Dr. Warren Johnston, MD is accepting new patients on Healthline FindCare. You can check to see if Dr. Johnston is offering online scheduling or call the provider’s office for more information.
- FindCare
- Cardiologists
- CA
- Orange
- Dr. Warren Johnston, MD
Link Copied!
Profile link copied to clipboard!
Dr. Warren Johnston, MD
Overview of Dr. Warren Johnston, MD
Dr. Warren Johnston, MD is a Cardiology Specialist in Orange, CA. They specialize in Cardiology, has 49 years of experience, and is board certified in Cardiovascular Disease. They graduated from University of Rochester and is affiliated with Providence St. Joseph Hospital Orange. Patients rated Dr. Johnston an average 3.4 star rating.
Dr. Johnston works at
Find providers based on your care needs
User Ratings (of at least 4.0)
Insurance Accepted
Headshot Available
Accepting New Patients
Conditions Treated and Procedures Performed
Start the search for a new doctor with Super Profiles and customizable filters that matter the most to you.
Dr. Johnston's Office Locations
-
1
St. Joseph Heritage Orange - Cardiology1140 W La Veta Ave Ste 430, Orange, CA 92868 Directions (714) 543-5555
Hospital Affiliations
Admitting Hospitals
Admitting hospitals are where the provider is credentialed to see patients, perform procedures, and send patients for continuous care.
Admitting Hospitals
Admitting hospitals are where the provider is credentialed to see patients, perform procedures, and send patients for continuous care.
Admitting hospitals are where the provider is credentialed to see patients, perform procedures, and send patients for continuous care.
- Providence St. Joseph Hospital Orange
Experience & Treatment Frequency
NEW FEATURE
What is treatment frequency?
Our treatment frequency feature helps you understand howoften a provider performs or treats a specificprocedure/condition compared to other doctors. Providersrank in one of four frequency categories:
Very HighFrequency HighFrequency NormalFrequency May Perform Specific procedures/conditions that don’t haveenough data are indicated with “May Perform”. We encourageyou to contact the provider with questions about theirexperience.
NEW FEATURE
What is treatment frequency?
Our treatment frequency feature helps you understand howoften a provider performs or treats a specificprocedure/condition compared to other doctors. Providersrank in one of four frequency categories:
Very HighFrequency
HighFrequency
NormalFrequency
May Perform
Specific procedures/conditions that don’t haveenough data are indicated with “May Perform”. We encourageyou to contact the provider with questions about theirexperience.
Search for conditions or procedures.
Condition or procedure
Treatment Frequency
Supraventricular Tachycardia
Atherosclerosis of Aorta
First Degree Heart Block
Abdominal Aortic Aneurysm (AAA)
Acute Coronary Syndrome
Acute Deep Vein Thrombosis (DVT)
Acute Venous Embolism Thrombosis
Aneurysm
Aneurysm of Heart
Angina
Aortic Aneurysm
Aortic Dissection
Aortic Ectasia
Aortic Stenosis
Aortic Valve Disease
Aortic Valve Regurgitation
Arrhythmias
Atherosclerosis
Atrial Fibrillation
Atrial Flutter
Atrial Septal Defect
Benign Heart Tumors
Cardiomegaly
Cardiomyopathy
Cardiomyopathy, Dilated
Cardiomyopathy, Hypertrophic
Carotid Artery Disease
Chest Pain
Chronic Pulmonary Heart Diseases (incl. Pulmonary Hypertension)
Coarctation of the Aorta
Congenital Aortic Valve Disorders
Congenital Heart Defects
Congenital Heart Disease
Congestive Heart Failure
Coronary Artery Disease (CAD)
Deep Vein Thrombosis (DVT)
Endocarditis
Heart Attack (Acute Myocardial Infarction)
Heart Disease
Heart Murmur
Heart Palpitations
Hyperlipidemia
Hypertension
Hypertensive Chronic Kidney Disease
Hypertensive Heart and Chronic Kidney Disease
Hypertensive Heart Disease
Hypertensive Heart without Failure
Hypotension
Hypotension (Excluding Maternal)
Limb Swelling Caused by Fluid Overload
