Quick answers
- Which hospitals does Mason S. Hoying work at?
- Medicare's official clinician data lists Mason S. Hoying at 5 hospitals: Grand Lake Health System, Institute for Orthopaedic Surgery, Lima Memorial Health System, Mercer County Joint Township Community Hospital and Mercy Health St Ritas Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mason S. Hoying see patients?
- Medicare's clinician data lists 5 practice locations, including Saint Marys, OH, Coldwater, OH and Lima, OH. Call before your visit to confirm the address.
- What is Mason S. Hoying's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Mason S. Hoying accept Medicare assignment?
- Yes. Medicare's clinician data says Mason S. Hoying 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 Mason S. Hoying?
- (419) 394-4636, as listed in official Medicare / NPI Registry data.
- What is Mason S. Hoying's NPI number?
- 1396226247. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mason S. Hoying works
Medicare's Facility Affiliation Data lists Mason S. Hoying at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Grand Lake Health SystemSaint Marys, OH · Acute Care Hospital · CCN 360032
- Institute for Orthopaedic SurgeryLima, OH · Acute Care Hospital · CCN 360263
- Lima Memorial Health SystemLima, OH · Acute Care Hospital · CCN 360009
- Mercer County Joint Township Community HospitalColdwater, OH · Acute Care Hospital · CCN 360058
- Mercy Health St Ritas Medical CenterLima, OH · Acute Care Hospital · CCN 360066
Practice locations
Addresses where Mason S. Hoying is enrolled with Medicare (CMS data updated 2026-10-02).
- 1275 Greenville RdSaint Marys, OH 45885 (419) 394‑4636
- 200 Saint Clair AveSaint Marys, OH 45885 (419) 222‑6622
- 800 W Main StColdwater, OH 45828 (419) 678‑2341
- 801 Medical DrLima, OH 45804 (419) 222‑6622
- 900 Havemann Rd, Suite DCelina, OH 45822 (419) 996‑5852
Group practices
Medicare enrollment lists Mason S. Hoying as a member of these groups (CMS data updated 2026-10-02).
- Mercy Health Physicians Lima Specialty Care LLC253 clinicians in the group
- Orthopaedic Institute of Ohio, Inc75 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Saint Marys
Clinicians with the same Medicare primary specialty in Saint Marys, OH — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2018 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1396226247 |
| 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