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Cristina Hernandez O'Day MD
Practice accepting new patients.

Cristina Hernandez O'Day MD

(714) 771-7123
Primary Specialties
  • Obstetrics/Gynecology
Medical Groups & Affiliations
  • St. Joseph Heritage Medical Group
  • St. Joseph Hospital Affiliated Physicians
  • Additional Languages Spoken

Primary Office

1140 W. La Veta Ave., Suite 770
Orange, CA 92868
(714) 771-7123
(714) 771-0249
Mon - Fri
9:00 AM - 5:00 PM
Web Page:
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Physician Bio

Dr. Cristina Hernández O'Day ignites her practice with a fresh perspective and a deep passion for providing quality women's health services. She was delivered, taught and inspired by her father, Dr. Jesús Hernández. Dr. Cristina Hernández O'Day is bilingual with a dual Hispanic and Asian American cultural background.

Dr. Hernandez O'Day graduated Magna Cum Laude for her Bachelor of Science degree in Health Promotion and Disease Prevention from the University of Southern California, with minors in the Natural Sciences and Spanish. As a graduate of the University of California, Irvine Medical School, Dr. Hernández O'Day was elected to the prestigious Alpha Omega Alpha Honor Society for her excellence in scholarship and the highest ideals in the profession including ethical standards, dedication to serving others and leadership. She completed her residency at University of California San Diego with extensive training in minimally invasive surgery which minimizes patients scarring, pain and recovery time.

"I love the obgyn specialty because as a woman myself, I can relate to so many of my patients' concerns and I get to build a relationship and care for a patient throughout her lifetime. Pregnancy is especially rewarding because it is a privilege to be a part of a new little miracle of life."

– Dr. Cristina Hernández O'Day


  • College:
    University of Southern California - 2003
  • Medical School:
    Medical UC Irvine - 2007
  • Internship:
    UC San Diego - 2010
  • Residency:
    UC San Diego - 2011

Areas of Interest

Minimally Invasive Surgery - Robotics Laparoscopy and Hysteroscopy