Dr. Ronald Witteles is a Cardiologist who specializes in the treatment of patients with Heart Failure. He has particular expertise in the treatment of Amyloidosis, Sarcoidosis, and cardiac complications of cancer therapy (sometimes called "CardioOncology"). He serves as Co-Director of the Stanford Amyloid Center, one of the world's leading centers for the care of patients with amyloidosis, and serves as Co-Director of the Stanford Multidisciplinary Sarcoidosis Program. He is an Associate Editor for JACC: CardioOncology, the world's leading journal dedicated to the field of CardioOncology. Dr. Witteles has published extensively in his areas of expertise, and has won many awards for his excellence in both patient care and education.

Dr. Witteles serves as Program Director for the Stanford Internal Medicine residency program -- directly supervising the training of more than 140 physicians each year. He was recognized by Stanford in 2020 with the award for 'Program Director of the Year'. He holds board certification in Internal Medicine, Cardiovascular Disease, and Advanced Heart Failure/Transplant Cardiology.

Professional Summary

Education & Certifications
  • Board Certification: American Board of Internal Medicine, Advanced Heart Failure and Transplant Cardiology (2012)
  • Fellowship: Stanford University School of Medicine (2007) CA
  • Residency: Stanford University School of Medicine (2004) CA
  • Residency: Stanford University School of Medicine (2003) CA
  • Board Certification: American Board of Internal Medicine, Cardiovascular Disease (2007)
  • Board Certification: American Board of Internal Medicine, Internal Medicine (2003)
  • Chief Resident, Stanford University, Internal Medicine (2004)
  • Internship: Stanford University School of Medicine (2001) CA
  • M.D. with Honors, University of Chicago, Medicine (2000)
  • B.A., Northwestern University, Biology/Neuroscience (1996)
  • F.A.C.P., American College of Physicians, Internal Medicine (2010)
  • F.A.C.C., American College of Cardiology, Cardiology (2008)
  • Chief Fellow, Stanford University, Cardiovascular Medicine (2007)
  • Medical Education: University of Chicago Pritzker (2000) IL

Honors & Awards
  • Calvin Fentress Research Fellowship, University of Chicago Pritzker School of Medicine (1999)
  • Charles Dorsey Armstrong Clinical Excellence Award, Stanford University Dept. of Internal Medicine (2003)
  • Clinical Excellence Award, Stanford University Division of Cardiovascular Medicine (2006)
  • Clinical Research Award, Stanford Univ. Division of Cardiovascular Medicine (2007)
  • David W. Rytand Award for Excellence in Clinical Teaching by a Department of Medicine faculty member, Stanford University Department of Internal Medicine (2009, 2010)
  • First Author - Selected as one of 10 most important heart failure articles in 2004, Journal of the American College of Cardiology (2005)
  • First Author - Selected as one of 15 most important heart failure articles in 2007, Journal of the American College of Cardiology (2008)
  • Francis G. Ebaugh, Jr. Research Award, Stanford University Dept. of Internal Medicine (2001, 2002, 2003)
  • M.D. with Honors (highest distinction by U. of Chicago), University of Chicago Pritzker School of Medicine (2000)
  • National Associates' Research Award, American College of Physicians/American Society of Internal Medicine (2004)
  • National Research Fellowship Award, Heart Failure Society of America (2006)
  • Outstanding Clinical Teaching Award, Stanford University Dept. of Internal Medicine (2002, 2003)
  • Timothy F. Beckett, Jr. Award for Excellence in Teaching by a Medicine Fellow, Stanford Univ. Dept. of Internal Medicine (2006)

Administrative Appointments
  • Associate Director, Coronary Care Unit (CCU) (2008 - 2009)
  • Co-Director, Stanford Amyloid Center (2008 - Present)
  • Co-Director, Stanford Multidisciplinary Sarcoidosis Program (2019 - Present)
  • Program Director, Internal Medicine Residency Training Program (2011 - Present)
  • Sr. Associate Program Director, Internal Medicine Residency Training Program (2009 - 2011)


Clinical Trials

Clinical trials are research studies that evaluate a new medical approach, device, drug, or other treatment. As a Stanford Health Care patient, you may have access to the latest, advanced clinical trials.

