Quick answers
- Which hospitals does Guy C. Leonard work at?
- Medicare's official clinician data lists Guy C. Leonard at 3 hospitals: Firelands Regional Medical Center, Mercy Allen Hospital and Mercy Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Guy C. Leonard see patients?
- Medicare's clinician data lists 2 practice locations, including Bellevue, OH and Oberlin, OH. Call before your visit to confirm the address.
- What is Guy C. Leonard's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Guy C. Leonard accept Medicare assignment?
- Yes. Medicare's clinician data says Guy C. Leonard 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 Guy C. Leonard?
- (419) 483-4040, as listed in official Medicare / NPI Registry data.
- What is Guy C. Leonard's NPI number?
- 1407599889. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Guy C. Leonard works
Medicare's Facility Affiliation Data lists Guy C. Leonard at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Firelands Regional Medical CenterSandusky, OH · Acute Care Hospital · CCN 360025
- Mercy Allen HospitalOberlin, OH · Critical Access Hospital · CCN 361306
- Mercy Regional Medical CenterLorain, OH · Acute Care Hospital · CCN 360172
Practice locations
Addresses where Guy C. Leonard is enrolled with Medicare (CMS data updated 2026-10-02).
- 1400 W Main StBellevue, OH 44811 (419) 483‑4040
- 200 W Lorain StOberlin, OH 44074 (440) 775‑1211
Group practices
Medicare enrollment lists Guy C. Leonard as a member of these groups (CMS data updated 2026-10-02).
- Community Hospitalist LLC52 clinicians in the group
- Hni Medical Services of Ohio, LLC38 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Ohio
Clinicians with the same Medicare primary specialty in Ohio — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2022 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1407599889 |
| 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