Quick answers
- Which hospitals does Yas A. Casey work at?
- Medicare's official clinician data lists Yas A. Casey at 3 hospitals: Kaiser Foundation Hospital Fontana/Ontario, Redlands Community Hospital and Riverside Community Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Yas A. Casey see patients?
- Medicare's clinician data lists 5 practice locations, including Redlands, CA, Riverside, CA and Banning, CA. Call before your visit to confirm the address.
- What is Yas A. Casey's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Yas A. Casey accept Medicare assignment?
- Yes. Medicare's clinician data says Yas A. Casey 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 Yas A. Casey?
- (909) 335-5593, as listed in official Medicare / NPI Registry data.
- What is Yas A. Casey's NPI number?
- 1336568971. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Yas A. Casey works
Medicare's Facility Affiliation Data lists Yas A. Casey at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Kaiser Foundation Hospital Fontana/OntarioFontana, CA · Acute Care Hospital · CCN 050140
- Redlands Community HospitalRedlands, CA · Acute Care Hospital · CCN 050272
- Riverside Community HospitalRiverside, CA · Acute Care Hospital · CCN 050022
Practice locations
Addresses where Yas A. Casey is enrolled with Medicare (CMS data updated 2026-10-02).
- 350 Terracina BlvdRedlands, CA 92373 (909) 335‑5593
- 4354 Latham St, Suite 100Riverside, CA 92501 (951) 466‑6628
- 4500 Brockton Ave, Suite 305Riverside, CA 92501 (951) 877‑5874
- 600 N Highland Springs AveBanning, CA 92220 (951) 845‑1121
- 6900 Brockton Ave, Suite 200Riverside, CA 92506 (951) 682‑6263
Group practices
Medicare enrollment lists Yas A. Casey as a member of these groups (CMS data updated 2026-10-02).
- Darin Rentz DO PC124 clinicians in the group
- Alertive Healthcare Medical Group Apc39 clinicians in the group
- Grace Medical and Wellness Clinic6 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Redlands
Clinicians with the same Medicare primary specialty in Redlands, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2009 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1336568971 |
| 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