Quick answers
- Where does William S. Hamra see patients?
- Medicare's clinician data lists 1 practice location in Riverside, CA. Call before your visit to confirm the address.
- What is William S. Hamra's specialty?
- Medicare lists Pediatric Medicine as the primary specialty.
- Does William S. Hamra accept Medicare assignment?
- Yes. Medicare's clinician data says William S. Hamra 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 S. Hamra?
- (951) 697-5556, as listed in official Medicare / NPI Registry data.
- What is William S. Hamra's NPI number?
- 1134445596. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where William S. Hamra is enrolled with Medicare (CMS data updated 2026-10-02).
- 6405 Day StRiverside, CA 92507 (951) 697‑5556
Group practices
Medicare enrollment lists William S. Hamra as a member of this group (CMS data updated 2026-10-02).
- Riverside Medical Clinic Inc173 clinicians in the group
Specialties
- Pediatric Medicineprimary
Other pediatricians in Riverside
Clinicians with the same Medicare primary specialty in Riverside, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loma Linda University School Of Medicine |
| Graduation year | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1134445596 |
| 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
- 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