Lipid Disorders
Mitral Valve Disease
Mitral Valve Prolapse
Mitral Valve Regurgitation
Mitral Valve Stenosis
Noninfective Endocarditis
Nonrheumatic Tricuspid Disease
Paroxysmal Atrial Fibrillation
Patent Ductus Arteriosus
Patent Foramen Ovale (PFO)
Pericardial Disease
Pericarditis
Peripheral Edema
Peripheral Vascular Disease (PAD, PVD)
Primary Pulmonary Hypertension
Pulmonary Hypertension
Pulmonary Valve Disease
Rheumatic Aortic Valve Disorders
Rheumatic Tricuspid Disease
Second Degree Heart Block
Secondary Renovascular Hypertension
Septal Defect
Sick Sinus Syndrome
Sinus Bradycardia
Sinus Tachycardia
Syncope
Systemic Vasculitis
Systolic Heart Failure
Third Degree Heart Block
Thoracoabdominal Aortic Aneurysm
Tricuspid Valve Disease
Type 2 Heart Block - Mobitz
Venous Hypertension
Ventricular Tachycardia (VT)
Wolff-Parkinson-White Pattern
Arrhythmia Screening
Cardiac Catheterization (incl. Coronary Angiography)
Cardiac Imaging
Cardiac MRI (Magnetic Resonance Imaging) of Heart or Chest
Cardiac Myocardial Perfusion Imaging
Cardiac Ultrasound
Cardiovascular Diagnostic Test
Cardiovascular Stress Test
Cardioversion, Elective
Chest CT (incl. Heart and Lungs)
Chest Pain Evaluation
Cholesterol Screening
Coronary Angiogram
Coronary Angioplasty, Atherectomy and Stent
Dobutamine Thallium Stress Test
Electrocardiogram (EKG)
HeartAware Online Risk Screening
Nuclear Stress Testing
Peripheral Arterial Disease Screening (PAD)
Pharmacologic Nuclear Stress Test
Pharmacologic Stress Test, Adenosine
Stress Test
Structural Heart Disease Evaluations and Treatment
TCD Bubble Test
Thoracentesis
Tilt Table Testing
Tilt_Testing
Treadmill Stress Test
Vascular Duplex Ultrasonography and Plethysmography
Supraventricular Tachycardia
Atherosclerosis of Aorta
First Degree Heart Block
Supraventricular Tachycardia
Atherosclerosis of Aorta
First Degree Heart Block
Treatment frequency
Many providers have expertise treating multiple conditions or procedures. FindCare uses a variety of data sources to determine which conditions or procedures a provider treats and their level of experience.
Supraventricular Tachycardia
- View other providers who treat Supraventricular Tachycardia
Atherosclerosis of Aorta
- View other providers who treat Atherosclerosis of Aorta
First Degree Heart Block
- View other providers who treat First Degree Heart Block
Aortic Valve Disease
- View other providers who treat Aortic Valve Disease
Cardiomegaly
- View other providers who treat Cardiomegaly
Mitral Valve Prolapse
- View other providers who treat Mitral Valve Prolapse
Sinus Bradycardia
- View other providers who treat Sinus Bradycardia
Abdominal Aortic Aneurysm (AAA)
- View other providers who treat Abdominal Aortic Aneurysm (AAA)
Acute Deep Vein Thrombosis (DVT)
- View other providers who treat Acute Deep Vein Thrombosis (DVT)
Acute Venous Embolism Thrombosis
- View other providers who treat Acute Venous Embolism Thrombosis
Aortic Aneurysm
- View other providers who treat Aortic Aneurysm
Aortic Ectasia
- View other providers who treat Aortic Ectasia
Aortic Valve Regurgitation
- View other providers who treat Aortic Valve Regurgitation
Arrhythmias
- View other providers who treat Arrhythmias
Atherosclerosis
- View other providers who treat Atherosclerosis
Atrial Fibrillation
- View other providers who treat Atrial Fibrillation
Atrial Flutter
- View other providers who treat Atrial Flutter
Cardiomyopathy
- View other providers who treat Cardiomyopathy
Carotid Artery Disease
- View other providers who treat Carotid Artery Disease
Chest Pain
- View other providers who treat Chest Pain
Congestive Heart Failure
- View other providers who treat Congestive Heart Failure
Coronary Artery Disease (CAD)
- View other providers who treat Coronary Artery Disease (CAD)
Deep Vein Thrombosis (DVT)
- View other providers who treat Deep Vein Thrombosis (DVT)
Endocarditis
- View other providers who treat Endocarditis
