Cristina Hernandez O'Day, MD

4.6 out of 5 (66 Ratings)
  • Obstetrics and Gynecology
Spanish, English
St. Joseph Heritage Medical Group
1140 West La Veta Avenue
Suite 770
Orange, CA 92868
Accepting New Patients

Primary Office

St. Joseph Heritage Medical Group
1140 West La Veta Avenue
Suite 770
Orange, CA 92868
Get Directions
(714) 835-8715
(714) 835-8683
Mon - Fri: 9 a.m. - 5 p.m.

More Information

Medical Groups & Affiliations
  • St. Joseph Heritage Medical Group
  • St. Joseph Hospital Affiliated Physicians


  • Meet The Doctor

    Specialties & Education

    Primary Specialties
    • Obstetrics and Gynecology
    Education & Training
    • 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

  • Biography



    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

  • 26-Mar-2019
    one referral never came through.most of the time I do receive the referals in a timely manor
    I visited De O'Day for a hormonal issue and she focused on my mental health, outright suggesting may need antidepressants. Her expression showed disinterest in talking to me and didn't seem to have much desire to give me hormones, again stating "it could be something other than hormones" causing my issues. She's not a psychologist, and I don't think it's appropriate for her to make a patient feel like they are a mental case when coming to her with a hormone issue.
    Dr. Christina O'Day is professional, knowledgeable and friendly. She's the best.
    I love Dr O'day!
    *Dr. O'Day made me confident that I chose the right provider for my health care needs, she did a fantastic job with explaining my future health care needs.
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