Dr. John Clarke recently joined the Gastroenterology & Hepatology Division at Stanford University as Director of the Esophageal Program. He previously spent 17 years in Baltimore, including 9 years on the faculty at Johns Hopkins University where he was an Associate Professor and at various times Director of Esophageal Motility, Director of Gastrointestinal Motility, Clinical Director of the Johns Hopkins Center for Neurogastroenterology, and Clinical Director of the Gastroenterology & Hepatology Division at Johns Hopkins Bayview Medical Center.

His career has combined research, education and clinical care. His clinical areas of expertise include achalasia, dysphagia, eosinophilic esophagitis, esophageal dysmotility, gastroesophageal reflux disease, gastroparesis, GI-manifestations of scleroderma and GI dysmotility. While at Johns Hopkins University, he was inducted into The Miller-Coulson Academy for Clinical Excellence, an institutional honor society for master clinicians at the time limited to 50 members across the entire university.

From an education standpoint, he has lectured in over a dozen countries, authored over 25 textbook chapters and serves on the educational affairs committee of the American College of Gastroenterology. He has also won several major teaching awards, including The Johns Hopkins University Alumni Association Award for Excellence in Teaching, given to one faculty member per year in the entire School of Medicine.

His research has focused on optimization and characterization of diagnostic studies to evaluate motility disorders, as well the relationship between therapeutic endoscopic techniques and treatment of motility disorders. He was an investigator on the NIH Gastroparesis Consortium and is also a former recipient of the AGA Don Castell Award.

Professional Summary

Education & Certifications
  • Board Certification: American Board of Internal Medicine, Gastroenterology (2007)
  • Fellowship: Johns Hopkins University Dept of Gastroenterology (2007) MD
  • Board Certification: American Board of Internal Medicine, Internal Medicine (2002)
  • Residency: Johns Hopkins Hospital Internal Medicine Residency (2002) MD
  • Medical Education: Columbia University College of Physicians and Surgeons (1999) NY

Honors & Awards
  • Award for Excellence in Teaching, John Hopkins University Alumni Association (2015)

  • Member, Scientific advisory board, Teva (2015 - Present)
  • Member, Scientific advisory board, ProStrakan (2012 - Present)

Administrative Appointments
  • Director, Esophageal Program, Stanford Medicine (2016 - Present)


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

Digestive Health Center in Redwood City Redwood City, CA
Redwood City, CA

420 Broadway Street, Pavilion D, 2nd Floor

Redwood City , CA 94063

(650) 736-5555

Make An Appointment More Clinic Information » Getting Here »

Esophagus Center Redwood City, CA
Redwood City, CA

420 Broadway Street, Pavilion D, 2nd Floor

Redwood City , CA 94063

(650) 736-5555

Make An Appointment More Clinic Information » Getting Here »

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 »

General Endoscopy Redwood City, CA
Redwood City, CA

420 Broadway Street, Pavilion D, 2nd Floor

Redwood City , CA 94063

(650) 736-5555

Make An Appointment More Clinic Information » Getting Here »

Patient Ratings

(124 Ratings)

Overall Rating

View Ratings by Category

Friendliness/courtesy of the care provider
Explanations the care provider gave you about your problem or condition
Concern the care provider showed for your questions or worries
Care provider's efforts to include you in decisions about your care
Care provider's efforts to include you in decisions about your treatment
Recommended to others
Likelihood of your recommending this care provider to others
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

(403 reviews)

