Quick answers
- Which hospitals does Nathan C. Froehner work at?
- Medicare's official clinician data lists Nathan C. Froehner at 2 hospitals: MercyOne North Iowa Medical Center and Waverly Health Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Nathan C. Froehner see patients?
- Medicare's clinician data lists 2 practice locations, including Mason City, IA and Waverly, IA. Call before your visit to confirm the address.
- What is Nathan C. Froehner's specialty?
- Medicare lists Certified Registered Nurse Anesthetist (CRNA) as the primary specialty.
- Does Nathan C. Froehner accept Medicare assignment?
- Yes. Medicare's clinician data says Nathan C. Froehner 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 Nathan C. Froehner?
- (319) 352-4120, as listed in official Medicare / NPI Registry data.
- What is Nathan C. Froehner's NPI number?
- 1699015164. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Nathan C. Froehner works
Medicare's Facility Affiliation Data lists Nathan C. Froehner at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- MercyOne North Iowa Medical CenterMason City, IA · Acute Care Hospital · CCN 160064
- Waverly Health CenterWaverly, IA · Critical Access Hospital · CCN 161339
Practice locations
Addresses where Nathan C. Froehner is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 4th St SWMason City, IA 50401
- 312 9th St SWWaverly, IA 50677 (319) 352‑4120
Group practices
Medicare enrollment lists Nathan C. Froehner as a member of these groups (CMS data updated 2026-10-02).
- North Iowa Mercy Clinics302 clinicians in the group
- Waverly Health Center44 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), Iowa →
Other nurse anesthetists in Mason City
Clinicians with the same Medicare primary specialty in Mason City, IA — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Graduation year | 2012 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1699015164 |
| 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