Quick answers
- Does James R. Kosiur accept Medicare assignment?
- Yes. Medicare's clinician data says James R. Kosiur 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 James R. Kosiur's NPI number?
- 1891760286. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where James R. Kosiur works
Medicare's Facility Affiliation Data lists James R. Kosiur 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.
- McKenzie Health SystemSandusky, MI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 231314
Practice locations
Addresses where James R. Kosiur is enrolled with Medicare (CMS data updated October 2, 2026).
- 100 Argyle St, Suite 3Sandusky, MI 48471 (810) 648‑6162
Group practices
Medicare enrollment lists James R. Kosiur as a member of this group (CMS data updated October 2, 2026).
- McKenzie Memorial Hospital29 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Michigan
Clinicians with the same Medicare primary specialty in Michigan — not a recommendation.
Other clinicians in McKenzie Memorial Hospital
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Des Moines University Of Osteopathic Medicine And Health Sciences |
| Graduation year | 1992 (34 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1891760286 |
| 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