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“My guiding principle is; the right care, for the right patient, at the right time. To be delivered with compassion and respect.”

Provider Bio down arrow

Dr. Sanjay Kumar, Electrophysiologist, specializes in treating arrhythmias, which are abnormally slow or fast heart rhythms. 


Arrhythmias, can cause dizziness, palpitations, chest pain or loss of consciousness, which can lead to sudden cardiac death.

He joined Marshfield Clinic Health System in 2014.

Dr. Kumar offers interventions like implantation of cardiac pacemakers or defibrillators, or ablation therapy for atrial and ventricular arrhythmias, as well as counseling, lifestyle modification and drug therapies. “I want to help my patients reach their health goals and enjoy an active lifestyle. I work to alleviate their anxiety and answer questions,” he said.

“I have been fortunate to visit many places in the United States. My best experiences have been in the Midwest where living and work are complemented by superb communities and natural beauty. Wausau enjoys the fortunate combination of large city amenities, easy access to the great Northwoods and small-town hospitality,” said Dr. Kumar.

In his free time, Dr. Kumar likes spending time with his wife and daughter reading, swimming, playing tennis, squash or racquetball and going for walks. “My daughter and I love painting and doing art projects together. I also enjoy books related to statistics, history, psychology and philosophy,” said Dr. Kumar.

Dr. Kumar received his medical degree from the Institute of Medical Sciences, BHU, in Varanasi, India. He then completed his internship and residency in internal medicine at SUNY Downstate Medical Center in New York, where he also completed his fellowships in cardiology and electrophysiology. He specializes in hypertension, nuclear cardiology, echocardiography, cardiac rhythm device management and advanced electrophysiology procedures.

Professional Summary down arrow

  • Medical School
    Banaras Hindu University - Institute of Medical Sciences Varanasi, Uttar Pradesh, India, M.D. 1995

    Internship
    State University of New York Downstate Medical Center Brooklyn, NY, United States, Internal Medicine 1998

    Residency
    State University of New York Downstate Medical Center Brooklyn, NY, United States, Internal Medicine 2000

    Fellowship
    State University of New York Downstate Medical Center Brooklyn, NY, United States Cardiology 2013

    State University of New York Downstate Medical Center Brooklyn, NY, United States Electrophysiology 2014

  • Professional Societies
    American College of Cardiology American College of Physicians American Heart Association American Society of Hypertension Heart Rhythm Society

    Board Certifications
    Cardiovascular Disease: 2013 Electrophysiology: 2014 Internal Medicine: 2000, recertified 2010

    State Licenses
    Ohio Wisconsin

Patient Ratings down arrow

4.6
out of 5 (82 ratings, 21 comments)
4.6
Provider explanations of my problem
4.7
Provider concern for my questions
4.6
Provider's efforts to include me in treatment decisions
4.6
Provider's discussion of proposed treatment
4.7
My likelihood of recommending this provider

