Quick answers
- Where does Bill W. Chan see patients?
- Medicare's clinician data lists 2 practice locations, including San Dimas, CA and Pasadena, CA. Call before your visit to confirm the address.
- What is Bill W. Chan's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Bill W. Chan accept Medicare assignment?
- Medicare's clinician data says Bill W. Chan may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is Bill W. Chan's NPI number?
- 1255073706. 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 Bill W. Chan is enrolled with Medicare (CMS data updated 2026-10-02).
- 180 Via Verde, Suite 100San Dimas, CA 91773
- PO BoxPasadena, CA 91189
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in San Dimas
Clinicians with the same Medicare primary specialty in San Dimas, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | George Washington University School Of Medicine |
| Graduation year | 2022 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1255073706 |
| 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