Warren D. Johnston, MD

4.8 out of 5 (192 Ratings)
  • Cardiology
    (Board Certified)
  • Vascular Medicine
St. Joseph Heritage Orange - Cardiology
1140 West La Veta Avenue
Suite 430
Orange, CA 92868
Accepting New Patients

Primary Office

St. Joseph Heritage Orange - Cardiology
1140 West La Veta Avenue
Suite 430
Orange, CA 92868
Get Directions
(714) 543-5555
(714) 836-2427

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


  • Meet The Doctor

    Specialties & Education

    Primary Specialties
    • Cardiology
      (Board Certified)
    • Vascular Medicine
    Education & Training
    • Medical School
      University of Rochester School of Medicine - 1975
    • Residency
      USC LA County Medical Center- CA - 1978
    • Fellowship
      UC Irvine Medical Center - 1980
    Areas of Interest

    Preventive Cardiology
    Women's Health
    Geriatric Cardiology

  • Biography



    Dr. Johnston's primary focus is prevention and treatment of cardiovascular disease, lipid disorders and women's heart disease. He was designated as a 2010 Physician of Excellence by Orange County Medical Association and Orange Coast Magazine, and was the 2008 recipient of the "Spirit of St. Joseph" award at St. Joseph Hospital. A part of the Department of Cardiology at St. Joseph Hospital for 21 years, he is currently the co-director of the Women's Heart Center. He has served as faculty at UCI, and is currently the Chairman of the Department of Cardiology at SJHMG. Dr. Johnston is accepting new general cardiology patients.

    Areas of Expertise
    Medical Director: Women's Heart Center
  • 22-Jul-2019
    Excellent doctor: caring and patient
    *Dr. Johnston is always, professional, friendly and covers all care and concerns.
    Dr Johnston is very professional and thorough with his patients. I have and will continue to recommend him to anyone that asks for a cardiologist referral. You and He are the best that anyone could ask for cardiology care.
    I have been a patient of Dr. Johnston in this office for over 20 years. Over those years I have received nothing but excellent treatment.
    Dr. Johnson is my cardiologist and is always a pleasure to see. He is professional, knowledgeable, respectful, and a gentleman. I feel comfortable and blessed to have him caring for me. Thank you.
    53 Total Comments Page 1 2 3 4 5 6 7 8 9 10 11   Next
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