Quick answers
- Which hospitals does Martin Frey work at?
- Medicare's official clinician data lists Martin Frey at 4 hospitals: Aspirus Rhinelander Hospital, Aspirus Wausau Hospital, Sanford Medical Center Bismarck and UnityPoint Health - Des Moines Iowa Methodist Medi…. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Martin Frey see patients?
- Medicare's clinician data lists 3 practice locations, including Des Moines, IA and Wausau, WI. Call before your visit to confirm the address.
- What is Martin Frey's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty.
- Does Martin Frey accept Medicare assignment?
- Yes. Medicare's clinician data says Martin Frey 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 Martin Frey?
- (515) 241-5700, as listed in official Medicare / NPI Registry data.
- What is Martin Frey's NPI number?
- 1164424719. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Martin Frey works
Medicare's Facility Affiliation Data lists Martin Frey at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Aspirus Rhinelander HospitalRhinelander, WI · Acute Care Hospital · CCN 520019
- Aspirus Wausau HospitalWausau, WI · Acute Care Hospital · CCN 520030
- Sanford Medical Center BismarckBismarck, ND · Acute Care Hospital · CCN 350015
- UnityPoint Health - Des Moines Iowa Methodist Medi…Des Moines, IA · Acute Care Hospital · CCN 160082
Practice locations
Addresses where Martin Frey is enrolled with Medicare (CMS data updated 2026-10-02).
- 1215 Pleasant St, Suite 414Des Moines, IA 50309 (515) 241‑5700
- 1301 Pennsylvania Ave, Suite 100Des Moines, IA 50316 (515) 241‑5700
- 500 Wind Ridge DrWausau, WI 54401 (715) 847‑2611
Group practices
Medicare enrollment lists Martin Frey as a member of these groups (CMS data updated 2026-10-02).
- Aspirus Medical Group, Inc.268 clinicians in the group
- Central Iowa Hospital Corporation239 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Iowa →
Other cardiologists in Des Moines
Clinicians with the same Medicare primary specialty in Des Moines, IA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1983 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1164424719 |
| 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