Dr. Marco Perez's research goal is to better understand the fundamental causes of cardiovascular disease through the study of genetics and epidemiology. His group studies the genetic variations and environmental exposures that are associated with conditions such as atrial fibrillation and heart failure. He has led the studies of atrial fibrillation in Women's Health Initiative, one of the largest nation-wide population-based cohorts. He is currently conducting a large study monitoring for silent or asymptomatic atrial fibrillation in women from the WHI randomized to exercise intervention, and was co-PI of the Apple Heart Study, a clinical trial that validated the ability of a smartwatch to detect atrial fibrillation. He is now PI of the Clinical Coordinating Center at Stanford for the REACT-AF which is a clinical trial to evaluate efficacy and safety of a "pill-in-the pocket" approach to anticoagulation for AF using a smartwatch. He is interested in understanding the paradox that atrial fibrillation is less common in African Americans and Hispanics, despite a greater burden of risk factors such as hypertension. As director of the Stanford Inherited Arrhythmia Clinic, he evaluates families with rare inherited arrhythmias associated with sudden death such as Long QT and Brugada Syndromes and explores their links with novel genes. He also studies the genetic causes of very early onset atrial fibrillation. He also studies how best to use the electrocardiogram and imaging modalities using Machine Learning techniques to identify patients at risk for cardiovascular disease. Dr. Perez receives funding from the NIH/NHLBI, Apple Inc., Janssen and the Colson Foundation.

Professional Summary

Education & Certifications
  • Board Certification: American Board of Internal Medicine, Clinical Cardiac Electrophysiology (2023)
  • Fellowship: Stanford University Medical Center (2010) CA
  • Fellowship: Stanford University School of Medicine (2007) CA
  • Residency: Massachusetts General Hospital (2004) MA
  • Internship: Massachusetts General Hospital (2002) MA
  • Medical Education: Harvard University Health Services (2001) MA
  • Fellowship, Stanford, Electrophysiology (2010)
  • Fellowship, Stanford, Cardiology (2007)
  • Residency, Massachusetts General Hospital, Internal Medicine (2004)

Awards & Memberships
  • Dean's Fellow Research Award, Stanford University (2006-2008)
  • Department of Medicine Teaching Award, Stanford University (2014)
  • Fellow to Faculty Award, American Heart Association (2011-2016)
  • Finalist, FGTB Young Investigator Award, American Heart Association (2013)
  • Harold Amos Faculty Development Award, Robert Wood Johnson Foundation (2012-2016)
  • Loan Repayment Program Award, NIH (2010-2014)
  • National Research Service Award, NIH (2006-2008)
  • R01 Research Project Grant (1R01HL136390-01 ), NIH/NHLBI (2017-2022)
  • SPARK Award, Stanford University (2014-2015)

Administrative Appointments
  • Director, Stanford Inherited Cardiac Arrhythmia Clinic (2013 - Present)
  • Director, Stanford Cardiac Electrocardiography Laboratory (2017 - Present)


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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Hypertrophic Cardiomyopathy Center Stanford, CA
Stanford, CA

300 Pasteur Drive , 2nd Floor, Room A260

Stanford , CA 94305

(650) 736-7878

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Stanford Sports Cardiology Stanford, CA
Stanford, CA

300 Pasteur Drive , 2nd Floor, Room A260

Stanford , CA 94305

(650) 736-7878

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Center for Inherited Cardiovascular Disease Stanford, CA
Stanford, CA

300 Pasteur Drive, Heart Clinic 1, Clinic A21

Stanford , CA 94305

(650) 736-7878

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Patient Ratings

(10 Ratings)

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Explanations the care provider gave you about your problem or condition
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Care provider's efforts to include you in decisions about your treatment
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The Patients Ratings and comments are gathered from our Patient Satisfaction Survey and displayed in their entirety.

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Patient Reviews

(80 reviews)

