Robert A. Casillas Jr., MD

Hospitals where Robert A. Casillas Jr. works

Medicare's Facility Affiliation Data lists Robert A. Casillas Jr. at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• Kaiser Foundation Hospital - West LALos Angeles, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050561

Practice locations

Addresses where Robert A. Casillas Jr. is enrolled with Medicare (CMS data updated October 2, 2026).

• 9310 Sierra AveFontana, CA 92335 (866) 205‑3595

Group practices

Medicare enrollment lists Robert A. Casillas Jr. as a member of this group (CMS data updated October 2, 2026).

• Southern California Permanente Medical Group11,293 clinicians in the group

Specialties

• General Surgeryprimary

Find other General Surgery doctors in California →

Other general surgeons in Fontana

Clinicians with the same Medicare primary specialty in Fontana, CA — not a recommendation.

• Jane W. Xu, MD
• Rene Tellez Jr., MD
• Brian J. Sutjiadi, MD
• Jane Ong, MD
• Stephanie C. Hanna, MD
• Nhan T. Huynh, MD
• Iden D. Andacheh, MD
• Wega Koss, MD

All general surgeons in Fontana →

Other clinicians in Southern California Permanente Medical Group

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Artin Petokian, PT
• Depinder Mann, MD
• Jay P. Mongiardo, MD
• Cynthia L. Freel, MD
• Chileshe N. Price, MD
• Sinh H. Tran, MD

Clinician information

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

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
5. Medicare Care Compare — official Medicare tool to look up clinicians