Quick answers
- Which hospitals does Hiroshi Yamagata work at?
- Medicare's official clinician data lists Hiroshi Yamagata at 2 hospitals: Kettering Health Dayton and Riverside Community Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Hiroshi Yamagata see patients?
- Medicare's clinician data lists 1 practice location in Riverside, CA. Call before your visit to confirm the address.
- What is Hiroshi Yamagata's specialty?
- Medicare lists Hematology/Oncology as the primary specialty.
- Does Hiroshi Yamagata accept Medicare assignment?
- Yes. Medicare's clinician data says Hiroshi Yamagata 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 Hiroshi Yamagata?
- (951) 394-7028, as listed in official Medicare / NPI Registry data.
- What is Hiroshi Yamagata's NPI number?
- 1871948950. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Hiroshi Yamagata works
Medicare's Facility Affiliation Data lists Hiroshi Yamagata at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Kettering Health DaytonDayton, OH · Acute Care Hospital · CCN 360133
- Riverside Community HospitalRiverside, CA · Acute Care Hospital · CCN 050022
Practice locations
Addresses where Hiroshi Yamagata is enrolled with Medicare (CMS data updated 2026-10-02).
- 4646 Brockton Ave, Suite 203Riverside, CA 92506 (951) 394‑7028
Group practices
Medicare enrollment lists Hiroshi Yamagata as a member of this group (CMS data updated 2026-10-02).
- The Oncology Institute Ca, a Professional Corporation113 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Other hematologist-oncologists in Riverside
Clinicians with the same Medicare primary specialty in Riverside, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loma Linda University School Of Medicine |
| Graduation year | 2016 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1871948950 |
| 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