Quick answers
- Where does Chao Sun see patients?
- Medicare's clinician data lists 3 practice locations, including Milpitas, CA and Pleasanton, CA. Call before your visit to confirm the address.
- What is Chao Sun's specialty?
- Medicare lists General Practice as the primary specialty, and also Preventive Medicine.
- 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 the phone number for Chao Sun?
- (925) 915-9530, as listed in official Medicare / NPI Registry data.
- What is Chao Sun's NPI number?
- 1013118884. 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).
- 145 W Calaveras BlvdMilpitas, CA 95035 (925) 915‑9530
- 5700 Stoneridge Mall RdPleasanton, CA 94588
- 5700 Stoneridge Mall Rd, Suite 100Pleasanton, CA 94588
Specialties
- General Practiceprimary
- Preventive Medicinealso
Other general practitioners in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1983 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1013118884 |
| 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