Warren D. Johnston, MD

4.7 out of 5 (180 Ratings)
  • Cardiology
    (Board Certified)
  • Cardiovascular Disease
    (Board Certified)
1140 W. La Veta Ave.
Suite 430
Orange, CA 92868
Accepting New Patients

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
  • 26-Nov-2018
    7. Allow more time wish ins. would.
    Dr. Johnston came in with the test results of the Lexiscan nuclear stress test. Not my full medical file. He didn't remember if I was a new patient or old patient. He had forgotten about why the this test was necessary. He never answered a letter I sent to him regarding the upcharging on the echocardiogram. Terrible service.
    Good. #1, 4. Good.
    very good
    I changed to have all my dr. in the St. Joseph Group. #9. Outstanding.
    17 Total Comments Page 1 2 3 4   Next