Excellent doctor, Great communication Most importantly he was optimistic that I will be cured Which put me at ease And provided multiple options to reduce my discomfort
He’s wonderful, very easy to talk to and answers questions well.
Great doctor in all aspects!!’
John Clarke is clearly an expert, and he takes good care of the patients. He was very attentive and kind. He explained everything very clearly, combining his observations with my symptoms and outlining all possible options.
Doctor Clarke is an amazing, knowledgeable and caring physician.
Dr. John Clarke is an outstanding doctor. He is thoughtful and kind as well as thorough in his examinations. It is always a pleasure to visit with him and gain his insights.
John Clarke is a very fine doctor who cares about his patient's needs. He is thoughtful and asks the right questions.
Dr Clarke is great. His "bed side" manner is attentive and caring. I feel that he truly is concerned about my well being as a patient.
Great visit
It has been huge, positive game-changer to receive care from Dr John Clarke.
He is very thoughtful and thorough!
Dr John Clarke is very professional and excellent ðŸ‘
Dr Clark listens and works to helped find solutions...the video visit saves me time and money, and just as high quality...thank you!
Dr. Clarke is the best! I had previously seen several different GI doctors, but none had the knowledge and concern for their patient that Dr. Clarke has. I would recommend him to anyone with GI problems. In fact I already have and she feels the same as I do.
Extremely professional and friendly....Great Bedside manners...All aspects of my condition were covered and explained in detail.
He is awesome.
Dr Clark has been my doctor for over five years and I’m extremely satisfied with his care and the care of his staff. He’s an exceptional care provider, very competent and knowledgeable in his field..
I just wrote a google review on Dr Clarke and what an exemplary doctor I think he is. He is astute, patient, diligent and organized at following up regularly to see my care doesn’t slip sideways for any reason, kind and empathetic, and exceptionally skilled at communication. He is the perfect doctor for me, at least.
Seems patient, caring, and doesn't talk over you.
Such a great listener, so knowledgeable. I feel so great to have him as my doctor.
Thank you Dr. Clarke for your excellent care.
Dr. Clarke's colleague was detailed in assessing background and made excellent suggestions on post visit actions. Dr. Clarke joined him and confirmed the ideas. Overall I felt as if my problem was thoroughly addressed in a thoughtful way.
Thoroughly answered questions. Didn't rush through the appointment. Listened to my responses.
Excellent MD. Please make sure he gets everything he needs as it is critical, if you wish to retain patients like me, that you provide to MDs like this WHATEVER THEY TELL YOU THEY NEED - whether that is parental leave and quantity of it or whatever. Cut your profit and need for fancy surroundings vs. raising prices on care and squeezing actual nurses and MDs.
Dr Clark was very understanding listen to my health issue offered additional health care
Dr. Clarke is great! He is very nice and knowledgeable about the latest practices and research, explains things well, and is always receptive to my wishes about my care. Also, I appreciate how responsive and helpful his office is when I contact them with questions or concerns via the portal.
Showed genuine concern
Always very happy with visits.
Dr. Clarke is very knowledgeable, listens well, and takes my concerns seriously. I feel like my cares is in good hands with him.
He is one of my favorite doctors! He is very present. He is a good listener. He's got a kind demeanor. He answers my questions in a direct manner. And one of his best qualities is that he talks to me as a more or less equal and believes and respects my input (including research articles I sometimes send). I see a number of specialists at Stanford, and often feel like I am gaslit with 'active listening' without any direct response. This makes me feel like I have to do a lot of research about my conditions as I am unlikely to get in-depth answers to many of my queries. This especially applies to new drugs or treatments. I have to bring them up because otherwise they are never mentioned.
Dr. Clarke is an excellent doctor who is very knowledgeable about scleroderma.
Very knowledgeable about my issues, very kind, very helpsful. He explained his reasoning behind his decisions.
I have seen Dr Clark on several occasions since 2015. He’s an amazing practitioner. He’s through in his explanations of proposed treatment plans, and lets me know the “why†for changing medications and proposing solutions to my ongoing issues. He always takes time to address any concerns, reservations or questions I have.
Dr. Clarke clearly explained my testing and recommended a plan of care that I was in agreement with. He listened to me and I felt like I mattered as a patient.
All positive thoughts. Good listener
Dr Clarke spent time reviewing my health history and he is exceptionally knowledgeable about my condition(s).
It was an excellent meeting.
Can't say enough good things about Dr. Clarke. He is a phenomenal healthcare provider.
Dr Clarke is awesome ðŸ‘
Dr Clarke is very professional, knowledgeable, explained very well options and detailed oriented. I really appreciated his care.
