Quick answers
- Which hospitals does Elyssa J. Feinberg work at?
- Medicare's official clinician data lists Elyssa J. Feinberg at 2 hospitals: Eden Medical Center and Stanford Health Care Tri-Valley. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Elyssa J. Feinberg see patients?
- Medicare's clinician data lists 3 practice locations, including Castro Valley, CA. Call before your visit to confirm the address.
- What is Elyssa J. Feinberg's specialty?
- Medicare lists General Surgery as the primary specialty.
- Does Elyssa J. Feinberg accept Medicare assignment?
- Yes. Medicare's clinician data says Elyssa J. Feinberg 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 Elyssa J. Feinberg?
- (510) 538-5500, as listed in official Medicare / NPI Registry data.
- What is Elyssa J. Feinberg's NPI number?
- 1265713655. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Elyssa J. Feinberg works
Medicare's Facility Affiliation Data lists Elyssa J. Feinberg at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Eden Medical CenterCastro Valley, CA · Acute Care Hospital · CCN 050488
- Stanford Health Care Tri-ValleyPleasanton, CA · Acute Care Hospital · CCN 050283
Practice locations
Addresses where Elyssa J. Feinberg is enrolled with Medicare (CMS data updated 2026-10-02).
- 19845 Lake Chabot RdCastro Valley, CA 94546 (510) 538‑5500
- 19845 Lake Chabot Rd, Suite 200Castro Valley, CA 94546 (510) 538‑5500
- 20103 Lake Chabot RdCastro Valley, CA 94546 (909) 576‑5850
Specialties
- General Surgeryprimary
Other general surgeons in Castro Valley
Clinicians with the same Medicare primary specialty in Castro Valley, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2007 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1265713655 |
| 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