Patient Comments down arrow

Comments are also gathered from the Press Ganey patient satisfaction survey and displayed in their entirety with the exception of any language that may be considered slander, libel or contain private health information, which will be removed prior to publishing.
Comments are from Press Ganey surveys. Slander, libel and private health information are removed.
Sort by:
December 30, 2020
The phone call was very calming, and informative. Put me at ease. My care provider covered everything with my doctor.
March 19, 2021
Dr. Kumar is wonderful! He is always willing to take the extra time to go over something ONE more time for me to take notes for dad.
May 4, 2021
Dr. Kumar is a very concerned health care provider. He is extremely good at answering all questions & concerns and explains things very well with drawing pictures for explanations. He seems very concerned about my well-being as well as my recovery process.
October 15, 2021
Very good, understandable & thorough discussion on treatment options, including me in decision making. Dr. Kumar is a very caring provider and an expert in his field.
December 14, 2021
Dr. Kumar is great! Thorough!
December 30, 2021
Dr. Kumar is a great and caring doctor!
January 6, 2022
Dr. Kumar is excellent!
February 25, 2022
Re-establishing care with Dr. Kumar. He was and continues to be kind, insightful, culture edge in his treatment and patient. He is an excellent provider and so appreciate being back as his patient
March 17, 2022
Took time to explain and discuss. Seemed confident and experienced, put is at ease.
May 10, 2022
Excellent physician!
May 24, 2022
Came away feeling good about the phone visit.
May 24, 2022
For Dr. Kumar - there should be an "excellent" column for each question - He sincerely cares about each patient and delivers flawless care. He never misses one detail, test, symptom. His knowledge, ...view full comment
June 3, 2022
Dr. Kumar listens to his patients & is very thorough.
July 12, 2022
Dr. Kumar is an exceptional listener and he had good suggestions and a great plan of action for the next year. I trust him with my care; that I choose to keep him as my heart provider
July 27, 2022
He is the best dr. for the heart that know.
November 17, 2021
Dr. Kumar prescribed procedures which I'm sure will give a diagnosis. After the diagnosis is made, based on the procedures, I'm sure he'll explain my health problem very well.
April 12, 2021
I felt he did a great job of listening and supported testing to help find out why. He also was patient with my list of questions.
September 21, 2022
I recommended my sister to Weston & Dr. Kumar.
February 1, 2022
All good.
February 11, 2022
I was treated well
October 21, 2022
Again all good.
February 1, 2022
All good.
February 11, 2022
I was treated well
October 21, 2022
Again all good.
September 21, 2022
I recommended my sister to Weston & Dr. Kumar.
April 12, 2021
I felt he did a great job of listening and supported testing to help find out why. He also was patient with my list of questions.
November 17, 2021
Dr. Kumar prescribed procedures which I'm sure will give a diagnosis. After the diagnosis is made, based on the procedures, I'm sure he'll explain my health problem very well.
December 30, 2020
The phone call was very calming, and informative. Put me at ease. My care provider covered everything with my doctor.
March 19, 2021
Dr. Kumar is wonderful! He is always willing to take the extra time to go over something ONE more time for me to take notes for dad.
May 4, 2021
Dr. Kumar is a very concerned health care provider. He is extremely good at answering all questions & concerns and explains things very well with drawing pictures for explanations. He seems very concerned about my well-being as well as my recovery process.
October 15, 2021
Very good, understandable & thorough discussion on treatment options, including me in decision making. Dr. Kumar is a very caring provider and an expert in his field.
December 14, 2021
Dr. Kumar is great! Thorough!
December 30, 2021
Dr. Kumar is a great and caring doctor!
January 6, 2022
Dr. Kumar is excellent!
February 25, 2022
Re-establishing care with Dr. Kumar. He was and continues to be kind, insightful, culture edge in his treatment and patient. He is an excellent provider and so appreciate being back as his patient
March 17, 2022
Took time to explain and discuss. Seemed confident and experienced, put is at ease.
May 10, 2022
Excellent physician!
May 24, 2022
Came away feeling good about the phone visit.
May 24, 2022
For Dr. Kumar - there should be an "excellent" column for each question - He sincerely cares about each patient and delivers flawless care. He never misses one detail, test, symptom. His knowledge, ...view full comment
June 3, 2022
Dr. Kumar listens to his patients & is very thorough.
July 12, 2022
