Quick answers
- Where does William Z. Sun see patients?
- Medicare's clinician data lists 2 practice locations, including Philadelphia, PA. Call before your visit to confirm the address.
- What is William Z. Sun's specialty?
- Medicare lists Ophthalmology as the primary specialty.
- Does William Z. Sun accept Medicare assignment?
- Yes. Medicare's clinician data says William Z. Sun 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 William Z. Sun?
- (215) 564-4277, as listed in official Medicare / NPI Registry data.
- What is William Z. Sun's NPI number?
- 1043247943. 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 William Z. Sun is enrolled with Medicare (CMS data updated 2026-10-02).
- 2031 Locust StPhiladelphia, PA 19103
- 2031 Locust St, C 500Philadelphia, PA 19103 (215) 564‑4277
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Philadelphia
Clinicians with the same Medicare primary specialty in Philadelphia, PA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Hahneman Medical College Of The Pacific |
| Graduation year | 1976 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1043247943 |
| 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