Professional Summary


Education & Certifications
  • Board Certification: American Board of Internal Medicine, Clinical Cardiac Electrophysiology (2019)
  • Fellowship: UCSF Dept of Cardiology (2007) CA
  • Fellowship: UCSF Dept of Cardiology (2005) CA
  • Medical Education: University of California at San Francisco School of Medicine (1999) CA
  • Residency: Hospital of the University of Pennsylvania Dept of Internal Medicine (2002) PA

Publications

Clinical Trials

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Open trials refer to studies currently accepting participants. Closed trials are not currently enrolling, but may open in the future.


Practice Locations


Cardiac Arrhythmia Service at Palo Alto Stanford, CA
Stanford, CA

300 Pasteur Drive, 2nd Floor

Stanford , CA 94305

(650) 723-7111

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Adult Congenital Heart Program Stanford, CA
Stanford, CA

300 Pasteur Drive, 3rd Floor, A32

Stanford , CA 94305

(650) 724-9220

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Adult Congenital Heart Program at Stanford Stanford, CA
Stanford, CA

300 Pasteur Drive, 3rd Floor, A32

Stanford , CA 94305

(650) 724-9220

Make An Appointment More Clinic Information » Getting Here »

Heart & Vascular Clinic San Jose San Jose, CA
San Jose, CA

2585 Samaritan Drive, Floor 2

San Jose , CA 95124

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Cardiac Arrhythmia Service in San Jose San Jose, CA
San Jose, CA

2585 Samaritan Drive, Floor 2

San Jose , CA 95124

(650) 723-6459

Make An Appointment More Clinic Information » Getting Here »

Patient Ratings

(35 Ratings)

Overall Rating
4.9/5

View Ratings by Category

4.9/5
Friendliness
Friendliness/courtesy of the care provider
4.9/5
Explanations
Explanations the care provider gave you about your problem or condition
4.9/5
Listens
Concern the care provider showed for your questions or worries
4.9/5
Care provider's efforts to include you in decisions about your care
Care provider's efforts to include you in decisions about your treatment
4.9/5
Recommended to others
Likelihood of your recommending this care provider to others
0.0/5
Wait times
Wait time at clinic (from arriving to leaving)

How Our Ratings Work

The Patients Ratings and comments are gathered from our Patient Satisfaction Survey and displayed in their entirety.

Patient Satisfaction Survey Disclaimer

Patient Reviews

(243 reviews)

