Quick answers
- Which hospitals does Phillip M. Grigsby work at?
- Medicare's official clinician data lists Phillip M. Grigsby at 5 hospitals: Loma Linda University Medical Center, PIH Health Downey Hospital, PIH Health Good Samaritan Hospital, PIH Health Hospital-Whittier and Southwest Healthcare Rancho Springs Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Phillip M. Grigsby see patients?
- Medicare's clinician data lists 7 practice locations, including Loma Linda, CA, Downey, CA and Los Angeles, CA. Call before your visit to confirm the address.
- What is Phillip M. Grigsby's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does Phillip M. Grigsby accept Medicare assignment?
- Yes. Medicare's clinician data says Phillip M. Grigsby 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 Phillip M. Grigsby?
- (562) 904-5000, as listed in official Medicare / NPI Registry data.
- What is Phillip M. Grigsby's NPI number?
- 1740716539. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Phillip M. Grigsby works
Medicare's Facility Affiliation Data lists Phillip M. Grigsby at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Loma Linda University Medical CenterLoma Linda, CA · Acute Care Hospital · CCN 050327
- PIH Health Downey HospitalDowney, CA · Acute Care Hospital · CCN 050393
- PIH Health Good Samaritan HospitalLos Angeles, CA · Acute Care Hospital · CCN 050471
- PIH Health Hospital-WhittierWhittier, CA · Acute Care Hospital · CCN 050169
- Southwest Healthcare Rancho Springs HospitalMurrieta, CA · Acute Care Hospital · CCN 050701
Practice locations
Addresses where Phillip M. Grigsby is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 7; the Medicare profile lists all.
- 11234 Anderson StLoma Linda, CA 92354
- 11370 Anderson StLoma Linda, CA 92354
- 11500 Brookshire AveDowney, CA 90241 (562) 904‑5000
- 1225 Wilshire BlvdLos Angeles, CA 90017 (888) 927‑8024
- 18586 Calera LnHuntington Beach, CA 92648 (562) 698‑0811
Group practices
Medicare enrollment lists Phillip M. Grigsby as a member of these groups (CMS data updated 2026-10-02).
- Faculty Physicians and Surgeons of Llusm1,315 clinicians in the group
- Lambert Radiology Medical Group Inc67 clinicians in the group
- Universal Radiology Partners of California PC66 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Loma Linda
Clinicians with the same Medicare primary specialty in Loma Linda, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loma Linda University School Of Medicine |
| Graduation year | 2017 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1740716539 |
| 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