Quick answers
- Which hospitals does Henry Chang work at?
- Medicare's official clinician data lists Henry Chang at 1 hospital: Saint John's Health Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Henry Chang see patients?
- Medicare's clinician data lists 1 practice location in West Covina, CA. Call before your visit to confirm the address.
- What is Henry Chang's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Osteopathic Manipulative Medicine.
- Does Henry Chang accept Medicare assignment?
- Yes. Medicare's clinician data says Henry 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 Henry Chang?
- (626) 581-0486, as listed in official Medicare / NPI Registry data.
- What is Henry Chang's NPI number?
- 1740430289. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Henry Chang works
Medicare's Facility Affiliation Data lists Henry Chang at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Saint John's Health CenterSanta Monica, CA · Acute Care Hospital · CCN 050290
Practice locations
Addresses where Henry Chang is enrolled with Medicare (CMS data updated 2026-10-02).
- 2707 E Valley Blvd, Suite 208West Covina, CA 91792 (626) 581‑0486
Specialties
Other internal medicine doctors in West Covina
Clinicians with the same Medicare primary specialty in West Covina, CA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Western University Of Health Sciences College Of Dental Med |
| Graduation year | 2007 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1740430289 |
| 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