Warren D. Johnston, MD
Orange, CA 92868
- Mission Heritage Medical Group and Affiliated Physicians
- St. Joseph Heritage Medical Group and Affiliated Physicians
- St. Jude Heritage Medical Group and Affiliated Physicians
St. Joseph Heritage Orange - Cardiology
1140 West La Veta Avenue, Suite 430, Orange, CA 92868
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About Warren D. Johnston
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.
University of Rochester School of Medicine
1975
USC LA County Medical Center- CA
1978
UC Irvine Medical Center
1980
- American Board of Internal Medicine, Cardiovascular Disease
- American Board of Internal Medicine, Internal Medicine
Providence St. Joseph Hospital - Orange
Community Reviews
At Providence, we're dedicated to providing you quality, personalized health care. We are constantly striving to optimize your experience.
As part of ensuring you have a positive experience with Providence, our online provider directory includes ratings and patient comments for select providers. More about our survey.
Always first-rate. The cardiology suite runs like a "well-oiled machine" - extremely organized!!!
Providence Patient
I appreciate the advice of Dr. Johnston.
Providence Patient
Dr. Johnston is terrific.
Providence Patient
Dr. Johnston is always professional and a great doctor
Providence Patient
Dr johnston is very professional, personable, and a great doctor
Providence Patient
My Doctor is so easy to talk too , it's like talking to a friend .
Providence Patient
No serious complaints. He just talks very fast using medical or body function terms that I'm not that familiar with. He'd explain if I asked for it but it would be nice if he'd slow down a bit and explain in laymen's terms. Overall I'm satisfied.
Providence Patient
Dr Johnston and staff are professional and provide outstanding care!
Providence Patient
I like Dr. Johnston, sometime he speaks too fast for me to understand what he says.
Providence Patient
Dr. Seams like part of our family!!!
Providence Patient
I love my doctors: Dr Lian Bach; Dr Liwanpo; Dr Johnston; Dr Mehta
Providence Patient
He has always taken good care of me
Providence Patient
Dr. Johnston was very helpful and concerned about my health and all that I am going through. He is an excellent physician.
Providence Patient
Very good, everyone knew what to do, my Dr. The best.
Providence Patient
The doctor was very attentive to my needs
Providence Patient
Provided info on the problem I saw him for,made a change in amount of medication and explained why, and told me what symptoms to report as a result of this change. Also told me when he wanted to see me again. I saw this visit as very beneficial.
Providence Patient
Dr Johnston has always been excellent in handling my care. I am confident in his care and ability.
Providence Patient
Have always had a positive experience at this office over the years.
Providence Patient
My visit to the office, from the time I walk into the office, and check in is stress free. Dr. Johnston is alway so professional, yet so very attentive and kind, he puts me at ease, during the visit, I know he truly cares about me, Dr. Johnston has been my Cardiologist for over 16 years, I feel I receive the best possible care from him, when I leave after my visit, I'm always relieved and confident about what was discussed, and clear as to what, if any additional tests, the next steps are to be scheduled.
Providence Patient
Very good, courteous and respectful to the issue at hand.
Providence Patient
Excellent care from Dr. Johnston. He is very thorough.
Providence Patient
I really respect this office doctor and staff! They are always informed as to my care and time.
Providence Patient
Dr. Was my husband's Dr for many years. Now he's my Dr and treats me especially well as we have a history.
Providence Patient
All good
Providence Patient
I do like my cardiologist I just wish he will spend more time with me so I can ask more questions
Providence Patient
Although I had an unusually long wait in the exam room, my doctor was highly apologetic, explaining that the patient ahead of me had some unusual issues to address, which I understood and about which I was not upset. It is actually good to know that if I ever require extra time at my appointment, my doctor is personally concerned enough about each individual patient that he will spend extra time with me, as well. He is not a "cookie cutter" doctor!!!!
Providence Patient
Dr Johnston is an experienced Professional, I think he is the best
Providence Patient
Dr johnston always takes time to listen to my concerns.
Providence Patient
I feel very comfortable in Dr. Johnson's care. He has always reacted quickly to any of my medical needs and questions.
Providence Patient
Good experience
Providence Patient
Dr. Johnston is being cautious in ordering tests after my emergency room visit.
Providence Patient
I appreciate that my doctor knew so much about my recent medical history and test that I'd had performed for other doctors.
Providence Patient
Things be good
Providence Patient
All good
Providence Patient
Provider very good doctor and been my doctor over 20 years.
