Quick answers
- Which hospitals does Diana Tsai work at?
- Medicare's official clinician data lists Diana Tsai at 2 hospitals: El Camino Health and Good Samaritan Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Diana Tsai see patients?
- Medicare's clinician data lists 5 practice locations, including San Jose, CA, Mountain View, CA and Los Altos, CA. Call before your visit to confirm the address.
- What is Diana Tsai's specialty?
- Medicare lists Hospitalist as the primary specialty.
- Does Diana Tsai accept Medicare assignment?
- Yes. Medicare's clinician data says Diana Tsai 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 Diana Tsai?
- (408) 559-2011, as listed in official Medicare / NPI Registry data.
- What is Diana Tsai's NPI number?
- 1669534467. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Diana Tsai works
Medicare's Facility Affiliation Data lists Diana Tsai at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- El Camino HealthMountain View, CA · Acute Care Hospital · CCN 050308
- Good Samaritan HospitalSan Jose, CA · Acute Care Hospital · CCN 050380
Practice locations
Addresses where Diana Tsai is enrolled with Medicare (CMS data updated 2026-10-02).
- 2425 Samaritan DrSan Jose, CA 95124 (408) 559‑2011
- 2500 Grant RdMountain View, CA 94040 (650) 940‑7000
- 370 Distel CirLos Altos, CA 94022 (650) 254‑5200
- 795 El Camino RealPalo Alto, CA 94301 (415) 600‑1020
- 815 Pollard RdLos Gatos, CA 95032 (408) 378‑6131
Group practices
Medicare enrollment lists Diana Tsai as a member of this group (CMS data updated 2026-10-02).
- Sutter Bay Medical Foundation3,829 clinicians in the group
Specialties
- Hospitalistprimary
Other hospitalists in San Jose
Clinicians with the same Medicare primary specialty in San Jose, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Saint Louis University School Of Medicine |
| Graduation year | 1999 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1669534467 |
| 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