Quick answers
- Which hospitals does Sergio Arreguin work at?
- Medicare's official clinician data lists Sergio Arreguin at 1 hospital: Mercy General Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Sergio Arreguin see patients?
- Medicare's clinician data lists 2 practice locations, including Emeryville, CA. Call before your visit to confirm the address.
- What is Sergio Arreguin's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Sergio Arreguin accept Medicare assignment?
- Medicare's clinician data says Sergio Arreguin may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is Sergio Arreguin's NPI number?
- 1114500501. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Sergio Arreguin works
Medicare's Facility Affiliation Data lists Sergio Arreguin at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy General HospitalSacramento, CA · Acute Care Hospital · CCN 050017
Practice locations
Addresses where Sergio Arreguin is enrolled with Medicare (CMS data updated 2026-10-02).
- 2100 Powell StEmeryville, CA 94608
- 2100 Powell St, Suite 400Emeryville, CA 94608
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Emeryville
Clinicians with the same Medicare primary specialty in Emeryville, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2023 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1114500501 |
| 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