Quick answers
- Where does Chao Sun see patients?
- Medicare's clinician data lists 2 practice locations, including Irvine, CA and Santa Ana, CA. Call before your visit to confirm the address.
- What is Chao Sun's specialty?
- Medicare lists Optometry as the primary specialty.
- Does Chao Sun accept Medicare assignment?
- Medicare's clinician data says Chao Sun may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is Chao Sun's NPI number?
- 1043669062. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Chao Sun is enrolled with Medicare (CMS data updated 2026-10-02).
- 4301 Vale StIrvine, CA 92604
- 520 N Main St, Suite 120Santa Ana, CA 92701
Specialties
- Optometryprimary
Other optometrists in Irvine
Clinicians with the same Medicare primary specialty in Irvine, CA — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Medical school | New England College Of Optometry |
| Graduation year | 2016 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1043669062 |
| 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
- 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