Quick answers
- Which hospitals does Ernest B. Chang work at?
- Medicare's official clinician data lists Ernest B. Chang at 1 hospital: University of California Davis Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ernest B. Chang see patients?
- Medicare's clinician data lists 2 practice locations, including Sacramento, CA. Call before your visit to confirm the address.
- What is Ernest B. Chang's specialty?
- Medicare lists Optometry as the primary specialty.
- Does Ernest B. Chang accept Medicare assignment?
- Yes. Medicare's clinician data says Ernest B. 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 Ernest B. Chang?
- (916) 734-6602, as listed in official Medicare / NPI Registry data.
- What is Ernest B. Chang's NPI number?
- 1235786898. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ernest B. Chang works
Medicare's Facility Affiliation Data lists Ernest B. Chang at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- University of California Davis Medical CenterSacramento, CA · Acute Care Hospital · CCN 050599
Practice locations
Addresses where Ernest B. Chang is enrolled with Medicare (CMS data updated 2026-10-02).
- 4860 Y St, Suite 2400Sacramento, CA 95817 (916) 734‑6602
- 77 Cadillac Dr, Suite 240Sacramento, CA 95825 (916) 734‑6111
Group practices
Medicare enrollment lists Ernest B. Chang as a member of this group (CMS data updated 2026-10-02).
- Regents of the University of California567 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Sacramento
Clinicians with the same Medicare primary specialty in Sacramento, CA — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Medical school | Pacific University - College Of Optometry |
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1235786898 |
| 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