Heart Disease
- View other providers who treat Heart Disease
Heart Murmur
- View other providers who treat Heart Murmur
Heart Palpitations
- View other providers who treat Heart Palpitations
Hyperlipidemia
- View other providers who treat Hyperlipidemia
Hypertension
- View other providers who treat Hypertension
Hypertensive Chronic Kidney Disease
- View other providers who treat Hypertensive Chronic Kidney Disease
Hypertensive Heart and Chronic Kidney Disease
- View other providers who treat Hypertensive Heart and Chronic Kidney Disease
Hypertensive Heart Disease
- View other providers who treat Hypertensive Heart Disease
Hypertensive Heart without Failure
- View other providers who treat Hypertensive Heart without Failure
Lipid Disorders
- View other providers who treat Lipid Disorders
Mitral Valve Disease
- View other providers who treat Mitral Valve Disease
Mitral Valve Regurgitation
- View other providers who treat Mitral Valve Regurgitation
Noninfective Endocarditis
- View other providers who treat Noninfective Endocarditis
Nonrheumatic Tricuspid Disease
- View other providers who treat Nonrheumatic Tricuspid Disease
Paroxysmal Atrial Fibrillation
- View other providers who treat Paroxysmal Atrial Fibrillation
Pericardial Disease
- View other providers who treat Pericardial Disease
Peripheral Edema
- View other providers who treat Peripheral Edema
Peripheral Vascular Disease (PAD, PVD)
- View other providers who treat Peripheral Vascular Disease (PAD, PVD)
Pulmonary Valve Disease
- View other providers who treat Pulmonary Valve Disease
Rheumatic Tricuspid Disease
- View other providers who treat Rheumatic Tricuspid Disease
Second Degree Heart Block
- View other providers who treat Second Degree Heart Block
Secondary Renovascular Hypertension
- View other providers who treat Secondary Renovascular Hypertension
Syncope
- View other providers who treat Syncope
Thoracoabdominal Aortic Aneurysm
- View other providers who treat Thoracoabdominal Aortic Aneurysm
Tricuspid Valve Disease
- View other providers who treat Tricuspid Valve Disease
Type 2 Heart Block - Mobitz
- View other providers who treat Type 2 Heart Block - Mobitz
Ventricular Tachycardia (VT)
- View other providers who treat Ventricular Tachycardia (VT)
Cardiac Myocardial Perfusion Imaging
- View other providers who treat Cardiac Myocardial Perfusion Imaging
Cardiac Ultrasound
- View other providers who treat Cardiac Ultrasound
Chest CT (incl. Heart and Lungs)
- View other providers who treat Chest CT (incl. Heart and Lungs)
Electrocardiogram (EKG)
- View other providers who treat Electrocardiogram (EKG)
Tilt_Testing
- View other providers who treat Tilt_Testing
Vascular Duplex Ultrasonography and Plethysmography
- View other providers who treat Vascular Duplex Ultrasonography and Plethysmography
Acute Coronary Syndrome
- View other providers who treat Acute Coronary Syndrome
Aneurysm
- View other providers who treat Aneurysm
Aneurysm of Heart
- View other providers who treat Aneurysm of Heart
Angina
- View other providers who treat Angina
Aortic Dissection
- View other providers who treat Aortic Dissection
Aortic Stenosis
- View other providers who treat Aortic Stenosis
Atrial Septal Defect
- View other providers who treat Atrial Septal Defect
Benign Heart Tumors
- View other providers who treat Benign Heart Tumors
Cardiomyopathy, Dilated
- View other providers who treat Cardiomyopathy, Dilated
Cardiomyopathy, Hypertrophic
- View other providers who treat Cardiomyopathy, Hypertrophic
Chronic Pulmonary Heart Diseases (incl. Pulmonary Hypertension)
- View other providers who treat Chronic Pulmonary Heart Diseases (incl. Pulmonary Hypertension)
Coarctation of the Aorta
- View other providers who treat Coarctation of the Aorta
Congenital Aortic Valve Disorders
- View other providers who treat Congenital Aortic Valve Disorders
Congenital Heart Defects
