Quick answers
- Which hospitals does Leo E. Orr work at?
- Medicare's official clinician data lists Leo E. Orr at 4 hospitals: Adventist Health White Memorial, California Hospital Medical Center LA, Marian Regional Medical Center and PIH Health Good Samaritan Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Leo E. Orr see patients?
- Medicare's clinician data lists 6 practice locations, including Montebello, CA, Fountain Valley, CA and Los Angeles, CA. Call before your visit to confirm the address.
- What is Leo E. Orr's specialty?
- Medicare lists Hematology/Oncology as the primary specialty.
- Does Leo E. Orr accept Medicare assignment?
- Yes. Medicare's clinician data says Leo E. Orr 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 Leo E. Orr offer telehealth?
- Medicare's clinician data says Leo E. Orr offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Leo E. Orr?
- (323) 278-4400, as listed in official Medicare / NPI Registry data.
- What is Leo E. Orr's NPI number?
- 1730102286. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Leo E. Orr works
Medicare's Facility Affiliation Data lists Leo E. Orr at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Adventist Health White MemorialLos Angeles, CA · Acute Care Hospital · CCN 050103
- California Hospital Medical Center LALos Angeles, CA · Acute Care Hospital · CCN 050149
- Marian Regional Medical CenterSanta Maria, CA · Acute Care Hospital · CCN 050107
- PIH Health Good Samaritan HospitalLos Angeles, CA · Acute Care Hospital · CCN 050471
Practice locations
Addresses where Leo E. Orr is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 101 E Beverly Blvd, Suite 200Montebello, CA 90640 (323) 278‑4400
- 11100 Warner Ave, Suite 214Fountain Valley, CA 92708 (714) 594‑7820
- 1127 Wilshire Blvd, Suite 900Los Angeles, CA 90017 (213) 481‑3948
- 1513 S Grand Ave, Suite 360Los Angeles, CA 90015 (213) 246‑2422
- 21605 Hawthorne Blvd, Suite 200Torrance, CA 90503 (310) 935‑4525
Group practices
Medicare enrollment lists Leo E. Orr 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 California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Baylor College Of Medicine |
| Graduation year | 1969 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1730102286 |
| 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