Quick answers
- Which hospitals does William I. Brenner work at?
- Medicare's official clinician data lists William I. Brenner at 1 hospital: Ronald Reagan UCLA Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William I. Brenner see patients?
- Medicare's clinician data lists 1 practice location in Los Angeles, CA. Call before your visit to confirm the address.
- What is William I. Brenner's specialty?
- Medicare lists Cardiac Surgery as the primary specialty, and also General Surgery and Thoracic Surgery.
- Does William I. Brenner accept Medicare assignment?
- Yes. Medicare's clinician data says William I. Brenner 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 William I. Brenner?
- (310) 825-2631, as listed in official Medicare / NPI Registry data.
- What is William I. Brenner's NPI number?
- 1760770259. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William I. Brenner works
Medicare's Facility Affiliation Data lists William I. Brenner at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ronald Reagan UCLA Medical CenterLos Angeles, CA · Acute Care Hospital · CCN 050262
Practice locations
Addresses where William I. Brenner is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 Medical Plz, Suite 630Los Angeles, CA 90095 (310) 825‑2631
Group practices
Medicare enrollment lists William I. Brenner as a member of this group (CMS data updated 2026-10-02).
- The Regents of the University of California42 clinicians in the group
Specialties
- Cardiac Surgeryprimary
- General Surgeryalso
- Thoracic Surgeryalso
Other cardiac surgeons in Los Angeles
Clinicians with the same Medicare primary specialty in Los Angeles, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York University School Of Medicine |
| Graduation year | 1969 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1760770259 |
| 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