Very engaged and helpful
Very pleasant to talk with; clearly described options to deal with my condition and related symptoms.
He’s the BEST. Always open and support to any lifestyle changes to improve my functional digestion symptoms. I can count on Dr. Clark being up to date on current research and honest with his thoughts on research validity. He is an asset the digestive health department.
Dr. Clarke had very good news about avoiding the procedures until after the transplant. He was very pleasant and user-friendly. Monica was also very friendly and took time to explain several questions. Thanks again.
Fantastic --- knowledgeable, up-to-date, professional, listened to my questions, sincere and trusting, shared options and steps clearly-- would highly recommend
Very understanding and discusses options with you
Excellent physician
Excellent physician. Listens well, has personality! Answered all my questions.
I'm always completely pleased with my appointments with Dr. Clarke. He listens, he focuses on the patient during the entire consultation, he explains things well and in detail, and he is patient. I always feel greatly cared for! Great doctor, a rare type!!
Very professional and kind doctor.
I’m very pleased with his care He explained options and take his time to answer my questions Very knowledgeable and has empathy for the patient Thanks Dr Clarke
Outstanding physician and human being
Dr. John Clarke is an excellent physician, who has the interest of his patients at his heart. He listens to you well and tries to explain everything well.
This was my second virtual visit since my last upper endoscopy 4 months back. Dr. Clarke carried out the procedure himself to evaluate my GERD condition most accurately. His knowledge of GI issues and attention to my needs is unparalleled. Thank you.
I believe he genuinely cared about the problems I was having regarding my health. He listened to me and provided options for procedures that we’re available and what followed next. I look forward to meeting him in person.
Excellent listener, great advice, offered several options for healthcare, open to suggestions. Uses layman terms.
I have know Dr Clarke for several years ,now and always felt he was honest, kind and open to the truth. His professionalism is so appreciated .I feel very fortunate to have him on my team :) Thanks DR Clarke!
Excellent, knowledgeable and very approachable doctor. One of the best.
He listened very carefully showed compassion and interest in my issues and explained everything very well. I was extremely pleased with the visit with him.
Dr. Clarke combines the best of professionalism, kindness, and understanding. He listens and responds accordingly.
Dr. Clarke is both attentive and kind.
My visit was fruitfull, staff was courteous, Dr. J.BClark was very clear, answered all my questions and explained all my options
Dr John Clarke is very pleasant, respectful, listens.
Dr. Clarke is always professional, personable, informative and he fosters easy communication. He is attentive and kind and I feel I’m getting the best care. I highly value Dr. Clarke’s expertise and am happy to be his patient.
He is very kind, compassionate and willing to take patients seriously. He treats them with respect. He is willing to go the "extra mile" to help them resolve their issues. I am very grateful to him.
Listen to my issues and provided quality observations and treatment options that fit my issues. Did not force options that other providers tend to do.
Very nice doctor
Dr Clarke Was very understanding, kind, helpful with all my GI issues, took the time to listen to me explain about my health Concerns
Great doctor. Listens and explains everything extremely well.
I've never had a doctor as thorough as John O'Brien Clarke. He explained the issues with my throat with me and my wife. He detailed how long the procedure and recovery would take. He also worked out a time for the procedure that fit his and our schedules!
I think he is a compassionate, terrific physician. He has helped me so very very much in my swallowing problem. I am almost completely cured thanks to Dr Clarke.
He is an excellent communicator and is very thorough in assessing my condition.
Everything was great. I felt that he has a genuine interest in my health and is taking steps to make my life as comfortable as possible with the chronic conditions that I have.
He is excellent.
Dr. Clarke and his P.A., Makayla have gone above and beyond. Their expertise and service have been so very appreciated. From the phone calls for appointments to in office procedures, that staff has been amazing. In a day when getting into the doctor can take up to 3 months where I live, having Stanford health and specifically Dr. Clarke be so available when we have needed has been an absolute blessing and we cannot express enough how very grateful we are.
Was a great experience. He was knowledgeable, a good listener, calm and helpful.
Dr. Clarke Is an excellent doctor that I have full confidence in. There are many qualities I value in Dr Clarke. To name a few I feel like he really listens when I describe what issues or symptoms I'm having. I feel like he includes me in the process of making a treatment plan to make sure I'm comfortable with it. He's also very knowledgeable about his specialty. He actively seeks new procedures and technology that can help me and lets me know about them. I find him very easy to talk to as he is warm and welcoming and friendly. I would highly recommend him to anyone and again am so grateful that I have him caring for me in an area of my health that I have a lot of issues going on.
