Quick answers
- Which hospitals does Chun J. Chang work at?
- Medicare's official clinician data lists Chun J. Chang at 5 hospitals: AHMC Anaheim Regional Medical Center, Chino Valley Medical Center, Montclair Hospital Medical Center, Pomona Valley Hospital Medical Center and Providence St Mary Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Chun J. Chang see patients?
- Medicare's clinician data lists 6 practice locations, including Anaheim, CA, Victorville, CA and South El Monte, CA. Call before your visit to confirm the address.
- What is Chun J. Chang's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Chun J. Chang accept Medicare assignment?
- Yes. Medicare's clinician data says Chun J. Chang 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 Chun J. Chang?
- (951) 898-0823, as listed in official Medicare / NPI Registry data.
- What is Chun J. Chang's NPI number?
- 1003015462. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Chun J. Chang works
Medicare's Facility Affiliation Data lists Chun J. Chang at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- AHMC Anaheim Regional Medical CenterAnaheim, CA · Acute Care Hospital · CCN 050226
- Chino Valley Medical CenterChino, CA · Acute Care Hospital · CCN 050586
- Montclair Hospital Medical CenterMontclair, CA · Acute Care Hospital · CCN 050758
- Pomona Valley Hospital Medical CenterPomona, CA · Acute Care Hospital · CCN 050231
- Providence St Mary Medical CenterApple Valley, CA · Acute Care Hospital · CCN 050300
Practice locations
Addresses where Chun J. Chang is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 1111 W La Palma AveAnaheim, CA 92801 (951) 898‑0823
- 16850 Bear Valley RdVictorville, CA 92395 (760) 241‑8000
- 1701 Santa Anita AveSouth El Monte, CA 91733 (626) 579‑7777
- 1798 N Garey AvePomona, CA 91767 (909) 865‑9500
- 525 N Garfield AveMonterey Park, CA 91754 (626) 573‑2222
Group practices
Medicare enrollment lists Chun J. Chang as a member of these groups (CMS data updated 2026-10-02).
- Cep America - California1,292 clinicians in the group
- Gem Medical Group Corporation57 clinicians in the group
- Ignite Emergency Physicians a Medical Corporation45 clinicians in the group
- Anaheim Emergency Medical Group21 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Anaheim
Clinicians with the same Medicare primary specialty in Anaheim, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Geffen School Of Medicine |
| Graduation year | 2006 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1003015462 |
| 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