Susan M. O'Brien, MD
	Specialties Hematology-Oncology Internal Medicine Medical School University of Medicine and Dentistry of New Jersey, M.D. Internship University of Medicine & Dentistry of New Jersey Fellowship The University of Texas MD Anderson Cancer Center	Locations UCI Health Chao Family Comprehensive Cancer Center 101 The City Drive South, Building 23 Orange, CA 92868 Fax: 855-211-3729

	Timothy J. O'Brien, PhD
	Specialties Clinical Neuropsychology Internship VA Puget Sound Health Care System - American Lake Div. Fellowship VA Long Beach Healthcare System	Locations Joe C. Wen & Family Center for Advanced Care 19200 Jamboree Road Irvine, CA 92612 UCI Health ALS & Neuromuscular Center 200 S. Manchester Ave., Suite 110 Orange, CA 92868 Fax: 714-456-5997 UCI Health Neurology Services UCI Medical Center, Pavilion 1 101 The City Drive South, Building 30 Orange, CA 92868 Fax: 855-209-8413

	Ryan J. O'Connell, MD
	Specialties Anatomic Pathology Medical School Keck - USC School of Medicine, M.D. Internship University of Southern California/LAC + USC Medical Center	Locations UCI Medical Center 101 The City Drive South Orange, CA 92868

	Chelsea C. O'Haire, PsyD
	Specialties Clinical Psychology Internship Providence Saint John's Child & Family Development Center Fellowship Children's Hospital of Los Angeles	Locations Center for Autism & Neurodevelopmental Disorders Joe C. Wen & Family Center for Advanced Care 19200 Jamboree Road Irvine, CA 92612 Fax: 949-221-0004

	Michael P. O'Leary, MD
	Specialties Surgical Oncology Medical School UC Irvine School of Medicine, M.D. Internship Harbor-UCLA Medical Center Fellowship City of Hope	Locations UCI Health Chao Family Comprehensive Cancer Center 101 The City Drive South, Building 23 Orange, CA 92868 Fax: 855-211-3729

	James G. O'Loughlin, DO
	Specialties Trauma Surgery Surgery Medical School Rocky Vista University College of Osteopathic Medicine, M.D. Internship University of Utah Health Sciences/Medical Center	Locations UCI Medical Center 101 The City Drive South Orange, CA 92868

	Michael D. O'Reilly, PA
	Specialties Physician Assistant	Locations

	Mina Oak, PhD
	Specialties Clinical Psychology	Locations UCI Health SeniorHealth Center 101 The City Drive South, Pavilion 4 Building 25 Orange, CA 92868

	Bryan Oh, MD
	Specialties Neurological Surgery Medical School Stanford University School of Medicine, Medical School Internship University of Southern California Los Angeles County Medical Center	Locations UCI Health — Lakewood Outpatient Center 3650 E. South St. Suite 404 Lakewood, CA 90712 Fax: 562-232-3204

	Michael Y. Oh, MD
	Specialties Neurological Surgery Medical School Keck USC School of Medicine, M.D. New York Medical College, M.D. Internship Allegheny General Hospital Internship Allegheny General Hospital Fellowship Toronto Western Hospital-University Health Network	Locations Joe C. Wen & Family Center for Advanced Care 19200 Jamboree Road Irvine, CA 92612 UCI Health Neurosurgery Services 101 The City Drive South, Pavilion 1 Building 30 Orange, CA 92868 Fax: 855-209-8413 UCI Health — Yorba Linda 18637 Yorba Linda Blvd. Yorba Linda, CA 92886 Fax: 714-779-8003

	Sepehr Oliaei, MD
	Specialties Otolaryngology-Head and Neck Surgery Medical School Tulane University, M.D. Internship University of california Irvine	Locations UCI Health Ear, Nose & Throat Services 101 The City Drive South, Pavilion 2 Building 30A Orange, CA 92868 Fax: 855-854-5414 Joe C. Wen & Family Center for Advanced Care 19200 Jamboree Road Irvine, CA 92612 UCI Health — Placentia 1041 E. Yorba Linda Blvd., Suite 309 Placentia, CA 92870 Fax: 714-577-0050

	Leticia C. Oliveros, MD
	Specialties General Pediatrics Medical School University of Iowa, M.D. Internship University of California, Irvine Internship University of California, Irvine	Locations UCI Health Family Health Center — Anaheim 2441 W. La Palma Ave., Suite 100 Anaheim, CA 92801 Fax: 714-535-5407

	Yasaman Omidvar, MD
	Specialties Family Medicine Medical School University of California Irvine School of Medicine, M.D. Internship University of California Los Angeles Internship University of California Los Angeles	Locations

	Megan B. Osborn, MD
	Specialties Emergency Medicine Medical School Stanford University, M.D. University of California, Irvine, M.D. Internship University of California, Irvine Medical Center	Locations UC Irvine Medical Center 101 The City Drive South Orange, CA 92868

	Daniel J. Otterson, MD
	Specialties Internal Medicine General Pediatrics Medical School Georgetown University School of Medicine, M.D. Internship Medical College of Wisconsin	Locations Joe C. Wen & Family Center for Advanced Care 19200 Jamboree Road Irvine, CA 92612

	Sai-Hong I. Ou, MD
	Specialties Hematology-Oncology Medical Oncology Medical School University of Texas Southwestern Medical School, M.D. Internship Duke University School of Medicine Internship Duke University School of Medicine Fellowship Beth Israel Deaconess Hospital	Locations UCI Health Chao Family Comprehensive Cancer Center 101 The City Drive South, Building 23 Orange, CA 92868 Fax: 855-211-3729