Quick answers
- Does Katharine Walser accept Medicare assignment?
- Yes. Medicare's clinician data says Katharine Walser 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 Walser's NPI number?
- 1023849320. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Katharine Walser works
Medicare's Facility Affiliation Data lists Katharine Walser at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Oswego HospitalOswego, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330218
Practice locations
Addresses where Katharine Walser is enrolled with Medicare (CMS data updated October 2, 2026).
- 29 E Cayuga StOswego, NY 13126 (315) 326‑4100
Group practices
Medicare enrollment lists Katharine Walser as a member of this group (CMS data updated October 2, 2026).
- Oswego Hospital60 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Oswego
Clinicians with the same Medicare primary specialty in Oswego, NY — not a recommendation.
Other clinicians in Oswego Hospital
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| School | State University Of Ny Upstate Medical University |
|---|---|
| Graduation year | 2022 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1023849320 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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