Providence Patient
I've been Dr. Johnston patient for several years.If you noticed on one of your questions I gave a 9 instead of a 10.The only reason is because no matter how exceptional the quality of care is.None of us are perfect, and there is always room for improvement in all of us. He is easy to talk with, he listens to your questions/concerns and never makes you feel rushed.You will find this to be true not only with the front office lady's, but the back office staff as well.If they say they'll get back with you as soon as possible, they mean it.Thank you for giving me an opportunity to share my thoughts with you.God Bless
Providence Patient
Good
Providence Patient
It was a good experience and my problem was resolved following a proceure
Providence Patient
Dr. Johnston and his staff were outstanding.
Providence Patient
Dr Johnson is the best
Providence Patient
ALL EXPERIENCES WITH DR. JOHNSTON ARE ALWAYS GOOD.
Providence Patient
Dr.Johnston is always professional with knowledges to explain to me.
Providence Patient
All good
Providence Patient
Dr. Johnston is extremely thorough in his questions, checking, and all things responding to patients care. Extremely satisfied.
Providence Patient
All good.
Providence Patient
As of right now this provider is treating my daughter also, and we are both happy with him!
Providence Patient
Very good & very professional. Answered all my questions & made sure I understood everything.
Providence Patient
Very Good staff, great doctor.
Providence Patient
Excellent
Providence Patient
Dr. Warren Johnston is a great provider!
Providence Patient
I have been very happy with my Heritage providers.
Providence Patient
Dr Johnston is a great doctor and always takes the necessary amount of time with me
Providence Patient
All doctors in the Providence St Joseph system are top notch and I always tell friends and relatives about how pleased I am with the whole group.
Providence Patient
I had good experience. Thanks.
Providence Patient
He is the best cardiologist !
Providence Patient
Dr. Johnson is very thorough and his examinations explains everything well, orders appropriate test, and makes an appointment to have a follow up visit regarding all of test. I've been seeing him for a long time I think he's wonderful.
Providence Patient
Dr. Johnson is the best.
Providence Patient
I went to urgent care follow up to make a sure I didn't have pneumonia following Covid. Dr at urgent care suggested to follow-up with cardiologist
Providence Patient
I really like working Providence. The only problem I have is the wait time for scheduling an urgent appointment due to having an [ID] and needing an authorization.
Providence Patient
Always a good experience with Dr. Johnston.
Providence Patient
Good experience. Answered questions about my cardiac care and meds I'm taking.
Providence Patient
Excellent experience!
Providence Patient
Prompt efficient met my needs and expectations.
Providence Patient
Dr. Warren Johnston is the best doctor and highly recommend him always!
Providence Patient
All good! Consistently professional office staff and great doctor!!
Providence Patient
Very limited time the doctor spent with me
Providence Patient
Everyone is friendly and make you feel at ease
Providence Patient
He's a good Doctor and treats me well
Providence Patient
All excellent experiences with Dr. Johnston.
Providence Patient
Doctor and staff very professional. Left my visit feeling well taken care of.
Providence Patient
Good..
Providence Patient
Dr. Johnston is very focused patient physician!
Providence Patient
Dr Johnston has been my cardiologist for 38 years. A very special man.
Providence Patient
Always great, for more than 30 years
Providence Patient
On time. Efficient.
Providence Patient
This appt. Was a follow up of the installation of a A-fib /pacemaker monitor. I felt it went as good as possible and was given an explanation of future care.
Providence Patient
Great
Providence Patient
Dr Warren is an excellent doctor. He is very caring and very professional. He wants to see my bad Chlostrol improve He has changed my chlostrol medicationAnd he has assigned few test to be done after taking the new medication for couple months. I will recommend him to all my friends and family.
Providence Patient
Just that the service was EXCELLENT and the cardiology suite is run like a "well-oiled" machine!! IMPRESSIVE...
Providence Patient
I never recommend to other about who they should see as a doctor. Dr Johnston is excellent I just never recommend sorry.
Providence Patient
I see Dr Johnston yearly
Providence Patient
He is excellent. My wife and I have had excellent care and response from the Providence providers. Thank you
Providence Patient
Dr. Johnston is an excellent physician. His office staff is excellent and very responsive to patient care.
Providence Patient
Always professional.
Providence Patient
I have always had a good experience with Dr Johnston and his staff
Providence Patient
I have always had a good experience with this cardiology team. Dr Johnston and staff are always helpful, courteous and attentive.
Providence Patient
Dr Johnson is very good and personable. Always get answers to my questions. Feel great when I leave after visit
Providence Patient
I feel Dr. Johnston. Staffing team take care of me were very well. I prefer them to anybody.
Providence Patient
He has always taken good care of me
Providence Patient
Dr Johnston is my Cardiologist. He is friendly, courteous and highly knowledgeable.