Dr Clarke was informed with my medical history and was so kind and empathetic.
Dr. John Clarke is an excellent Gastrointrologist - he is professional, kind, caring, listens well and offers good advise. He takes time to explain things and just a great doctor. I give Dr. Clarke five stars for the best Gastrointrologist!
Seems like a great doctor. Listens. Asks useful questions. Communicates effectively. Personable. The kind of guy you want to buy a beer and see a Sharks game with.
He was knowledgeable and explained process and procedures very well.
After many years of futile efforts to control my GERD, I have realized that I should seek professional help. I switched my GI care to Dr. Clarke six months ago. He performed an upper endoscopy with a 96-hour wireless pH probe. Remarkably, he performed the test himself from end to end to get a better appreciation of my condition. The test results pointed to my regimen (high pH diet, 20MG omeprazole every other day, and active exercise routine) as the prime culprit for my GERD symptom flare-ups. I have made necessary adjustments to my regimen (switching to 20MG omeprazole daily and easing the exercise routine) and achieved marked improvement in my life quality. The follow-up endoscopy test performed by Dr. Clarke confirmed that the previously seen reflux esophagitis had entirely healed, but a moderate hiatal hernia persisted and biopsied tissues revealed many years of abuse. In a separate video conference, Dr. Clarke reviewed the issues with me and provided specific recommendations. Dr. Clarke’s methodical and thorough approach has been a breath of fresh air. I profusely thank Dr. Clarke and his staff for their dedication to high-quality GI care. It would be very remiss of me not to give special plaudits to Dr. Clarke’s nurse Lily for very fruitful communications.
Very easy to understand and was able to answer my questions.
Dr. Clarke is super nice! I’m very grateful for Dr. Clarke as my GI doctor. He’s knowledgeable and gentle. Thank you Dr. Clarke!!!
Dr Clarke is an exceptional Doctor and likable person. I have full confidence in him and his great team.
Very nice, he explained things very well
Professional courteous excellent healthcare
Dr. Clarke was very thorough and reasonable. He took his time and looked over some of my test results which helped me to understand what they meant. I appreciated his approach to my problem and feel so much more at ease having had a consult with him
Dr Clarke is very personable and listens/addresses your concerns throughly. He puts you at ease right away. He is clear in his communication and recommendations.
Great guy, personable and explained things so I could understand
Dr. Clarke is a very kind human being and a doctor. I hope he lives a long and healthy life so he can serve many, many patients who are suffering.
I had a great video appointment with Dr John Clarke. My appointment also included one of Dr Clarks’ colleagues. The appointment was collaborative and not only were all my questions answered, but Dr Clark treated me with respect, and was empathetic and made me feel cared for. He listened to any concerns that I had, explained everything clearly so both my husband I understood and was extremely helpful! Dr Clarke has a great bedside manner in which he was very personable and a great listener who went above and beyond what I expected. The very next day, which was a Saturday, I received both an email and a text message that stated I had a procedure scheduled and to contact the number provided for all the information! I couldn’t believe it. I was so over joyed. Couldn’t be happier. Thank you Dr John Clark and Staff.
Very sweet, and I am confident that he can help me. Thank you so much!
My visit with Dr. Clarke went exceptionally well. I would definitely recommend him.
He Listens and explains when I ask a question. I always feel I’m in good hands with Dr Clarke
Wonderful professional
Dr Clark is a supurb physician.. It is ibvuious he cares about his patient, knows his field, and can communicate with hid patient in language the patient on the patient level.. I have been lucky to have hadm excellent doctors throughout my adult life and Dr Clark is one of the best of the best.
I had a very good video visit with Dr. Clarke. He was prepared, thorough, clear, and considerate, an excellent doctor.
Dr Clarke listens to what I say and responds to my concerns.
Thank you for your excellent care
He is a great Doctor treated me very well and was really nice and patient with me.
efficient and well done on every level
Dr. Clarke is the most compassionate, thoughtful and expert medical practitioner I've ever encountered. Thank you!
I was very pleased with Dr. Clarke. He took the time to evaluate me and my issue. He did not rush, was thorough and very caring. I was very comfortable talking to him. He discussed the results of my endoscopy, the medications I am taking and options that are available.
Doctor and PA very knowledgeable in their field of practice.
Great doctor, kind and understanding
Excellent provider!
