Quick answers
- Which hospitals does Amber E. Williams work at?
- Medicare's official clinician data lists Amber E. Williams at 1 hospital: San Antonio Regional Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Amber E. Williams see patients?
- Medicare's clinician data lists 2 practice locations, including Eastvale, CA and Fontana, CA. Call before your visit to confirm the address.
- What is Amber E. Williams's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Amber E. Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Amber E. 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 Amber E. Williams?
- (951) 393-3000, as listed in official Medicare / NPI Registry data.
- What is Amber E. Williams's NPI number?
- 1144072711. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Amber E. Williams works
Medicare's Facility Affiliation Data lists Amber E. Williams at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- San Antonio Regional HospitalUpland, CA · Acute Care Hospital · CCN 050099
Practice locations
Addresses where Amber E. Williams is enrolled with Medicare (CMS data updated 2026-10-02).
- 12442 Limonite Ave, Unit 102Eastvale, CA 91752 (951) 393‑3000
- 16465 Sierra Lakes PkwyFontana, CA 92336 (909) 434‑1150
Group practices
Medicare enrollment lists Amber E. Williams as a member of this group (CMS data updated 2026-10-02).
- Mountain View Urgent Care Group Inc32 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Eastvale
Clinicians with the same Medicare primary specialty in Eastvale, CA — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2012 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1144072711 |
| 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