Quick answers
- Which hospitals does Alexander Gau work at?
- Medicare's official clinician data lists Alexander Gau at 3 hospitals: Palo Verde Hospital, Pomona Valley Hospital Medical Center and Riverside University Health System-Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Alexander Gau see patients?
- Medicare's clinician data lists 2 practice locations, including Pomona, CA and Moreno Valley, CA. Call before your visit to confirm the address.
- What is Alexander Gau's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Alexander Gau accept Medicare assignment?
- Yes. Medicare's clinician data says Alexander Gau 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 Alexander Gau?
- (909) 865-9500, as listed in official Medicare / NPI Registry data.
- What is Alexander Gau's NPI number?
- 1801478540. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Alexander Gau works
Medicare's Facility Affiliation Data lists Alexander Gau at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Palo Verde HospitalBlythe, CA · Critical Access Hospital · CCN 051339
- Pomona Valley Hospital Medical CenterPomona, CA · Acute Care Hospital · CCN 050231
- Riverside University Health System-Medical CenterMoreno Valley, CA · Acute Care Hospital · CCN 050292
Practice locations
Addresses where Alexander Gau is enrolled with Medicare (CMS data updated 2026-10-02).
- 1798 N Garey AvePomona, CA 91767 (909) 865‑9500
- 26520 Cactus AveMoreno Valley, CA 92555 (909) 486‑5650
Group practices
Medicare enrollment lists Alexander Gau 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 Pomona
Clinicians with the same Medicare primary specialty in Pomona, CA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2021 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1801478540 |
| 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