- View other providers who treat Congenital Heart Defects
Congenital Heart Disease
- View other providers who treat Congenital Heart Disease
Heart Attack (Acute Myocardial Infarction)
- View other providers who treat Heart Attack (Acute Myocardial Infarction)
Hypotension
- View other providers who treat Hypotension
Hypotension (Excluding Maternal)
- View other providers who treat Hypotension (Excluding Maternal)
Limb Swelling Caused by Fluid Overload
- View other providers who treat Limb Swelling Caused by Fluid Overload
Mitral Valve Stenosis
- View other providers who treat Mitral Valve Stenosis
Patent Ductus Arteriosus
- View other providers who treat Patent Ductus Arteriosus
Patent Foramen Ovale (PFO)
- View other providers who treat Patent Foramen Ovale (PFO)
Pericarditis
- View other providers who treat Pericarditis
Primary Pulmonary Hypertension
- View other providers who treat Primary Pulmonary Hypertension
Pulmonary Hypertension
- View other providers who treat Pulmonary Hypertension
Rheumatic Aortic Valve Disorders
- View other providers who treat Rheumatic Aortic Valve Disorders
Septal Defect
- View other providers who treat Septal Defect
Sick Sinus Syndrome
- View other providers who treat Sick Sinus Syndrome
Sinus Tachycardia
- View other providers who treat Sinus Tachycardia
Systemic Vasculitis
- View other providers who treat Systemic Vasculitis
Systolic Heart Failure
- View other providers who treat Systolic Heart Failure
Third Degree Heart Block
- View other providers who treat Third Degree Heart Block
Venous Hypertension
- View other providers who treat Venous Hypertension
Wolff-Parkinson-White Pattern
- View other providers who treat Wolff-Parkinson-White Pattern
Arrhythmia Screening
- View other providers who treat Arrhythmia Screening
Cardiac Catheterization (incl. Coronary Angiography)
- View other providers who treat Cardiac Catheterization (incl. Coronary Angiography)
Cardiac Imaging
- View other providers who treat Cardiac Imaging
Cardiac MRI (Magnetic Resonance Imaging) of Heart or Chest
- View other providers who treat Cardiac MRI (Magnetic Resonance Imaging) of Heart or Chest
Cardiovascular Diagnostic Test
- View other providers who treat Cardiovascular Diagnostic Test
Cardiovascular Stress Test
- View other providers who treat Cardiovascular Stress Test
Cardioversion, Elective
- View other providers who treat Cardioversion, Elective
Chest Pain Evaluation
- View other providers who treat Chest Pain Evaluation
Cholesterol Screening
- View other providers who treat Cholesterol Screening
Coronary Angiogram
- View other providers who treat Coronary Angiogram
Coronary Angioplasty, Atherectomy and Stent
- View other providers who treat Coronary Angioplasty, Atherectomy and Stent
Dobutamine Thallium Stress Test
- View other providers who treat Dobutamine Thallium Stress Test
HeartAware Online Risk Screening
- View other providers who treat HeartAware Online Risk Screening
Nuclear Stress Testing
- View other providers who treat Nuclear Stress Testing
Peripheral Arterial Disease Screening (PAD)
- View other providers who treat Peripheral Arterial Disease Screening (PAD)
Pharmacologic Nuclear Stress Test
- View other providers who treat Pharmacologic Nuclear Stress Test
Pharmacologic Stress Test, Adenosine
- View other providers who treat Pharmacologic Stress Test, Adenosine
Stress Test
- View other providers who treat Stress Test
Structural Heart Disease Evaluations and Treatment
- View other providers who treat Structural Heart Disease Evaluations and Treatment
TCD Bubble Test
- View other providers who treat TCD Bubble Test
Thoracentesis
- View other providers who treat Thoracentesis
Tilt Table Testing
- View other providers who treat Tilt Table Testing
Treadmill Stress Test
- View other providers who treat Treadmill Stress Test
Check your insurance
Please double-check when making an appointment.