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

Practice Locations

Amyloid Center Stanford, CA
Stanford, CA

300 Pasteur Drive , 2nd Floor, Room A260

Stanford , CA 94305

(650) 725-6186

Make An Appointment More Clinic Information » Getting Here »

Heart Transplant Program Stanford, CA
Stanford, CA

300 Pasteur Drive , 2nd Floor, Room A21

Stanford , CA 94305

(650) 723-5468

Make An Appointment More Clinic Information » Getting Here »

Advanced Heart Failure Clinic at Stanford Stanford, CA
Stanford, CA

300 Pasteur Drive , 2nd Floor, Room A260

Stanford , CA 94305

(650) 724-4942

Make An Appointment More Clinic Information » Getting Here »

Patient Ratings

(114 Ratings)

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Patient Reviews

(158 reviews)

i am very grateful that Dr Witteles is very familiar with my medical history and incorporates that information when making recommendations and changes to my medical plan and prescriptions. .
Great doctor!
Dr. Wittles showed up at the meeting with a very good understanding of my case history and situation, provide and excellent background of Amyloidosis, in general and my specific flavor in particular. He initially told me that my heart was OK, which was what I was really worried about today (he knew that I'm guessing), and then asked some questions about my current state, and then provided and excellent and detailed summary of my medical voyage so far, and what the next steps would be. His summary wove in events that occurred within the Mercy Medical system as well as Stanford, and so his notes are the best and most complete description of all my recent medical tests, results, procedures, and symptoms, that I have. We agreed on next steps, and I feel that I very clearly understand my medical situation. I'd like to thank Dr. Witteles for his thorough preparation, and organization during the meeting, as well as his flexibility in answering my questions. This was an excellent visit, and not just because I got good news. The above things would have been even more important to me if I was getting bad news. So in summary it was a great visit, which I am really thankful for.
Dr. Witteles is very personal, knowledgeable, and easy to talk with. I really like him as my Cardiologist.
Great appointment. He is always kind, helpful and informative. Great physician!
I appreciated the opportunity to have the visit virtually.
Very good visit and productive.
Great doctor, nice and talked with him about issues.
An excellent, empathetic doctor.
Echocardiogram technician was friendly and thorough
Stanford Medicine is world-class
Excellent doctor. Very friendly, seems to truly care about me, but always very professional.
I thought Ron was well prepared and knowledgeable about my particular issues around the medical diagnosis I am dealing with. He also made me aware of upcoming clinical trials that I might be able to participate in and benefit from. There also was a nice discussion about medication changes, and what benefit they may yield, or not yield.
Extremely knowledgeable and very helpful.
He was great. Thorough and informative. I learned a lot!
I appreciate that Dr Witless is very familiar with my case. That allows us to discuss differences in my health without having to verbally recap my medical history and what had been prescribed during the last time period. We ate able to focus on current situation and new changes. He provides my care from an informed position which allows me to have great confidence in his care.
Dr. Witteles is an excellent physician for my husband's heart condition.
I’m very pleased with the quality of care I receive from Dr. Witteles.
Outstanding physician
Terrific session based on Dr Witteles’ expertise, clear analysis and communication.
answered/addressed my questions and concerns, did not seem rushed, had checked my medical record in Epic and had it available so we could review together
Dr Witteles is an excellent physician.
Excellent care
He is a fantastic doctor who knows his feel very well. I'm very comfortable when I consult with him, with his assessment of my situation, and with the information that he gives me.
The parking is terrible but the staff is terrific.
He is a careful, caring doctor.
Was good
Excellent Staff and care
Courtesy and efficient
He is an outstanding cardiologist!
Great Doctor
Loved Dr Witteles.
Witteles is phenomenal
Wonderful Doctor. I think the video visit was great but next appointment i would like to see in person
Superb professional attention from an M.D. who obviously knows his field in depth and up to date
On-task, communicative, responsive, timely and efficient
Dr Witteles is very knowledgeable in his field, listens carefully to my questions and explaines everything in an easy to understand way. His entire team is the same way. I feel cared for very well.
Dr Witteles and his staff are outstanding! Their level of patient care is second to none!
Interested and very knowledgeable and caring physician.
Very thorough.
He knows his area of medicine unbelievably well and, although my diagnosis is not curable, made me feel hopeful for the future.
