Quick answers
- Which hospitals does William Chen work at?
- Medicare's official clinician data lists William Chen at 5 hospitals: Alta Bates Summit Medical Center, Alta Bates Summit Medical Center - Alta Bates Camp…, Contra Costa Regional Medical Center, John Muir Medical Center - Walnut Creek Campus and Stanford Health Care. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William Chen see patients?
- Medicare's clinician data lists 1 practice location in San Pablo, CA. Call before your visit to confirm the address.
- What is William Chen's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does William Chen accept Medicare assignment?
- Medicare's clinician data says William Chen may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- Does William Chen offer telehealth?
- Medicare's clinician data says William Chen offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for William Chen?
- (510) 235-9247, as listed in official Medicare / NPI Registry data.
- What is William Chen's NPI number?
- 1851498372. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William Chen works
Medicare's Facility Affiliation Data lists William Chen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Alta Bates Summit Medical CenterOakland, CA · Acute Care Hospital · CCN 050043
- Alta Bates Summit Medical Center - Alta Bates Camp…Berkeley, CA · Acute Care Hospital · CCN 050305
- Contra Costa Regional Medical CenterMartinez, CA · Acute Care Hospital · CCN 050276
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA · Acute Care Hospital · CCN 050180
- Stanford Health CareStanford, CA · Acute Care Hospital · CCN 050441
Practice locations
Addresses where William Chen is enrolled with Medicare (CMS data updated 2026-10-02).
- 2089 Vale Rd, Suite 34San Pablo, CA 94806 (510) 235‑9247
Specialties
- Internal Medicineprimary
Other internal medicine doctors in San Pablo
Clinicians with the same Medicare primary specialty in San Pablo, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Js Weill Medical College, Cornell University |
| Graduation year | 1998 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1851498372 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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