GRANT AUGUST WINTHEISER MD
NPI 1043770092
Internal Medicine - Medical Oncology in Coon Rapids, MN
About Grant August Wintheiser Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GRANT AUGUST WINTHEISER MD (NPI 1043770092) is an individual medical oncology provider in Coon Rapids, Minnesota, licensed in Minnesota (67278) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, is affiliated with Cambridge Medical Center, and is a graduate of Creighton University School Of Medicine (2019).
NPPES Registry Identity
Specialties & Licenses 3
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
Grant August Wintheiser Md 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 Grant Wintheiser reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Coon Rapids, MN 55433
- Reassigned Medicare billing, Minnesota enrollment
- Also billed through NPI 1649576091 (Minnesota)
- 2,609 clinicians in this Medicare group
Cannon Falls, MN 55009
- Reassigned Medicare billing, Minnesota enrollment
- 1,571 clinicians in this Medicare group
Rochester, MN 55905
- Reassigned Medicare billing, Minnesota enrollment
- 6,534 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 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Cambridge Medical Center
Acute Care Hospitals · Cambridge, MNAbbott Northwestern Hospital
Acute Care Hospitals · Minneapolis, MNBuffalo Hospital
Acute Care Hospitals · Buffalo, MNMercy Hospital
Acute Care Hospitals · Coon Rapids, MNPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 55433 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.
COON RAPIDS, MN 55433
COON RAPIDS, MN 55433
COON RAPIDS, MN 55433
COON RAPIDS, MN 55433
COON RAPIDS, MN 55433
COON RAPIDS, MN 55433
COON RAPIDS, MN 55433
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 Grant Wintheiser's NPI number?
The NPI number for Grant Wintheiser is 1043770092. It was assigned to this individual provider in the NPPES registry on March 24, 2019.
Where is Grant Wintheiser located?
Grant Wintheiser practices at 11850 Blackfoot St NW Ste 300, Coon Rapids, MN 55433. The listed phone number is (763) 236-0808.
What is Grant Wintheiser's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.
Is Grant Wintheiser enrolled in Medicare?
Yes. Grant Wintheiser 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 Grant Wintheiser's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Grant Wintheiser reassigns Medicare benefits to 3 organizations: Allina Health System (Coon Rapids, MN), Mayo Clinic Health System-Southeast Minnesota Region (Cannon Falls, MN) and Mayo Clinic (Rochester, MN). 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 Grant Wintheiser's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Grant Wintheiser accept?
Health plans from HealthPartners list Grant Wintheiser 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 Grant Wintheiser affiliated with any hospitals?
According to CMS data, Grant Wintheiser is affiliated with Cambridge Medical Center, Abbott Northwestern Hospital, Buffalo Hospital and Mercy Hospital.
When was this NPI record last updated?
The NPPES record for Grant Wintheiser was last updated on October 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 32 days 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.
# Grant August Wintheiser, MD · NPI 1043770092
Medical Oncology physician in Coon Rapids, Minnesota. Individual provider, active in the CMS NPPES registry since March 24, 2019.
## Identity
- **NPI:** 1043770092 (Entity type: Individual)
- **Enumerated:** March 24, 2019
- **Primary specialty:** Internal Medicine - Medical Oncology · taxonomy 207RX0202X
- **State license:** 67278 (Minnesota)
- **Sole proprietor:** No
## Practice location
- **Address:** 11850 BLACKFOOT ST NW STE 300, Coon Rapids, MN 55433-2772
- **Phone:** (763) 236-0808
## 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): Allina Health System (NPI 1275351413, Coon Rapids, MN); Mayo Clinic Health System-Southeast Minnesota Region (NPI 1497281695, Cannon Falls, MN); Mayo Clinic (NPI 1114343860, Rochester, MN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Creighton University School Of Medicine, class of 2019
## Record status
- **NPPES last updated:** October 1, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1043770092) · Data from the CMS NPPES public registry.