Quick answers
- Which hospitals does Roy D. Miller work at?
- Medicare's official clinician data lists Roy D. Miller at 1 hospital: MercyOne North Iowa Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Roy D. Miller see patients?
- Medicare's clinician data lists 1 practice location in Mason City, IA. Call before your visit to confirm the address.
- What is Roy D. Miller's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Roy D. Miller accept Medicare assignment?
- Yes. Medicare's clinician data says Roy D. Miller 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 Roy D. Miller's NPI number?
- 1568099844. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Roy D. Miller works
Medicare's Facility Affiliation Data lists Roy D. Miller 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
Practice locations
Addresses where Roy D. Miller is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 4th St SWMason City, IA 50401
Group practices
Medicare enrollment lists Roy D. Miller as a member of this group (CMS data updated 2026-10-02).
- North Iowa Mercy Clinics302 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Mason City
Clinicians with the same Medicare primary specialty in Mason City, IA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2020 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1568099844 |
| 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