Quick answers
- Which hospitals does Hrak Derderian work at?
- Medicare's official clinician data lists Hrak Derderian at 3 hospitals: Los Robles Hospital & Medical Center, PIH Health Good Samaritan Hospital and UCLA West Valley Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Hrak Derderian see patients?
- Medicare's clinician data lists 2 practice locations, including Los Angeles, CA and Tustin, CA. Call before your visit to confirm the address.
- What is Hrak Derderian's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Hrak Derderian accept Medicare assignment?
- Yes. Medicare's clinician data says Hrak Derderian 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 Hrak Derderian?
- (213) 977-2420, as listed in official Medicare / NPI Registry data.
- What is Hrak Derderian's NPI number?
- 1619034725. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Hrak Derderian works
Medicare's Facility Affiliation Data lists Hrak Derderian at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Los Robles Hospital & Medical CenterThousand Oaks, CA · Acute Care Hospital · CCN 050549
- PIH Health Good Samaritan HospitalLos Angeles, CA · Acute Care Hospital · CCN 050471
- UCLA West Valley Medical CenterWest Hills, CA · Acute Care Hospital · CCN 050481
Practice locations
Addresses where Hrak Derderian is enrolled with Medicare (CMS data updated 2026-10-02).
- 1225 Wilshire BlvdLos Angeles, CA 90017 (213) 977‑2420
- 14662 Newport AveTustin, CA 92780 (714) 619‑7700
Group practices
Medicare enrollment lists Hrak Derderian as a member of this group (CMS data updated 2026-10-02).
- Can Emergency Physicians Medical Group Inc45 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Los Angeles
Clinicians with the same Medicare primary specialty in Los Angeles, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Morehouse School Of Medicine |
| Graduation year | 2004 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1619034725 |
| 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