Quick answers
- Which hospitals does Alex Tsai work at?
- Medicare's official clinician data lists Alex Tsai at 2 hospitals: El Camino Health and San Mateo Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Alex Tsai see patients?
- Medicare's clinician data lists 2 practice locations, including Mountain View, CA and Tulare, CA. Call before your visit to confirm the address.
- What is Alex Tsai's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Alex Tsai accept Medicare assignment?
- Yes. Medicare's clinician data says Alex 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 Alex Tsai?
- (650) 940-7000, as listed in official Medicare / NPI Registry data.
- What is Alex Tsai's NPI number?
- 1114504321. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Alex Tsai works
Medicare's Facility Affiliation Data lists Alex 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
- San Mateo Medical CenterSan Mateo, CA · Acute Care Hospital · CCN 050113
Practice locations
Addresses where Alex Tsai is enrolled with Medicare (CMS data updated 2026-10-02).
- 2500 Grant RdMountain View, CA 94040 (650) 940‑7000
- 869 N Cherry StTulare, CA 93274 (559) 688‑0821
Group practices
Medicare enrollment lists Alex Tsai as a member of this group (CMS data updated 2026-10-02).
- Cep America - California1,292 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Mountain View
Clinicians with the same Medicare primary specialty in Mountain View, CA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Kansas City University Of Med & Biosciences, College Of Osteo Med |
| Graduation year | 2021 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1114504321 |
| 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