He is great
Best electric doc on the planet!!!!
He’s just such a nice, caring physician. He explains things and listens.
Dr V able to explain every detail so patient knows the plan and what to expect.
I would like to highly commend Dr Mohan Viswanathan - it has been an invariable pleasure consulting with him over the years. One of the best!
Dr. Viswanathan is compassionate and provides quality care.
He answered all of our questions and provided a lot of great information. I feel confident in the treatment I am receiving from him
He was very informative and answered my questions
Excellent
I appreciate his surgical skills as well as his kind and communicative manner.
Very thorough and considerate doctor. As a patient I always feel that I am heard.
Excellent personality, communication and knowledge.
He is a good caring doctor.
He is a good man , and my wife and I like him
Very well spoken clear loud. Very patient. Very calm. Did not feel rushed. I appreciate that very much.
Dr. V. took time to explain things to me clearly and to where I understood, which is what my goal for this video visit was.
Dr. Mohan is an excellent physician and I am so very thankful he is my ongoing treating physician and surgeon.
Doc V is a great Doc and person !
Outstanding physician. Couldn’t be more pleased to be under his care.
Amazing doctor. Very confident in him.
I feel extremely fortunate to have had Dr Viswanathan manage my cardiac condition over the years. He is the best, no question.
Terrific!
Dr. Viswanathan was very gracious and helpful in discussing all the issues I had and all the options I had to consider. He also delineated the next steps he would take care of to move us forward.
Spent time with me and answered questions with patience
ABSOLUTELY OUTSTANDING! VERY INFORMATIVE AND PROFESSIONAL.
I am very comfortable with his responses and concerns.
I felt all went very well. Dr. Viswanathan was easy to talk to and provided all the answers to my questions, as well as a plan for how to proceed.
Very pleased to have Dr. Viswanathan as my doctor
I have the greatest respect for Dr, Viswanathan’s skill, reasoning, and ability to communicate clearly. He is a great representative of the excellence of Stanford’s medical program.
Great doctor and skilled surgeon. He fixed my heart.
Very intelligent and caring doctor.
Dr.Viswanathan was very attentive listening to my concern and providing very useful input to my case. The nurses and the technician nurse were very attentive, answering my questions and very clear in their exlpanations
Outstanding interaction and advice!
It was great talking with him, he was very personable. He answered all my questions and he did not talk over my head.
I very much appreciated that he is looking at the whole heart, into issues that have been ignored in attempts to get help in years past. With further tests he is refining diagnosis for the most accurate treatment. He is not lumping my issues into one category. Therefore I have confidence that what he decides will be safest and the most successful!
Dr. V is very thorough, explains things well and verbalizes his next step planning well to patients.
He’s competent and a great doctor to work with I jusf wish his front offce was more competent And while I understand things get delayed but someone should be communicating that. It’s awfully self centered for stanford to think only their schedule matters
Mr. Mohan Viswanathan is such a fabulous doctor and my whole family couldn't be more thankful for the outstanding treatment he has provided to me.
Thank you!
Great, personable, professional, very proactive. Best doctor I have... and I see alot of specialists... in and out.of Stanford Medical.
Excellent doctor.
Excellent patient interaction
So smart, clear and kind. The best.
Dr Viswanathan is very personable, easy to talk to,explaings procedures well,is an excellent Dr.
Excellent both in skill and bedside manner. Also, a faithful Bay Area sports fanðŸ‘
he explained very detail
I really like these Video calls and am very impressed with Dr V skill on my Cardiac AFib issue and his detailed explanations...
Dr. Viswanathan is very clear about what he can do to treat my condition. I trust him completely.
He is great. Thouroughly explains. Careful, cautious and thoughtful.
Excellent Doctor!
Dr. Viswanathan is top notch all the way.
Best team ever
Dr. Viswanathan is excellent, I am extremely happy he is my specialist.
Very thorough, clear and friendly.
An excellent clinician who is gifted at patient interaction
Very through and on point.
the best
I like Dr. Viswanathan very much always a pleasure to talked to he cares about his patients
We feel really good about him!!!!
Dr. Viswanathan is an excellent doctor in my opinion - warm, kind, listens well, communicates clearly, responds well to questions, and is extremely knowledgeable. I would recommend him highly to anyone looking for a cardiologist for arrhythmia problems.
