Quick answers
- Which hospitals does Ann A. Koss work at?
- Medicare's official clinician data lists Ann A. Koss at 5 hospitals: Corewell Health Big Rapids Hospital, Corewell Health Ludington Hospital, Corewell Health Pennock Hospital, Spectrum Health and Spectrum Health United Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ann A. Koss see patients?
- Medicare's clinician data lists 1 practice location in Ludington, MI. Call before your visit to confirm the address.
- What is Ann A. Koss's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does Ann A. Koss accept Medicare assignment?
- Yes. Medicare's clinician data says Ann A. Koss 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 Ann A. Koss?
- (616) 363-7272, as listed in official Medicare / NPI Registry data.
- What is Ann A. Koss's NPI number?
- 1467488759. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ann A. Koss works
Medicare's Facility Affiliation Data lists Ann A. Koss at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Corewell Health Big Rapids HospitalBig Rapids, MI · Acute Care Hospital · CCN 230093
- Corewell Health Ludington HospitalLudington, MI · Acute Care Hospital · CCN 230110
- Corewell Health Pennock HospitalHastings, MI · Critical Access Hospital · CCN 231339
- Spectrum HealthGrand Rapids, MI · Acute Care Hospital · CCN 230038
- Spectrum Health United HospitalGreenville, MI · Acute Care Hospital · CCN 230035
Practice locations
Addresses where Ann A. Koss is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Atkinson DrLudington, MI 49431 (616) 363‑7272
Group practices
Medicare enrollment lists Ann A. Koss as a member of this group (CMS data updated 2026-10-02).
- Advanced Radiology Services PC253 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Michigan
Clinicians with the same Medicare primary specialty in Michigan — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | At Still University Of Health Sciences, College Of Osteo Med, Kirksville |
| Graduation year | 1990 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1467488759 |
| 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