Providence Patient
I saw Dr Johnston quickly, he was thorough, listened to all my questions & answered to my satisfaction. The doctor and staff are extremely courteous, efficient and went over and beyond expectations for this visit. Many kindnesses were extended by both Dr Johnston and his staff during this particular visit and it was very touching and much appreciated! I've recommended Dr Johnston to close friends, as well.
Providence Patient
I am a new patient with atrial fib age 78 Dr Johnston was very informative and polite. Than you
Providence Patient
I always have a good experience
Providence Patient
Everything was great
Providence Patient
He is very knowledgeable and caring.
Providence Patient
This is a great cardiac practice dr johnston is excellent and dr kim
Providence Patient
I received excellent care from the doctor and his staff.
Providence Patient
Professional courteous
Providence Patient
Dr. Johnston is knowledgeable and respectful.
Providence Patient
I had 2 tests an MRI and one test where they injected radiation into my bloodstream. Both went very well and smoothly. Very nice people.
Providence Patient
I prefer Dr. Johnston to my PCP
Providence Patient
Have had this doctor for over 20 years and have excellent treatment with him. Very satisfied.
Providence Patient
The time with the Dr was less than I spent waiting for him to come into the room. He spent 5-7 minutes with me. Placed his stethoscope on my chest, back and both sides of my neck. It was so brief that I can't believe he actually heard or listened for anything. He just went through the motions but did not appear to actually do anythingHe stated he ordered blood work during my last visit but never received the results. I received my test results shortly after having blood drawn and was able to review them on your website. A year has passed since he ordered the tests and he has not reviewed them nor contacted me about "not receiving the results". If there was/ is something wrong he missed it / did not address it for a whole year!!!!!I'm not sure I will continue seeing this Dr. Between co-pay and parking I'm out $[ID] plus 2 hours out of my day. In the end I did not see any purpose for the visit.
Providence Patient
I finally found someone who takes my family history seriously. For years, primary care providers have said that I'm fine, even with elevated cholesterol, because all my other numbers are good and I am at a very low risk for heart disease. He listened and ordered tests which showed that my concerns about family history were valid. I don't understand providers blowing off that my dad and grandfather died in their 50's, and my aunt and grandmother died in their 40's, all from heart attacks. My dad had his first at 42. I think more family doctors should be trained in taking genetics more seriously. Dr. Pitzer was the first to agree I should be medicated even though the formula states I'm low risk, and Dr. Johnston is the first to order tests to check to see if I had heart disease which I do. This has been a concern of mine for over 10 years.
Providence Patient
All good.
Providence Patient
Very good service
Providence Patient
Minimal wait time. Adequate time with the doctor. Easy checkout, scheduling testing and follow up .
Providence Patient
Dr. W. Johnson inspired me to follow his advice as I noticed he himself lost weight in a healthy way. I was inspired and will follow his lead. Thanks and grateful to know my heart is good.
Providence Patient
My family and I have nothing but highest regards for Dr. Johnston, his staff and his auxiliary physicians that work with him. We have always been made to feel comfortable and welcome and that any problem was not too big or too little for them to take a look at as a matter fact it has been several years since I had seen, saw Dr. Johnson as a matter of course before postop preop Test, and it had been a number of years before I called him back with a condition that needed his expertise. We are very grateful to be his patience. We are grateful to be in the office, where he has everything that he needs to conduct, timely, thorough, expeditious , state of the art exams at [Name(s)] again, thank you for the opportunity to work with Dr. Johnston and his staff. Sincerely, [Name(s)] and daughters. OK
Providence Patient
Excellent Dr; explained details in a clear and understandable way
Providence Patient
Dr.Johnston has been my primary Cardiologist since 1997.He Is best doctor ever.
Providence Patient
I don't have to wait for a long time for my appointment
Providence Patient
I am very happy with my care providers. They are all professional, friendly and courteous. I am pleased with services provided by your group - so far it has been a great experience. Thank you to you all.
Providence Patient
He wants to be sure I am doing okay, so he sees me every six months!
Providence Patient
His office staff had not followed thru at last visit to make Appt. With an Associate before this visit. Thus, he was unable to access my progress thus far. However, I must say that he made sure that I left this visit with all that was needed of me to do, and his staff was very thorough with what was necessary for me to do, and I left very pleased with their thoroughness and of Dr. Johnston.
Providence Patient
Love Dr. Johnston
Providence Patient
Everything was great
Providence Patient
Your doctors and health staff always provide the best care and they are caring and concerned.
Providence Patient
Dr. Johnston is always very approachable. I'm very comfortable talking to him about any concerns that I have.
Providence Patient
Dr Johnson is my cardiologist. I would rate my confidence in his medical opinions as very high!
Providence Patient
Dr Johnston was very attentive, listened carefullly, answered all my questions completely, was on time for my appointment and never rushed me! His staff is outstanding - very efficient and friendly. They do their best to arrange all my appointments around my schedule and in a timely manner!
Providence Patient
Always have good experience with doctor, I expressed my issues and founding with doctor, he respected my inputs.
Providence Patient
Dr. Listened to me and answered all questions I had.
Providence Patient
Experience was wonderful
Providence Patient
Great job to all
Providence Patient
All of my encounters from the receptionist, the person who took me to the exam room, to Dr. Johnston were all very courteous, friendly, caring, and professional.
Providence Patient
He was aware of the difficulties with my husband's health and understanding of the stress.
Providence Patient
Caring and knowledgeable Doctor.
Providence Patient
Doctor Warren David Johnston is the best cardiologist.
Providence Patient
No complaints
Providence Patient
Always a good experience.
Providence Patient
Keep up the good work!!
Providence Patient
Clinical Interests
- Abnormal Coronary Angiography
- Abnormal Stress Test
- Acute Bacterial Endocarditis
- Acute Decompensated Heart Failure
- Adenosine Stress Test
- Aneurysm Of Leg Artery
- Anticoagulation
- Aortic Diseases
- Aortic Valve Disease
- Arrhythmia
- Atherosclerosis
- Athletic Heart Syndrome
- Atrial Fibrillation
- Atrial Flutter
- Atrial Septal Defect (Asd)
- Atrial Tachycardia
- Atrioventricular Block
- Atrioventricular Septal Defect
- Autoimmune Pericarditis
- Bicuspid Aortic Valve
- Bradycardia
- Cardiac Angina
- Cardiac Insufficiency
- Cardiac Rehabilitation
- Cardiac Risk Assessment
- Cardiac Tumor
- Cardiomegaly
- Cardiomyopathy
- Cardiorenal Syndrome
- Chest Pain
- Cholesterol Disorders
- Cholesterol Management
- Claudication
- Congestive Heart Failure (Chf)
- Coronary Artery Calcification
- Coronary Artery Disease
- Dobutamine Stress Test
- Echocardiogram
- Eisenmenger Syndrome
- Exercise Intolerance
- Familial Arrhythmias
- Familial Dilated Cardiomyopathy
- Familial Hypertrophic Cardiomyopathy
- Family History Of Sudden Cardiac Death
- Giant Cell Myocarditis
- Heart Failure Screening
- Heart Murmur
- Heart Racing
- Heart Valve Disease
- Holter Monitor
- Hypertrophic Cardiomyopathy
- Idiopathic Hypertrophic Subaortic Stenosis
- In Office Cardiac Stress Test
- Infiltrative Disorders Of The Heart
- Inflammatory Heart Diseases
- Ischemic Cardiomyopathy
- Left Bundle Branch Block
- Left Heart Failure
- Left Ventricular Dysfunction
- Mitral Regurgitation
- Mitral Valve Disease
- Mitral Valve Prolapse
- Mitral Valve Regurgitation
- Mitral Valve Stenosis
- Myocardial Infarction (Mi)
- Myocarditis
- Orthopnea
- Palpitations
- Patent Ductus Arteriosus
- Patent Foramen Ovale
- Patent Foramen Ovale Closure
- Pericardial Effusion
- Pericarditis
- Pre Excitation Syndrome
- Premature Ventricular Contractions
- Prinzmetals Angina
- Pulmonary Artery Stenosis
- Pulmonary Edema
- Pulmonary Valve Disorders
- Pulmonary Valve Insufficiency
- Pulmonary Valve Stenosis
- Refractory Angina
- Rheumatic Aortic Regurgitation
- Rheumatic Aortic Stenosis
- Rheumatic Diseases Of Pulmonary Valve
- Rheumatic Heart Disease
- Rheumatic Heart Failure
- Rheumatic Mitral Regurgitation
- Rheumatic Mitral Stenosis
- Right Bundle Branch Block
- Secondary Hypertension
- Sick Sinus Syndrome
- Sports Related Cardiovascular Assessment
- Stress Echo Cardiogram
- Subaortic Stenosis
- Supraventricular Tachycardia
- Syncope
- Tachycardia Bradycardia Syndrome
- Thallium Stress Test
- Transesophageal Echocardiography
- Transthoracic Echocardiogram
- Tricuspid Regurgitation
- Tricuspid Valve Disease
- Valve Stenosis
- Valvular Endocarditis
- Valvular Heart Disease
- Vasovagal Syncope
Excellent and highly recommend
Providence Patient