Quick answers
- Which hospitals does Brendan O. Williams work at?
- Medicare's official clinician data lists Brendan O. Williams at 1 hospital: Riverside Community Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Brendan O. Williams see patients?
- Medicare's clinician data lists 3 practice locations, including Murrieta, CA, Redlands, CA and Los Angeles, CA. Call before your visit to confirm the address.
- What is Brendan O. Williams's specialty?
- Medicare lists Certified Registered Nurse Anesthetist (CRNA) as the primary specialty.
- Does Brendan O. Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Brendan O. Williams 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 Brendan O. Williams?
- (951) 290-4000, as listed in official Medicare / NPI Registry data.
- What is Brendan O. Williams's NPI number?
- 1043058910. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Brendan O. Williams works
Medicare's Facility Affiliation Data lists Brendan O. Williams at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Riverside Community HospitalRiverside, CA · Acute Care Hospital · CCN 050022
Practice locations
Addresses where Brendan O. Williams is enrolled with Medicare (CMS data updated 2026-10-02).
- 28062 Baxter RdMurrieta, CA 92563 (951) 290‑4000
- 350 Terracina BlvdRedlands, CA 92373 (909) 335‑5593
- 8741 Alden Dr, Suite CLos Angeles, CA 90048 (323) 693‑8832
Group practices
Medicare enrollment lists Brendan O. Williams as a member of these groups (CMS data updated 2026-10-02).
- Darin Rentz DO PC124 clinicians in the group
- Sound Physicians Anesthesiology of California PC35 clinicians in the group
- Vasa Anesthesia Professional Corporation22 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), California →
Other nurse anesthetists in Murrieta
Clinicians with the same Medicare primary specialty in Murrieta, CA — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Graduation year | 2024 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1043058910 |
| 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