I can say that I was extremely pleased with my video visit with Dr. Marco Perez. Since the start of our conversation, I could see that he was a very skilled professional that was very knowledgeable in the field of cardiovascular medicine. Before the start of our video, he had reviewed all my medical history and explained to me very clearly the purpose of our visit and the various options available for treating my atrial fibrillation. He treated me very well, with respect and compassion, and answered all my questions and concerns in a way that I could understand without leaving any doubts. Great experience!
Marco Perez answered all my questions about the upcoming procedure, and assured me that this was the best possible solution to my afib.
Very professional, knowledgable and reassuring. Explained everything well and answered all my questions patiently.
He. And the rest of his team are great!
Dr. Perez took the time to listen to my concerns and was very thorough in explaining things. I didn’t feel rushed. He showed that he cared for me as a patient.
Personable, respectful, thorough, kind and efficient.
Look forward to an in person meeting.
Thank you!
He was very informative and pleasant. I trust that his knowledge is accurate and it allows me to make informative decisions about my health.
Dr. Perez is very thorough & asks if there was any concerns. Thank you Dr. Perez & the staff at the Cardiology department.
Dr Perez is very friendly and caring.
He is excellent.
Easy to talk to. Answered all my questions and was very informative.
Very clear explanations
Excellent patient manner. Seemed to be prepared and was straight-forward about his views and the next steps.
Excellent doctor
He was looking down most of the time. Would be good to figure out his video setup so that it looks more like he is looking at me.
Great Doctor. Well spoken and knowledgeable.
Dr. Perez has been very helpful and a great doctor with my situation. Between the unknown of procedures, symptoms, & all the medical conditions that arise with Cardiology, Dr.Perez has given me the utmost importance in my case. I want to Thank him, his Staff, Surgery staff, & everyone at Stanford for the excellent care & treatment. Thank you Dr.Perez, I truly am grateful for everything!
Stellar care.
I know I am in good hands. Thank you
I always enjoy my appointments with Dr. Perez. He is a wonderful doctor.
Dr. Perez was very thorough asking questions about my condition and provided detailed answers to all my questions. I really recommend Dr. Perez as a great specialist.
All good - thank you
Dr Perez has been my EP for some time. Dr Perez takes time and explains everything fully and answers all my questions
Dr. Perez is a very caring doctor that has the patients best interests. Always going beyond. Thanks!
Very nice guy and he seems like he genuinely cares about his patients. Would definitely recommend him to others.
Thank you
He was very attentive and answered all my questions.
I would like to say that I am so very grateful to be under the care of Dr. Marco Perez. He is such a wonderful man, and physician! I could not feel better taken care of, and more cared about by a Dr.. Stanford and his patients are incredibly lucky to have him. As am I. I hope that these sentiments are read someone passes them on to him. Joshua VaMetre
Dr. Perez and his team were very helpful and knowledgeable. Very impressed.
Very personible, very clear with information, fully explained the procedure and alternative treatments. Very kind, liked him very much.
Good rapport. Got me relaxed so that we could talk about my healthcare needs. A lot of medicine is really listening before diagnosis...he seems to be good at that.
Communication was excellent! Listened well to my concerns, explained things in detail, and maintained professionalism. Appeared genuinely concerned about my care.
Affable, professional, listened, informed about my case, offered clear advice
He is very good about answering my questions and listening to my concerns.
Excellent video call manner. Very clear, very kind and answered all my questions.
Dr Perez is the best
He is amazing! Brilliant, patient, and kind.
Very happy with willingness to explain and answer. Never felt like we were rushed. He took the time to make sure we understood our options.
Dr Perez is fantastic. Every appt I feel like he listens and provides his expertise in helping me improve my quality of life
pleasant, informative, inspires confidence.
Very pleased and impressed by our first visit!
I am so happy to have Dr. Perez as my cardiologist. He is very kind and thorough, and has amazing nurses. I love working with Colleen and Allysonne- they are the best!
Very thorough. He listened to my questions and concerns and addressed them thoughtfully.
Everybody did a great job, but especially I would like to mention his Colleen Caleshu and her team.
Dr. Marco Perez is one of the best physicians I've experienced.
Healthcare all around the world was charged drastically over the last 20 years. People became care providers because they had a passion to help others. As a society we do not take good care of ourselves. The need for good, compassionate healthcare providers is at an all time high but there are to many people pursuing healthcare for a career and not because they have a calling. I live in a small town just under 100,000 people and most of the physicians in Chico, CA treat you like cattle than a person. It's because of these experiences many people, like me, do not seek out answers/care to they're HC problems. I've only had 3 appt. @ Stanford and each time I am there I am treated with dignity and respect. To value me, like this, allows me to relax and trust the system Stanford has in place. Keep it up!
Amazing!!! Hard to describe the level of intelligence, kindness and relatability.
Dr. Perez is an excellent physician. I trust him with my care.
Doctor was excellent and spent plenty of time describing my options for future care.
Dr. Perez is outstanding!
Dr. Perez listened to my unusual side effects to medication/Toprol XL. He was considerate and obliging to my request to try to get off med & try a heart monitor (Zio monitor).
Dr. Perez always spends plenty of time with us. Never hurries us.
Dr. Perez is a "10"!
Loved Dr. Perez and his team - I felt very comfortable, and like they truly cared.
Dr. Perez was the very best.
I've the highest respect for the care I've been given by Dr. Marco Perez & his NP Allysone Smith. They are both highly skilled, very friendly & caring, and I can't say enough good about them.
Excellent beyond expectation.
Everything was great but I was told I would get a call to go over lab results and I'm still waiting I send an e-mail and have not heard back. I have the results on "my health" but I don't know or understand what it all means.
Dr. Perez is one of the best, most competent, knowledgeable doctors I have ever visited. He has given me excellent care these last close to 2 yrs. I will miss him!
Good experience - doctor was great! Just took too long to get to him as a new pt.
always very helpful
Kate was wonderful again. She carefully explained my condition to me, my progression and further treatment and visits in the future. She really took the time to address my concerns.
I get the best care from Dr. Perez - I call him my miracle worker. He & his staff cured my arrythmia. My heart now beats at regularly.
Dr. Perez has helped me through my ICD process and getting used to it. And answers my questions regarding it.
Love Dr. Perez & his team. Alyson is great.
Dr Perez came to see me and talk to me a number of times when I was in the hospital for a week in July. he is a very compassionate person.
Great professional. Considerate and listens
spent an hour with my husband and I answering questionsvery compassionate
Very impressed with Dr. Perez - - he knew my health history - - it was a 1st of documents to review.
Dr. was very kind and understanding.
Every person I know that wonders how I am I tell Stanford Hosp. is the very best hosp. I have ever been too.
Dr. Perez is also very professional & courteous.
Excellent professional, friendly, knowledgeable, care provider.
Dr. Marco & nurse Alison are very caring and compassionate. Alison is amazing in her quick response times.
Never write on comments BUT Doc Perez and his staff is worth it!
Dr. Perez was excellent in categories.
Good experience overall.

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