Sam T Ontiveros, M.D. 760.339.7100 Specialty: Emergency Medicine El Centro Regional Medical Center Location: 1415 Ross Avenue, El Centro, CA 92243 Get Directions Education: Medical Education: Boston University School of Medicine Residency: Univ. of Massachusetts Medical School Education NPI Ratings Education Medical Education: Boston University School of Medicine Residency: Univ. of Massachusetts Medical School Patient Comments