Quick answers
- Which hospitals does Gregory A. Gilmore work at?
- Medicare's official clinician data lists Gregory A. Gilmore at 2 hospitals: Corona Regional Medical Center and Riverside Community Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory A. Gilmore see patients?
- Medicare's clinician data lists 6 practice locations, including Upland, CA, Duarte, CA and South Pasadena, CA. Call before your visit to confirm the address.
- What is Gregory A. Gilmore's specialty?
- Medicare lists Hematology/Oncology as the primary specialty.
- Does Gregory A. Gilmore accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory A. Gilmore 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 Gregory A. Gilmore offer telehealth?
- Medicare's clinician data says Gregory A. Gilmore offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Gregory A. Gilmore?
- (909) 949-2242, as listed in official Medicare / NPI Registry data.
- What is Gregory A. Gilmore's NPI number?
- 1205271640. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregory A. Gilmore works
Medicare's Facility Affiliation Data lists Gregory A. Gilmore at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Corona Regional Medical CenterCorona, CA · Acute Care Hospital · CCN 050329
- Riverside Community HospitalRiverside, CA · Acute Care Hospital · CCN 050022
Practice locations
Addresses where Gregory A. Gilmore is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 1100 San Bernardino Rd, Suite 1100Upland, CA 91786 (909) 949‑2242
- 1500 Duarte RdDuarte, CA 91010 (626) 256‑4673
- 1500 E Duarte RdDuarte, CA 91010
- 209 Fair Oaks AveSouth Pasadena, CA 91030 (626) 396‑2900
- 320 W 6th StCorona, CA 92882 (951) 898‑2828
Group practices
Medicare enrollment lists Gregory A. Gilmore as a member of this group (CMS data updated 2026-10-02).
- City of Hope Medical Foundation982 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Other hematologist-oncologists in Upland
Clinicians with the same Medicare primary specialty in Upland, CA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2013 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1205271640 |
| 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