Dr Viswanathan is an outstanding doctor. He is very compassionate and caring and has always taken the time to explain things clearly.
Very easy to talk with, he's very patient, explains well and addresses all of my questions and issues clearly, calmly, and competently.
The information he gave me was clear and easy to understand. He was also very open to my comments. His reply to what I had to say was clear and easy to understand.
I enjoyed our chat and he let me know what could be instore for me in the future. I hadn't seen him since 2019. But it always great to know he's there when I need him.
He is excellent- I am confident he will provide the care I need. If I go ahead and have the cardio version I will only have it if Dr. Viswanathan is the lead.
More motivated and less anxious about proceeding with medical procedure, due to demonstrated capacity and intelligence.
Thank you very much.
Answered all my questions. Very professional.
Good communicator! Explained things well!
Very nice doctor who took the time to answer all my questions and disvuss all my options.
He a very good Dr, kind, informative, understanding.
I expressed my gratitude, trust and confidence in Dr Mohan in the previous text . In summary, I and my IHSS care provider are very happy with Dr Mohan, and feel trust and confidence with him healing my heart. :)
For being ill, he was very nice, and I felt relaxed speaking with him. My daughter, (she is a nurse) listened with me. He explained everything, and he still wants more testing, which will be set up. He also made me feel better about my condition.
the best
Very professional and knowledgeable.
Great conversation.
Good doctor!
Dr. Mohan Viswanathan is a highly competent, caring and compassionate doctor during the past five years I have been under his care.
Great guy, I enjoyed our meeting.
Very friendly and listened well. Hopefully we will be able to have an in person visit for the future.
Pleased with his knowledge Of best way to deal with a fib
Very easy to talk to and he is very on top of my case.
Dr. Viswanathan really listens to what I have to say as well as explaining what my medical situation is and what the plan for my care going forward is.
He listens and answers all the questions I have.
He is a SUPERB doctor. I really appreciate his help!
The doctor was very helpful.
Trustworthy and competent
He is a wonderful doctor!
An unusually clear communicator. I am most grateful to him for that. It’s a rare gift. Thank you!,
Thank you clarifying everything . I appreciate you .
DR. Viswanathan has a super personality that makes you very very comfortable and his experience and knowledge is unsurpassed. Truly grateful he is my Cardiologist.
Dr. Viswanathan strikes me as very knowledgeable and competent. He has very pleasant bedside manner. I am glad he is part of my team at Stanford.
After 75 years I’ve seen an innumerable number of doctors and Dr. Viswanathan is among the very best. His concern for my care, the attentiveness to what I had to say, his grasp of my medical history, and his evaluation of my future needs were flawless. On a scale of 1-10 with 10 being perfect, he ranks at 100.
Very informative good visit
Dr. Viswanathan was great. He explained well and answered all my questions. He is very knowledable.
I appreciated his warm, friendly greeting and clear explanations of needed tests to be done to prep for the upcoming cardiac ablation.
He is easy to talk to. Answered questions in a way I understood. Was thorough in his explanation about my procedure.
Doctor was extremely thorough in explaining what I could expect with my procedure. He asked many questions about me and let me know what would follow along the way. He mentioned his staff would be contacting me on the same day or the next. I couldn't have been more pleased and re-assured with him as the doctor who will be looking after me.
Attentive, courteous and professional
Dr. V is very knowledgeable and responsive. He is an outstanding physician.
He explained things very well. He gave me a very good understanding of the procedure that is recommended. It would have been nice if the camera could have captured him better. He looked down a lot and the camera was a bit too high. Rarely saw his full face
He is kind, well informed, professional
He's the best doctor I've ever had.
Wonderful clinician, technician with a wonderful bedside manner-. Feel so fortunate to have him as my cardiologist.
thanks for listening!
Dr. Viswananthan is an excellent physician with expertise, care and compassion.
Very perceptive. Quickly gets to the heart of the matter (no pun intended)
Great communicator, very comprehensive. Made me feel that he is really working in my best interest.
As I told Dr. Viswanathan I am very pleased with the results of my ablation and all of my followup care.
He's great. I always really enjoy speaking with him, and, he understands a lot about my perspective, given my biomedical science background.
