Quick answers
- Which hospitals does John Leone work at?
- Medicare's official clinician data lists John Leone at 3 hospitals: Kaleida Health, Kenmore Mercy Hospital and Sisters of Charity Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John Leone see patients?
- Medicare's clinician data lists 1 practice location in Williamsville, NY. Call before your visit to confirm the address.
- What is John Leone's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does John Leone accept Medicare assignment?
- Yes. Medicare's clinician data says John Leone 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 John Leone?
- (716) 565-1234, as listed in official Medicare / NPI Registry data.
- What is John Leone's NPI number?
- 1871558825. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John Leone works
Medicare's Facility Affiliation Data lists John Leone at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Kaleida HealthBuffalo, NY · Acute Care Hospital · CCN 330005
- Kenmore Mercy HospitalKenmore, NY · Acute Care Hospital · CCN 330102
- Sisters of Charity HospitalBuffalo, NY · Acute Care Hospital · CCN 330078
Practice locations
Addresses where John Leone is enrolled with Medicare (CMS data updated 2026-10-02).
- 61 Maple RdWilliamsville, NY 14221 (716) 565‑1234
Group practices
Medicare enrollment lists John Leone as a member of this group (CMS data updated 2026-10-02).
- Family Care Physician, P.C.12 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Williamsville
Clinicians with the same Medicare primary specialty in Williamsville, NY — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | New York College Of Osteo Medicine Of New York Institute Of Technology |
| Graduation year | 1987 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1871558825 |
| 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