Warren D. Johnston, MD

4.7 out of 5 (168 Ratings)
  • Cardiology
    (Board Certified)
  • Cardiovascular Disease
    (Board Certified)
1140 W. La Veta Ave.
Suite 430
Orange, CA 92868
Accepting New Patients
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Primary Office

1140 W. La Veta Ave.
Suite 430
Orange, CA 92868
Get Directions
(714) 543-5555
(714) 836-2427

More Information

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


  • Meet The Doctor

    Specialties & Education

    Primary Specialties
    • Cardiology
      (Board Certified)
    • Cardiovascular Disease
      (Board Certified)
    Education & Training
    • Medical School
      University of Rochester School of Medicine, NY - 1975
    • Residency
      USC LA County Medical Center- CA- Los Angeles - 1978
    • Fellowship
      UC Irvine Medical Center- Irvine, CA - 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
  • 3-Oct-2018
    very good
    I changed to have all my dr. in the St. Joseph Group. #9. Outstanding.
    Some visits, I feel like the MD is in a rush to keep on schedule. But does listen to me when I have a problem, and order the needed tests.
    Dr. Johnston was exemplary in his bed side demeanor. Helped me to cycle thru the decisions we needed to make with respect to my Heart disease meds. Really appreciated that. He spent 30 minutes with me. THAT.........was huge!! I realize the demands for his time are substantial.
    This was my 3rd visit to see Dr. Johnston and I have never left him feeling anything but confidence I am with the best.
    18 Total Comments Page 1 2 3 4   Next
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