Quick answers
- Which hospitals does Gerald Nazareno work at?
- Medicare's official clinician data lists Gerald Nazareno at 1 hospital: Stanford Health Care Tri-Valley. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gerald Nazareno see patients?
- Medicare's clinician data lists 2 practice locations, including Livermore, CA and Pleasanton, CA. Call before your visit to confirm the address.
- What is Gerald Nazareno's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Gerald Nazareno accept Medicare assignment?
- Yes. Medicare's clinician data says Gerald Nazareno 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 Gerald Nazareno?
- (925) 373-4500, as listed in official Medicare / NPI Registry data.
- What is Gerald Nazareno's NPI number?
- 1679564983. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gerald Nazareno works
Medicare's Facility Affiliation Data lists Gerald Nazareno at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Stanford Health Care Tri-ValleyPleasanton, CA · Acute Care Hospital · CCN 050283
Practice locations
Addresses where Gerald Nazareno is enrolled with Medicare (CMS data updated 2026-10-02).
- 1133 E Stanley BlvdLivermore, CA 94550 (925) 373‑4500
- 5555 W Las Positas BlvdPleasanton, CA 94588 (925) 416‑3418
Group practices
Medicare enrollment lists Gerald Nazareno as a member of this group (CMS data updated 2026-10-02).
- Pleasanton Emergency Medical Group38 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Livermore
Clinicians with the same Medicare primary specialty in Livermore, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1987 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1679564983 |
| 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