View All Accepted Carriers
- ADVANTAGE Health Solutions, Inc.
- Aetna
- Anthem Blue Cross
- Blue Cross Blue Shield
- Blue Cross Blue Shield of California
- Blue Shield of California
- Cigna
- Clover Health
- First Health
- Health Net
- Humana
- Oscar Health
- UnitedHealthCare
* Please verify this information when scheduling an appointment.
Ratings & Reviews
Reviews are displayed in date order and collected from patients who have agreed to reporting accurate and fair reviews. Providers with no reviews may have a new FindCare profile, or no submitted reviews on FindCare yet.
Learn more about how FindCare's ratings and reviews work
Reviews are displayed in date order and collected from patients who have agreed to reporting accurate and fair reviews. Providers with no reviews may have a new FindCare profile, or no submitted reviews on FindCare yet.
Learn more about how FindCare's ratings and reviews work
Learn more about how FindCare's ratings and reviews work
3.4
Average provider rating
Based on 13 ratings
Patient Ratings (13)
5 Star
(7)
4 Star
(1)
3 Star
(0)
2 Star
(0)
1 Star
(5)
Leave a review
How was your appointment with Dr. Johnston?
Thank you for sharing your feedback about Dr. Warren Johnston, MD.
About Dr. Warren Johnston, MD
Specialties*
- Cardiology
-
*Healthline does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.
Specialties*
Years of Experience
- 49 years of experience
Years of Experience
Years of experience represents how long a provider has been practicing in their field since graduating from medical school. Not all providers will have this information available.
Languages Spoken
- English, Arabic
Languages Spoken
NPI Number
- 1427052802
NPI Number
A National Provider Identifier (NPI) is a unique 10-digit identifier issued by the government to healthcare providers.
Education & Certifications
Medical Education
- University of Rochester
Medical Education
Board Certifications
- Cardiovascular Disease and Internal Medicine
Board Certifications
What’s a board certification and why is it important that my provider has one?
A board certification represents a provider’s dedication to ongoing training in one or more specialties, including the completion of intensive exams. While not all specialties have board certifications, if your provider does have one they’ve taken the extra step to master their specialty and to keep up with the latest advancements in their field.
A board certification represents a provider’s dedication to ongoing training in one or more specialties, including the completion of intensive exams. While not all specialties have board certifications, if your provider does have one they’ve taken the extra step to master their specialty and to keep up with the latest advancements in their field.
Frequently Asked Questions
Dr. Johnston accepts Aetna, Anthem Blue Cross and Blue Cross Blue Shield, and other major insurance plans. Please call ahead to confirm all accepted insurance plans.
Dr. Johnston has indicated that they do offer telehealth services. Please call the provider’s office at for more information.
Dr. Johnston works at
Dr. Johnston has seen patients for Supraventricular Tachycardia, Atherosclerosis of Aorta and First Degree Heart Block, and more. You can see other conditions treated by Dr. Johnston on their profile. Please call the provider’s office to confirm all visit reasons.
Dr. Johnston speaks Arabic.
13 patients have reviewed Dr. Johnston. The overall rating for this provider is 3.4. You can read verified reviews and ratings and leave your own review based on your experience with Dr. Johnston.
Whether a person prefers to schedule an appointment online or over the phone with Dr. Johnston, there are benefits to both methods. A person calling to schedule an with Dr. Johnston appointment can ask questions about the practice, provider availability, conditions treated, procedures performed, and if their insurance carrier is accepted. While online scheduling is quicker, easier, allows one to view a wide range of appointment times, and may provide the ability to sync with a personal calendar.
Related Articles
Telehealth Options
This provider has not specified a telehealth appointment method. Would you still like to make an appointment with Dr. Johnston, or would you like to choose another provider and have an online appointment right now?
Call now to make an appointment
(714) 543-5555