Dr. Witteles was professional and very clear in his explanations of the process I should expect.
He appears to be an excellent and personable doctor.
Best Doctor ever
received personalized attention from all providers
He is kind, knowledgeable, and very easy to talk with.
Comprehensive care. Feel well looked after. Thanks
An outstanding cardiologist. Answers all my questions and genuinely cares about his patients.
Professional, thorough, polite, and friendly. I left with no unanswered questions.
Brilliant doctor, very clear and helpful.
Greatest doctor i ever met
The greatest
Thorough, knowledgeable and a pleasure to work with.
Very professional and helpful team. Love them and recommend without reservation. Thanks!
Excellent physician and a very kind person!
I hope we never have to because of the nature of the condition but if we knew someone with similar symptoms we wouldn't hesitate to refer.
He is an excellent doctor and extremely knowledgeable about my amyloidosis.
He was great.
Great doctor, I had no trouble understanding what we were discussing
Dr. Witteles and his team have always been top notch. I appreciate the attention they give me each time I connect with them.
Great doctor !!!
He was very patient and a good listener. He explained everything clearly. I felt at ease speaking to him about my medical problems.In addition, Trish, who works in the office, was very good at paving the way for a successful video conference.
I am extremely pleased with the care I receive from Dr. Witteles, and from all of his assistants.
I have been seeing him for a few years and always feel well looked after. Don't feel I could be in better hands,
Very professional and covers everything about my condition in terms I can understand. You are lucky to have Dr Witteles and his staff!
Dr. Wireless had a good understanding of my disease, data and concerns. He addressed everything with knowledge and sincerity.
Dr. Witteles is the greatest.
Dr. Witteles, the Stanford Fellow and nurse have all been very good.
Dr. Witteles always speaks clearly, listens attentively to questions to include me and my spouse in important decisions.
They listen, advise and show care.
Dr. Witteles is excellent. Stanford is fortunate to have such an outstanding physician on its staff.
I drive over 100 miles to see Dr. Wittles and or his fellow. totally worth it.
Give me confidence.
Dr Witteles and staff are AWESOME!
I wish I was cared for by Dr. Witteles from the onset. About a year ago. He has the experience, knowledge, and care for my case. I feel so fortunate to have him.
Dr. Witteles is an outstanding cardiologist and takes good care of me.
Best doctor in the world bar none.
Dr. Witteles is Fantastic
Dr. Witteles is an extremely professional and kind man. He is always clear about my condition and never leaves me w/questions.
Dr. Witteles saved my life. And has given me a good as can be quality of life. I am a stage 4 congestive heart failure patient. Thanks!
I am privileged to have Dr. Witteles as my physician. He combines expertise with kindness and compassion.
Great doctor!!!
The Fellow who first spoke with me was engaging and seemed to have time to hear my concerns. The physician I was scheduled to see was quite obviously in a hurry, gave me a cursory evaluation, stood and never sat, changed one medication and sent me on my way. I completed a multi-part form on which I listed numerous symptoms and conditions, none of which were addressed or even acknowledged. I drove a combined 7 hours, waited for another and was briskly dismissed in a matter of just a few minutes. I complained of shortness of breath and pulmonary edema and was hospitalized for two days, AFTER Dr. Witteles assessed me and sent me away. I will never see that doctor again and am reluctant to divulge such information to another physician in this manner again.
keeps us update on this disease and works with our cardiologist in Walnut Creed
Dr. Witteles is outstanding and is consistently helpful & informative.
I had an excellent experience with Dr. Witteles. He is expert in his care and patient and kind.
I have total confidence in Dr. Witteles.
My doctor is specialized, so don't know anyone else in my position. However, if I did I would highly recommend him.
Dr. Witteles is kind, patient, and caring, thank you!!!
My wife and I were very impressed with Dr. Witteles. He wasn't rushed and he gave us all the time we needed to ask questions and explore options.
Dr. Witteles was extremely patient with me. Explained all options clearly.
Excellent care providers!
Dr. Witteles is always very clear in his communication. Very pleasant experience.
Dr. Witteles is wonderful, engaging and always helpful.
outstanding physician
Dr. Witteles is outstanding and answered all my questions clearly and completely.
Dr. Witteles and Dr. Kawana spent more than an hour explaining my condition, treatment options and follow up plan. Very professional.
caring and competent physcian
Dr. Witteles is a superb physician and I am so glad I found him, even though I live in Seattle, WA.
Dr. Witteles saved my life and I am forever in his debt. He is a bench mark in regard to what a patient needs in a specialist.
