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License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. Warren Johnston:

View the full profile to get information on:

  1. Qualifications
  2. What's important to you

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Patient Reviews

4.5
  •  
(4)
Patient comments (1)

The overall average patient rating of Dr. Warren Johnston is Excellent. Dr. Johnston has been reviewed by 4 patients who have provided 1 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.5
  •  
Promptness 5.0
  •  
Courteous Staff 5.0
  •  
Accurate Diagnosis 4.3
  •  
Bedside Manner 4.3
  •  
Spends Time with Me 4.1
  •  
Follows Up After Visit 5.0
  •  

Specialties & Research

Dr. Warren Johnston, FACC, FACP, MD is board certified in Internal Medicine and Cardiovascular Disease.

  • He has special expertise in 6 areas:
  • Acute Coronary Syndrome (ACS)
  • Heart Block
  • High Blood Pressure (Hypertension)
  • High Cholesterol (Hypercholesterolemia)
  • Unstable Angina
  • Women's Health

Education & Awards

Dr. Johnston graduated from University of Rochester .


Affiliations

Dr. Johnston has 8 hospital affiliations:

  • St. Joseph Hospital - Orange 
  • Irvine Regional Hospital & Medical Center 

Languages

  • Spanish
  • Farsi
  • Persian
  • Armenian

> > > > Dr. Warren Johnston, FACC, FACP, MD

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Additional Information
Dr. Warren David Johnston FACC, FACP, and MD is a male Internist, has 36 years of experience and practices in Internal Medicine and Cardiovascular Disease.
Where does Dr. Warren D. Johnston practice?
Dr. Warren Johnston has 1 office location.
Dr. Warren Johnston practices Internal Medicine and Cardiovascular Disease near Orange, CA.
See Orange Internists and Orange Cardiologists.