DR. ALEX GRUNENWALD D.O
NPI 1992243984
Emergency Medicine in Bloomington, MN
About Dr. Alex Grunenwald D.o NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ALEX GRUNENWALD D.O (NPI 1992243984) is an individual emergency medicine provider in Bloomington, Minnesota, licensed in Wisconsin (72447) and active in the NPI registry since February 2017. He is enrolled in Medicare PECOS, is affiliated with Mercy Hospital, and is a graduate of Kansas City University Of Med & Biosciences, College Of Osteo Med (2017).
NPPES Registry Identity
Specialties & Licenses
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
Dr. Alex Grunenwald D.o 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
10Medicare enrollment records show Alex Grunenwald reassigns Medicare billing to 10 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Bloomington, MN 55435
- Reassigned Medicare billing, Minnesota enrollment
- 328 clinicians in this Medicare group
Osceola, WI 54020
- Reassigned Medicare billing, Wisconsin enrollment
- 170 clinicians in this Medicare group
La Crosse, WI 54601
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1841278637 (Wisconsin)
- 1,003 clinicians in this Medicare group
Marshfield, WI 54449
- Reassigned Medicare billing, Wisconsin enrollment
- 397 clinicians in this Medicare group
Mauston, WI 53948
- Reassigned Medicare billing, Wisconsin enrollment
- 189 clinicians in this Medicare group
Tomahawk, WI 54487
- Reassigned Medicare billing, Wisconsin enrollment
- 935 clinicians in this Medicare group
Woodruff, WI 54568
- Reassigned Medicare billing, Wisconsin enrollment
- Medicare enrollment name: Howard Young Medical Center Inc Of Woodruff Wisconsin
- 358 clinicians in this Medicare group
Eagle River, WI 54521
- Reassigned Medicare billing, Wisconsin enrollment
- 262 clinicians in this Medicare group
Noblesville, IN 46060
- Reassigned Medicare billing, Indiana enrollment
- 303 clinicians in this Medicare group
Tulsa, OK 74136
- Reassigned Medicare billing, Oklahoma enrollment
- 263 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.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Hospital
Acute Care Hospitals · Coon Rapids, MNSaint Francis Hospital Muskogee
Acute Care Hospitals · Muskogee, OKSaint Francis Hospital South, LLC
Acute Care Hospitals · Tulsa, OKMile Bluff Medical Center
Acute Care Hospitals · Mauston, WILadd Memorial Hospital
Critical Access Hospitals · Osceola, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 55435 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.
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 Alex Grunenwald's NPI number?
The NPI number for Alex Grunenwald is 1992243984. It was assigned to this individual provider in the NPPES registry on February 9, 2017.
Where is Alex Grunenwald located?
Alex Grunenwald practices at 4300 Market Pte Dr Ste 100, Bloomington, MN 55435. The listed phone number is (952) 767-4574.
What is Alex Grunenwald's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Alex Grunenwald enrolled in Medicare?
Yes. Alex Grunenwald 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 Alex Grunenwald's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alex Grunenwald reassigns Medicare benefits to 10 organizations: Emergency Physicians Professional Association (Bloomington, MN), Ladd Memorial Hospital (Osceola, WI), Mayo Clinic Health System-Southwest Wisconsin Region, Inc. (La Crosse, WI), Aspirus Riverview Hospital & Clinics, Inc. (Marshfield, WI), Mile Bluff Medical Center Inc (Mauston, WI) and 5 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 Alex Grunenwald's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Alex Grunenwald accept?
Health plans from CareSource list Alex Grunenwald 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 Alex Grunenwald affiliated with any hospitals?
According to CMS data, Alex Grunenwald is affiliated with Mercy Hospital, Saint Francis Hospital Muskogee, Saint Francis Hospital South, LLC, Mile Bluff Medical Center and Ladd Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Alex Grunenwald was last updated on February 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months 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. Alex Grunenwald, D.O · NPI 1992243984
Emergency Medicine physician in Bloomington, Minnesota. Individual provider, active in the CMS NPPES registry since February 9, 2017.
## Identity
- **NPI:** 1992243984 (Entity type: Individual)
- **Enumerated:** February 9, 2017
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 72447 (Wisconsin)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 4300 MARKET PTE DR STE 100, Bloomington, MN 55435-5435
- **Phone:** (952) 767-4574
## 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:** 10 organizations under Medicare reassignment (form CMS-855R): Emergency Physicians Professional Association (NPI 1801871934, Bloomington, MN); Ladd Memorial Hospital (NPI 1467560227, Osceola, WI); Mayo Clinic Health System-Southwest Wisconsin Region, Inc. (NPI 1629056049, La Crosse, WI); Aspirus Riverview Hospital & Clinics, Inc. (NPI 1124633870, Marshfield, WI); Mile Bluff Medical Center Inc (NPI 1881930527, Mauston, WI); and 5 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Kansas City University Of Med & Biosciences, College Of Osteo Med, class of 2017
## Record status
- **NPPES last updated:** February 4, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1992243984) · Data from the CMS NPPES public registry.