Always take time needed, especially since I drive over 3 hours.
Dr. Witteles is awesome as is his team!
dr ron is the bomb
Dr. Witteles answered every question thoroughly. I was so impressed by the fact that he really wanted me to understand & a very complicated diagnosis. I sing his praises!
I have a very serious heart condition. For the first time since contacting this condition, the doctors I talked to through their care and professionalism, really gave me a sense of hope!
I am extremely impressed with the quality of service that I am receiving at Stanford Medical Center (Heart Clinic). Thank you!!
Wonderful doctor. Very caring and his RN Emily is wonderful too. She returns my emails or phone calls quickly, sensitive to my needs and concerns.
Very good!
Dr. Witteles is very knowledgeable, caring & personable. I would highly recommend him to anyone.
I am so fortunate to be a patient of Dr. Witteles.
Dr. Witteles and his nursing staff have been exceptional in the care they provide and the time they take to listen and give me options of treatment specific to my case and make recommendation. All positive so far.
We also love Dr. Witteles!
Exam was very thorough. Discussions were excellent.
Dr. Witteles and his staff were excellent, clear, and took the time to hear and answer my concerns about a difficult turn in my course of treatment.
Dr. Witteles was excellent - I was very impressed!
He is the best!
Dr. Wittelas is very patient and excellent at going into details when asked. I feel very confident being in his care.
Dr. Witteles is great.
If I had any problem with this care provider, I would get another.
Always willing to spend the time I need, if there is something pressing.
Dr. Witteles had so much new and good information that I would have loved to have had more time with him. I understand why that likely wasn't possible.
Both Marie, and Dr. Witteles, were outstanding with the time they spent with us, their explanations and willingness to answer all our questions.
Dr. Witteles was able to explain complex medical issues in terms that a layman can easily understand.
Ms. Kimberly Sangalli (PA) physician assistant is a very compassionate and caring person. HER FOLLOW=UP CARE IS OUTSTANDING. My dr. spent enough time with me to explain my problem. My dr. & his PA definitely worth recommending her care to others.
I felt like Dr. Witteles gave me all the time I needed to understand my condition and treatment plan.
Dr. Witteles saved my life. He has been the bedrock of my ongoing care and recovery. I have all the confidence in the world in his abilities and his supporting staff. The care at Stanford is world renowned because of doctors such as Dr. Witteles and Dr. Shirley Park. I will continue to sing the praises of Stanford medical to all who will listen.
Dr. Witteles was very clear & informative. Answered all my questions on a difficult topic.
always very carrying and thoughfull
Dr. Witteles is exceptional and I feel fortunate to have him available to me.
I arrived before the scheduled time admitting clerk - courteous, somebody came out waiting room, informed us that Dr. Witteles will be with me shortly. Shortly after, I was called in. Vitals & immediately, the nurse came, discussed problem. Then Dr. Witteles came, & satisfactory explain to me regarding my cardiac consultation - very satisfactorily.
Care provider was very professional knowledgeable/busy.
Very pleased with this physician. Extremely knowledgeable about my rare condition, excellent communicator, caring, and patient.
very good
Dr. Witteles is great. Very assecesable, spend the required amount of time with me, very friendly
Always listen with great interest on anything related to my health. The discussion goes highly educational on my part.
Thanks Dr. Witteles and Dr. Obrian for taking such good care of me!! My pacemaker working great - thank you Dr. Wang and nurses in surgery for making it go so smooth.
I am sure the Stanford Amloyd Center and staff are the best in the world. Dr. Wittles and Trish are wonderful. I am very confident in their abilities.
Very good experience & worth recommending to other patients. I LIKE MY DR.
Very good assistance over the phone.
My doctors are always very helpful and explain every aspect of my conditions and med!
As stated previously, working with Kim S. is great. She makes a good team with Dr. W. I have confidence that between the two of them, they know me and my issues.
I ask a lot of questions, they were all answered.
All good!
Great and compassionate shows sincere concern.
Dr. Witteles clearly outlined the ways systemic sclerosis can affect the heart. He then told me that I haven't been affected in some of those ways. I truly appreciated hearing that. If the day comes that I have true cardiomyopathy from my disease, I know he'll take expert care of me.
I have the utmost confidence in Dr. Witteles.
Dr. Witteles was easy to talk to, informative and positive. Good experience.
My best experience to date.
Dr. Witteles is an expert in explaining the disease and gave me & my family adequate time.

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