I had a wonderful experience with Dr. Mohan Viswanathan and his coordinator team before and during the video visit. Everyone was courteous, professional, and made my visit as comfortable as they possibly could. I would recommend Dr. Mohan to anyone seeking a kind, professional and knowledgable cardiologist doctor.
Very attentive and caring.
Excellent and caring physician.
Good listener.
Dr. V and his team in the Cardiac Clinic are great. I am happy having them overseeing my health and all the pleasant interaction making sure I am well. Thank-you
He is a very confident, knowledgeable and comfortable to work with.
He is terrific.
excellent consult.exactly what i needed
Dr. Viswanathan did a very thorough job of explaining my condition and and possible procedure to explore problem electrical disconnects in my heart function. He explained the risks and about the procedure itself. He listened to my input and answered questions. I am very confident that he would be the best doctor to get to the root cause of the problem and take care of it. His expertise and dedication are evident.
Excellent bedside manner Extremely knowledgeable Generous with his time Makes sure to listen to the patient Gives confidence that follow-up will happen Confident, but not at all arrogant about it A "good guy"
Great Doc!
I WILL , HE IS A GOOD ...Dr.
Doctor was great.
He is an excellent doctor, very seasoned, expert, precise, caring and takes the time to study my case, thank you God for him!
He is very personable and detailed in video visits just as he is in person.
I really like Dr. Viswanathan. He is very friendly and always answers the questions I ask in an understandable manner.
Dr. Viswanathan was very open and provided all the answers I needed.
Very plesant, knowledgeable, informative, listened to and answered all my questions, never talked down to me, but I think I can still take him in a game of 9 ball.
I found him well informed and thoughtful.
I was very pleased how Dr. Viswanathan had all my information and answers from all the tests I had done.
Excellent physician! Thank you.
Very comfortable person to speak with. He also explained the various results in terms I could understand and the reasons for the next test to be done. A very reassuring individual, at a time when I needed to hear that for my own comfort level.
A very helpful and informative visit, which was appreciated
Excellent cardiologist; personable & caring; listened carefully to my concerns & provided input that was understandable & very helpful, especially given I need to convey this information to my daughter who is a surgeon.
Very personable and easy to tallk with -- candidly expressed his opinions, sincerely considered mine, and explained medical issues and his thoughts and opinions in an easy-to-understand manner.
We appreciated his candor, his expertise and his ability to answer our questions so that we could understand complex heart issues.
He is very knowledgeable and thorough and has a very caring manner
I was not looking forward to my first video visit. I felt like it was going to be too impersonal. I was wrong. Dr. Viswanathan put me totally at ease. He was prepared for my visit, I could tell he was familiar with my case. I appreciated everything about him. I feel confident of his conclusion to implant a defibrillator because he took the time to walk me through his reasoning. For this type of visit, video was the way to go. It was just a discussion, I didn’t need any vitals taken. And, I live in Roseville, so it saved me a trip, time, and money. Dr. V is sending me a Zio PAC, and saving the date for my surgery. Didn’t answer a previous question, wasn’t sure what sure what you were asking.
Dr is excellent. Very thorough. Very personable. Very patient.
incredibly patient, kind and knowledgeable. seem to always know ,all that he needs to know about my health situation. he is the best
Very informative and easy to talk to and he explained things very well. He allowed me to ask questions
It was good visit.
The appointment was very comprehensive and informative. It lasted less than the hour but it was very good. Dr. Viswanathan really knows his area and made me feel very hopeful that I will get well. Again, thank you for the opportunity to express my opinion.
Great service.
Dr Viswanathan makes the visit very comfortable and easy. Very concerned provider and will do anything for the betterment of his patients. Very knowledgeable in his field. He is very professional. Answered all the questions I had for him. I am so lucky to have him as my Arryhytmia physician.
Good doctor, I appreciated talking with him
He was very friendly and answered all my questions without making me feel rushed.
Very personable , listened to me, had reviewed my medical history, explained complex conditions well. Conveyed expertise in Electrophysiology.
Dr. Viswanathan is a caring and excellent dr. I appreciate all the time he spends and explains technical details and provides options for my health. I trust I am in the best hands with my health.
