Quick answers
- Which hospitals does Katrina R. Hammel work at?
- Medicare's official clinician data lists Katrina R. Hammel at 5 hospitals: Gundersen Lutheran Medical Center, Gundersen Tri-County Hospital & Clinics, Mayo Clinic Health System Oakridge, Mayo Clinic Health System-Franciscan Medical Center Inc and Winona Health Services. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Katrina R. Hammel see patients?
- Medicare's clinician data lists 1 practice location in Winona, MN. Call before your visit to confirm the address.
- What is Katrina R. Hammel's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Katrina R. Hammel accept Medicare assignment?
- Yes. Medicare's clinician data says Katrina R. Hammel accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Katrina R. Hammel?
- (507) 454-3650, as listed in official Medicare / NPI Registry data.
- What is Katrina R. Hammel's NPI number?
- 1780894527. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Katrina R. Hammel works
Medicare's Facility Affiliation Data lists Katrina R. Hammel at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Gundersen Lutheran Medical CenterLa Crosse, WI · Acute Care Hospital · CCN 520087
- Gundersen Tri-County Hospital & ClinicsWhitehall, WI · Critical Access Hospital · CCN 521316
- Mayo Clinic Health System OakridgeOsseo, WI · Critical Access Hospital · CCN 521302
- Mayo Clinic Health System-Franciscan Medical Center IncLa Crosse, WI · Acute Care Hospital · CCN 520004
- Winona Health ServicesWinona, MN · Acute Care Hospital · CCN 240044
Practice locations
Addresses where Katrina R. Hammel is enrolled with Medicare (CMS data updated 2026-10-02).
- 855 Mankato AveWinona, MN 55987 (507) 454‑3650
Group practices
Medicare enrollment lists Katrina R. Hammel as a member of this group (CMS data updated 2026-10-02).
- Winona Health Services169 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Winona
Clinicians with the same Medicare primary specialty in Winona, MN — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Iowa, Rj & L Carver College Of Medicine |
| Graduation year | 2005 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1780894527 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians