Quick answers
- Which hospitals does Bryon C. Mason work at?
- Medicare's official clinician data lists Bryon C. Mason at 5 hospitals: Dallas County Hospital, Grinnell Regional Medical Center, Mary Greeley Medical Center, MercyOne Des Moines Medical Center and UnityPoint Health - Des Moines Iowa Methodist Medi…. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Bryon C. Mason see patients?
- Medicare's clinician data lists 3 practice locations, including Des Moines, IA and Grinnell, IA. Call before your visit to confirm the address.
- What is Bryon C. Mason's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Bryon C. Mason accept Medicare assignment?
- Yes. Medicare's clinician data says Bryon C. Mason 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 Bryon C. Mason?
- (515) 241-4019, as listed in official Medicare / NPI Registry data.
- What is Bryon C. Mason's NPI number?
- 1124479472. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Bryon C. Mason works
Medicare's Facility Affiliation Data lists Bryon C. Mason at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Dallas County HospitalPerry, IA · Critical Access Hospital · CCN 161322
- Grinnell Regional Medical CenterGrinnell, IA · Acute Care Hospital · CCN 160147
- Mary Greeley Medical CenterAmes, IA · Acute Care Hospital · CCN 160030
- MercyOne Des Moines Medical CenterDes Moines, IA · Acute Care Hospital · CCN 160083
- UnityPoint Health - Des Moines Iowa Methodist Medi…Des Moines, IA · Acute Care Hospital · CCN 160082
Practice locations
Addresses where Bryon C. Mason is enrolled with Medicare (CMS data updated 2026-10-02).
- 1215 Pleasant St, Suite 400Des Moines, IA 50309 (515) 241‑4019
- 202 4th Ave, Fl 2Grinnell, IA 50112 (641) 236‑2925
- 210 4th AveGrinnell, IA 50112 (641) 236‑7511
Group practices
Medicare enrollment lists Bryon C. Mason as a member of these groups (CMS data updated 2026-10-02).
- Iowa Physicians Clinic Medical Foundation1,246 clinicians in the group
- Grinnell Regional Medical Center105 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Des Moines
Clinicians with the same Medicare primary specialty in Des Moines, IA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2016 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1124479472 |
| 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