Excellent.
My wife and I were VERY impressed with Dr. Viswanathan. He was concerned about my issues and took the time to answer our questions as well as explain his recommendations.
Highly recommend Dr. Mohan. Also tech for pacemaker was excellent.
Excellent.
Very informative.
All are patiently.
Dr. Viswanathan explained the details of my condition very thoroughly.
Dr. Viswanathan is a great doctor technically and personally!
Excellent visit with an expert and very kind physician
good
My experience at Stanford and with Dr. Viswanathan has be excellent. I live outside of California and I am interested in learning the details of my condition and preventative actions I can take to help protect my health, and that is has been the result I have received. This is why I come to Standford for Care.
much better than UCSF EP experience
Dr. Viswanathan is a highly skilled, kind professional. He spends as long as it takes to answer my questions/concerns. I trust him immensely.
Dr. Viswanathan is very user-friendly. Plain speaking and good care!
He was very calm, patient, communicative. Is a great listener.
It was my first meeting with Dr. Viswanathan, and I was very favorably impressed. He is empathetic, very thorough, and I'm glad to now be his patient.
Very positive experience with this provider (doctor). Provider takes the time to thoroughly answer questions and explain. Very easy to communicate with this provider.
Care provider spoke slowly and clearly to my mom who is hard of hearing. Seems to be compassionate dr.
My interactions with Dr. V and staff, both medical and administrative was excellent. Dr. V was very generous with his time and willingness to answer my questions.
It was hard to believe the doctor took the time he did to answer all our questions and address all of our concerns. Heart surgery is obviously a big concern and he addressed all our issues and put my mind at rest. I left with the absolute confidence that he can fix my problem.
Dr. Viswanathan explained my tests results & SVT condition. He also addressed my questions about Primary Sjogren's Syndrome affecting my heart. We discussed the need for continued meds & having monitor test at the end of the year. I sincerely appreciate his professionalism and focus on my health. Thank you.
Dr. V. was excellent! His consult exceeded my expectations. Very thorough and careful to explain in simple terms. I'm confident I'm in good hands.
Dr. Viswwanathan very friendly & communicative.
Dr Viswanathan is excellent in all ways.
Dr. Viswanathan was very thorough kind, we understood what he was say and for future visit.
Dr. M. Nallicheri is the best! And he has a great team.
Dr. V. is a good communicator - extremely patient & generous with his time. Pleasant demeanor - exudes confidence.
Dr. Viswanathan is a gift to me. I feel very fortunate to have access to an outstanding doctor, except in his field.
Good.
Dr. Viswanathan has never been anything but extremely informative, unhurried, gracious, and courteous.
Dr. Viswanathan is outstanding & awesome doctor.
good
Good experience.
Dr. Mohan Viswanathan is not only a highly skilled professional, but also a practitioner of excellent interpersonal skills. I felt very comfortable discussing my health condition with him and felt greatly assured by his responses and support.
He is great!
Very impressed with the amount of time dr. spent with us.
Dr. V. was excellent to interact with. He was patient in explaining my medical issues. He didn't rush through my appointment.
Dr. Viswanathan is an excellent doctor. I travel from the East Bay to see him. He is attentive, gives good/understandable information, and focused. Really appreciate him. Thank you!
Dr. Visanathan very caring person. A very good listener. Understands the problem I presented. Josie Collins, RN showed concern to her patients. Well knowledgeable in her field.
Doctor was great. Listened and grateful he is treating my heart problem
This is the first time I have felt confidence with the care provided me.
Dr. V. is very down-to-earth, very friendly & open.
Very thorough....
The doctor and all staff were fantastic. I was completely impressed with the degree of time and attention given by the physician.
Good.
Dr. M. Viswanathan is a very dedicated medical practitioner who uses a patient-centered approach. His professionalism, people skills and communication skills are highly commendable. I am extremely fortunate to have him as my doctor.
I feel very grateful and privileged to have Dr. Viswanathan as my electrophysiologist. I have complete trust in his ability to perform my ablation surgery. He was very generous with his time, addressed all of my concerns and was very kind.
In my opnion, Dr. Viswanathan is an excellent surgeon. I would recommend him to anyone.
