Quick answers
- Does Katharine D. Van Fossen accept Medicare assignment?
- Yes. Medicare's clinician data says Katharine D. Van Fossen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Katharine D. Van Fossen's NPI number?
- 1356316483. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Katharine D. Van Fossen is enrolled with Medicare (CMS data updated October 2, 2026).
- 135 S Gibson StMedford, WI 54451 (715) 748‑8100
- 143 S Gibson StMedford, WI 54451 (715) 748‑8100
- 2555 N Dr Martin Luther King DrMilwaukee, WI 53212 (414) 372‑8080
- 2555 N Dr Martin Luther King Jr DrMilwaukee, WI 53212
- 8200 W Silver Spring DrMilwaukee, WI 53218 (414) 760‑3900
Group practices
Medicare enrollment lists Katharine D. Van Fossen as a member of these groups (CMS data updated October 2, 2026).
- Aspirus Medford Hospital and Clinics Inc119 clinicians in the group
- Milwaukee Health Services, Inc.25 clinicians in the group
Specialties
- Gynecological Oncologyprimary
- Obstetrics/Gynecologyalso
Other gynecologic oncologists in Wisconsin
Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.
Other clinicians in Aspirus Medford Hospital and Clinics Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1991 (35 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1356316483 |
| 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
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- 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