, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.
# Carri Ann Grennan, CRNA · NPI 1396024931
Nurse Anesthetist, Certified Registered physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since August 14, 2011.
## Identity
- **NPI:** 1396024931 (Entity type: Individual)
- **Enumerated:** August 14, 2011
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** 209.008958 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 5145 N CALIFORNIA AVE, Chicago, IL 60625-3661
- **Phone:** (773) 878-8200 · **Fax:** (773) 293-8804
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging
- **Bills Medicare through:** 6 organizations under Medicare reassignment (form CMS-855R): Swedish Covenant Management Services, Inc. (NPI 1760432348, Chicago, IL); Midwest Anesthesia Partners, LLC (NPI 1255380184, Chicago, IL); Anesthesia Associates, Ltd (NPI 1952308223, Aurora, IL); Glendora Anesthesia Associates LP (NPI 1750748331, Glendora, CA); Amsurg Arcadia Anesthesia LP (NPI 1114291226, Arcadia, CA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2005
## Record status
- **NPPES last updated:** July 15, 2016
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Source: [NPI Profile](https://npiprofile.com/npi/1396024931) · Data from the CMS NPPES public registry.