I feel privileged to be under the care of Dr. Viswanathan. He is obviously expert in his field of electro-physiology as well as cardiology. In addition, he gave me all the time necessary to address my arrythmia problems and to find a solution that requires an ablation procedure that he will perform.
Dr. V. was very professional & caring and clearly explained a good course of action for me.
Dr. was clean, friendly and definitely NOT an alarmist.
I have total confidence in Dr. Viswanathan. He combines expertise with kindness and consideration. I am very fortunate to be his patient.
I am very impressed and grateful at the kindness and care shown by my doctor. I felt he took his time and genuinely listened and cared for me.
Dr. Viswanathan is a excellent doctor.
I am so happy to have Dr. Viswanathan as my doctor!
Dr. Viswanathan is an excellent physician with a particularly high level of clinical skills and patient compassion. One of the very best I have ever had.
I was extremely pleased with both the calm patience of the doctor as well as the quality and quantity of time he spent with me. My expectations were exceeded.
Nice Dr. Viswanathan came he was excellent in explaining everything & answering our questions.
I never felt rushed and all of my questions were answered to my satisfaction.
I have been seen by three excellent physicians and each person has spent time explaining various conditions.
Dr. Viswanathan and his team are great!! I am lucky to have him as my dr. Outstanding dr.!!
Dr. M. Viswanathan is excellent and I always enjoy talking with him. He has a pleasant demeanor, is encouraging and motivating.
Dr. V. is thorough and well worth waiting for. He is personable and goes over all information about my heart.
The care provided by the NP was excellent. Dr. M. Viswanathan has the highest level of professionals and people skills. He was friendly, courteous, communicative, supportive and most reassuring. I believe that I am in the good hands of Dr. Viswanathan.
It is a rare opportunity to have care from such a distinguished and kind person.
Dr. Viswanathan gave an extraordinary amount of his valuable time. With his help, he allowed me to pick the very best biventricular pacemaker and monitor for my needs. I have complete confidence in his surgical ability.
With no reservation the attendance by all the professionals were excellent.
Dr. Viswanathan was excellent and worth waiting for.
What I like about the teams at Stanford is that they treat you like an intelligent adult. As a RN this is greatly appreciated.
Dr. Viswanathan communicated very well and took the time to explain everything clearly until I understood my condition.
Excellent.
dr.viswanathan goes above and beyond in explaining and listening to my concerns
Physician took all the time I needed to have my questions answered. Excellent communication.
This guy is the best anywhere. He totally cured my heart by rhythm problem now it doesn't miss a beat ever!
Excellent doctor.
Dr. Viswanathan is a great doctor, and I am really grateful he did not rush my appointment and took all the time to make sure all my questions were answered and that I understood everything that is going on.
Great on all appointment.
Dr. Visenwathen was very pleasant, kind, and caring. I felt like he really listened to my concerns and devised a plan of care to address them.
Dr. Viswanathan was great. Explained the procedure and condition clearly - Very comfortable with him as my doctor.
In every area, again, the care and consideration has truly been excellent. Everybody here, at eery level that I'very experienced so far, has shown remarkable professionalism, consideration and good will.
He is like a friend.
I felt confident in this care provider - until I met with another doctor who said I could try a different medication that might preclude surgery.
Dr. Viswanathan epitomizes the perfect doctor. Very approachable and extremely caring. I've never had a better experience with a physician. Absolutely and without hesitation I would recommend him to my friends.
Care provider is excellent. Best I've ever had.
All good.
Nine working days later, still have not received report from the doctor, and I don't think my primary care physician has received one either.
Dr. Mohan Viswanathan grasp of the subject, approved explanation and treatment are excellent is very very good.
this physician was fantastic. He listened to what I had to say and was thorough in explaining all aspects of my condition. Flexible in finding solutions to meet for my needs for medications. Extremely informative
My stress level went down after my time spent with Dr. Viswanathan.
They saved my life. I can't thank you enough.
An excellent doctor in every respect. #1. Fantastic!
Dr. Viswanathan is excellent doctor. Very caring and friendly.
excellent listening skills of the provider, great care of understand your concerns, take the time to answer all questions. would recommend stanford care as the best in the whole bay area.
Excellent experience.

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