DR. AARON DANIEL KALLSNICK M.D.
NPI 1003011966
Anesthesiology in Chicago, IL
About Dr. Aaron Daniel Kallsnick M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. AARON DANIEL KALLSNICK M.D. (NPI 1003011966) is an individual anesthesiology provider in Chicago, Illinois, licensed in Wisconsin (64206) and active in the NPI registry since June 2007. He is enrolled in Medicare PECOS, is affiliated with Froedtert South Inc., and is a graduate of University Of Oklahoma College Of Medicine (2003).
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
Dr. Aaron Daniel Kallsnick M.d. 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
3Medicare enrollment records show Aaron Kallsnick reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Pleasant Prairie, WI 53158
- Reassigned Medicare billing, Wisconsin enrollment
- 210 clinicians in this Medicare group
Mount Pleasant, WI 53405
- Reassigned Medicare billing, Wisconsin enrollment
- 162 clinicians in this Medicare group
Saint Louis, MO 63136
- Reassigned Medicare billing, Illinois enrollment
- Medicare enrollment name: Midwest Anesthesia Providers Sc
- 253 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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Froedtert South Inc.
Acute Care Hospitals · Pleasant Prairie, WIAscension All Saints Hospital
Acute Care Hospitals · Racine, WIOther 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 60634
CHICAGO, IL 60634
CHICAGO, IL 60634
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 Aaron Kallsnick's NPI number?
The NPI number for Aaron Kallsnick is 1003011966. It was assigned to this individual provider in the NPPES registry on June 19, 2007.
Where is Aaron Kallsnick located?
Aaron Kallsnick practices at 5645 W Addison St, Chicago, IL 60634. The listed phone number is (773) 282-7000.
What is Aaron Kallsnick's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Aaron Kallsnick enrolled in Medicare?
Yes. Aaron Kallsnick 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 Aaron Kallsnick's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Aaron Kallsnick reassigns Medicare benefits to 3 organizations: Vituity-Wisconsin Anesthesia Sc (Pleasant Prairie, WI), Racine Anesthesia Services, LLC (Mount Pleasant, WI) and Midwest Anesthesia Providers S.C (Saint Louis, MO). 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 Aaron Kallsnick's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Aaron Kallsnick affiliated with any hospitals?
According to CMS data, Aaron Kallsnick is affiliated with Froedtert South Inc. and Ascension All Saints Hospital.
When was this NPI record last updated?
The NPPES record for Aaron Kallsnick was last updated on July 15, 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.
# Dr. Aaron Daniel Kallsnick, M.D. · NPI 1003011966
Anesthesiology physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since June 19, 2007.
## Identity
- **NPI:** 1003011966 (Entity type: Individual)
- **Enumerated:** June 19, 2007
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 64206 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 5645 W ADDISON ST, Chicago, IL 60634-4403
- **Phone:** (773) 282-7000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Vituity-Wisconsin Anesthesia Sc (NPI 1821831975, Pleasant Prairie, WI); Racine Anesthesia Services, LLC (NPI 1467782748, Mount Pleasant, WI); Midwest Anesthesia Providers S.C (NPI 1295189082, Saint Louis, MO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Oklahoma College Of Medicine, class of 2003
## Record status
- **NPPES last updated:** July 15, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1003011966) · Data from the CMS NPPES public registry.