Quick answers
- Where does Stephan Y. Chiu see patients?
- Medicare's clinician data lists 2 practice locations, including San Leandro, CA and Castro Valley, CA. Call before your visit to confirm the address.
- What is Stephan Y. Chiu's specialty?
- Medicare lists Ophthalmology as the primary specialty.
- Does Stephan Y. Chiu accept Medicare assignment?
- Yes. Medicare's clinician data says Stephan Y. Chiu 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 Stephan Y. Chiu?
- (510) 357-3636, as listed in official Medicare / NPI Registry data.
- What is Stephan Y. Chiu's NPI number?
- 1053846956. 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 Stephan Y. Chiu is enrolled with Medicare (CMS data updated 2026-10-02).
- 15051 Hesperian Blvd, ASan Leandro, CA 94578 (510) 357‑3636
- 21675 Redwood RdCastro Valley, CA 94546 (510) 357‑3636
Group practices
Medicare enrollment lists Stephan Y. Chiu as a member of this group (CMS data updated 2026-10-02).
- V. Nicholas Batra M.D. Inc.4 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in San Leandro
Clinicians with the same Medicare primary specialty in San Leandro, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Geffen School Of Medicine |
| Graduation year | 2017 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1053846956 |
| 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