Quick answers
- Which hospitals does Diana M. Kellar work at?
- Medicare's official clinician data lists Diana M. Kellar at 3 hospitals: HMHP St Elizabeth Boardman Health Center, MH St Elizabeth Youngstown Hospital and MH St Joseph Warren Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Diana M. Kellar see patients?
- Medicare's clinician data lists 1 practice location in Vienna, OH. Call before your visit to confirm the address.
- What is Diana M. Kellar's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Diana M. Kellar accept Medicare assignment?
- Yes. Medicare's clinician data says Diana M. Kellar 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.
- Does Diana M. Kellar offer telehealth?
- Medicare's clinician data says Diana M. Kellar offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Diana M. Kellar?
- (330) 399-2500, as listed in official Medicare / NPI Registry data.
- What is Diana M. Kellar's NPI number?
- 1801238084. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Diana M. Kellar works
Medicare's Facility Affiliation Data lists Diana M. Kellar at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- HMHP St Elizabeth Boardman Health CenterBoardman, OH · Acute Care Hospital · CCN 360276
- MH St Elizabeth Youngstown HospitalYoungstown, OH · Acute Care Hospital · CCN 360064
- MH St Joseph Warren HospitalWarren, OH · Acute Care Hospital · CCN 360161
Practice locations
Addresses where Diana M. Kellar is enrolled with Medicare (CMS data updated 2026-10-02).
- 341 Youngstown Kingsville Rd SEVienna, OH 44473 (330) 399‑2500
Group practices
Medicare enrollment lists Diana M. Kellar as a member of this group (CMS data updated 2026-10-02).
- Mercy Health Physicians Youngstown, LLC119 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Ohio
Clinicians with the same Medicare primary specialty in Ohio — not a recommendation.
Clinician information
| Graduation year | 2013 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1801238084 |
| 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