Dr. Kumar is an exceptional listener and he had good suggestions and a great plan of action for the next year. I trust him with my care; that I choose to keep him as my heart provider
July 27, 2022
He is the best dr. for the heart that know.
December 30, 2020
The phone call was very calming, and informative. Put me at ease. My care provider covered everything with my doctor.
March 19, 2021
Dr. Kumar is wonderful! He is always willing to take the extra time to go over something ONE more time for me to take notes for dad.
April 12, 2021
I felt he did a great job of listening and supported testing to help find out why. He also was patient with my list of questions.
May 4, 2021
Dr. Kumar is a very concerned health care provider. He is extremely good at answering all questions & concerns and explains things very well with drawing pictures for explanations. He seems very concerned about my well-being as well as my recovery process.
October 15, 2021
Very good, understandable & thorough discussion on treatment options, including me in decision making. Dr. Kumar is a very caring provider and an expert in his field.
November 17, 2021
Dr. Kumar prescribed procedures which I'm sure will give a diagnosis. After the diagnosis is made, based on the procedures, I'm sure he'll explain my health problem very well.
December 14, 2021
Dr. Kumar is great! Thorough!
December 30, 2021
Dr. Kumar is a great and caring doctor!
January 6, 2022
Dr. Kumar is excellent!
February 1, 2022
All good.
February 11, 2022
I was treated well
February 25, 2022
Re-establishing care with Dr. Kumar. He was and continues to be kind, insightful, culture edge in his treatment and patient. He is an excellent provider and so appreciate being back as his patient
March 17, 2022
Took time to explain and discuss. Seemed confident and experienced, put is at ease.
May 10, 2022
Excellent physician!
May 24, 2022
Came away feeling good about the phone visit.
May 24, 2022
For Dr. Kumar - there should be an "excellent" column for each question - He sincerely cares about each patient and delivers flawless care. He never misses one detail, test, symptom. His knowledge, ...view full comment
June 3, 2022
Dr. Kumar listens to his patients & is very thorough.
July 12, 2022
Dr. Kumar is an exceptional listener and he had good suggestions and a great plan of action for the next year. I trust him with my care; that I choose to keep him as my heart provider
July 27, 2022
He is the best dr. for the heart that know.
September 21, 2022
I recommended my sister to Weston & Dr. Kumar.
October 21, 2022
Again all good.
October 21, 2022
Again all good.
September 21, 2022
I recommended my sister to Weston & Dr. Kumar.
July 27, 2022
He is the best dr. for the heart that know.
July 12, 2022
Dr. Kumar is an exceptional listener and he had good suggestions and a great plan of action for the next year. I trust him with my care; that I choose to keep him as my heart provider
June 3, 2022
Dr. Kumar listens to his patients & is very thorough.
May 24, 2022
For Dr. Kumar - there should be an "excellent" column for each question - He sincerely cares about each patient and delivers flawless care. He never misses one detail, test, symptom. His knowledge, ...view full comment
May 24, 2022
Came away feeling good about the phone visit.
May 10, 2022
Excellent physician!
March 17, 2022
Took time to explain and discuss. Seemed confident and experienced, put is at ease.
February 25, 2022
Re-establishing care with Dr. Kumar. He was and continues to be kind, insightful, culture edge in his treatment and patient. He is an excellent provider and so appreciate being back as his patient
February 11, 2022
I was treated well
February 1, 2022
All good.
January 6, 2022
Dr. Kumar is excellent!
December 30, 2021
Dr. Kumar is a great and caring doctor!
December 14, 2021
Dr. Kumar is great! Thorough!
November 17, 2021
Dr. Kumar prescribed procedures which I'm sure will give a diagnosis. After the diagnosis is made, based on the procedures, I'm sure he'll explain my health problem very well.
October 15, 2021
Very good, understandable & thorough discussion on treatment options, including me in decision making. Dr. Kumar is a very caring provider and an expert in his field.
May 4, 2021
Dr. Kumar is a very concerned health care provider. He is extremely good at answering all questions & concerns and explains things very well with drawing pictures for explanations. He seems very concerned about my well-being as well as my recovery process.
April 12, 2021
I felt he did a great job of listening and supported testing to help find out why. He also was patient with my list of questions.
March 19, 2021
Dr. Kumar is wonderful! He is always willing to take the extra time to go over something ONE more time for me to take notes for dad.
December 30, 2020
The phone call was very calming, and informative. Put me at ease. My care provider covered everything with my doctor.

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