Possesses knowledge about digestive disorders and what directions for proceeding with related healthcare.
Listener, patient, have diffetent options and great at all
Dr Clarke has been great! Incredibly helpful and insightful. I appreciate all of his advice/feedback/concern.
He is an excellent doctor, compassionate, and always pleasant to talk to, I am so lucky to have him as a provider. He is the reason I come to Stanford.
Dr. Clarke was incredibly professional and attentive. His positive and welcoming demeanor was greatly appreciate. Overwhelmingly positive experience.
Dr. Clarke is one of the most caring, compassionate, professional, and knowledgeable Doctors I've met in my 10 1/2 year journey. I suppose not so much a health journey but nightmare given I've been misdiagnosed 5 times. I would not give a MD an "A+" rating after all I've been through but Dr. Clarke is a MD and man that can and does carry the mantle of greatness. He is not only trying to create a plan for my (many) digestive health issues, he's seeking to link my overall (holistic and functional).health. I am in Palliative Care and Dr. Clarke and I share a singular vision: better my quality of life in any way feasible. Truly, I'm thankful for Dr. Clarke and his Team.
Thank you for all you do
Seamed like very nice Dr.and had some ideas how to help me. Looking forward to talking with him again.
Dr. Clark was very thorough, very knowledgeable, very nice, he listened and answered all my questions, and explained all procedures.
Great provider, very attentive , takes his time explaining and answering questions. He is very thorough.
John Clarke is careful, thorough and easy to talk with. He's an excellent clinician and I'm delighted to be one of his patients.
We are extremely happy that we are under Dr. Clarke's care.
I appreciate the promptness and courtesy with which i was treated.
I think he's great! Dr. Clarke listens well, answers my quesitons thoughtfully, gives expert advice on future health guidelines for me. I always feel like he is truly looking out for my best interests.
Thank you once again for your support, thoughts, suggestions, openness to patient thoughts and current research for treatment direction. Dr.Clark is also a great listener and has compassion for his patients.
Dr. Clark was very pleasant and helpful in explaining the procedure and all that is involved. Appreciate his honesty and discussion of my symptoms, next steps, which alleviated my concerns going forward when necessary.
Excellent health care provider. Is straight forward and easy to comprehend his rationale in the recommended treatment.
Dr. Clark is very respectful and knowledgeable. I appreciate his Medical advice very much. We are happy we found him and had his guidance.
He is a great listener very knowledgeable reassuring and I look forward to his help w my care regarding this visit.
He was sincere and asked questions about my symptoms.
Wonderful. Perfect.
Dr. Clarke is an excellent doctor, I'm so grateful to have found him. He is very knowledgeable and communicates easily about my health concerns. I have a very high level of confidence in the information I receive from him. I'm also regularly impressed with the care he shows for his patients, and the way he advocates for his patients, and explores new ways to improve care from me technology and research.
Dr. Clarke is a wonderful doctor.
Very thorough and easy to communicate with. He took the time to cover all items of concern to me.
Dr Clark listened and provided proactive advice...rarely happens with other doc
Dr. Clarke, I really appreciate you taking the time to explain my test results thoroughly yesterday. It's always a pleasure to speak with you, be it in person or virtual. Thanks again!
Best appt I’ve had in years
Excellent consultation! Dr Clarke is a fount!
He is a wonderful doctor look like is taking care of his patients
Wonderful experience With Stanford wonderful doctors and helpful staff I recommend everyone
Dr. Clarke is so excellent and knowledgeable, I am grateful for his whole team. Patient, and kind.
Very professional. Cares how I feel .!
Trustworthy, specialized doctor Who is personable, warm and caring.
Dr. is very thorough and spent time with me to explain my conditions and treatments in details.
amazing. took the time to listen to me. i did not feel rushed at all.
Dr. Clarke and his team have worked so very hard for me to help me regain a semi-normal life! His kindness and his willingness to try less aggressive things first really makes me trust him as a Dr. and not just a medicine pusher. He explains things, is understanding and I will forever be grateful to him for figuring simpler solutions to my complicated issues. He also gave me hope that I can live a long life even while on a formula if things ever came to that. He really is a great Dr. and should be given a really nice vacation! ha ha!
Very knowledgeable about topic of discussion. Gave me time to ask questions at the end.
Dr Clarke is awesome! Knowledgeable, engaged, kind, patient, personable, trustworthy, and an excellent listener.
He is very nice
I have utmost confidence in Dr. Clarke and am more than happy to have him as my doctor. Dr. Clarke treats me with great care and compassion as well as expertise. I appreciate how clear, concise and effective he is in his communication and that he keeps me abreast of current medical news pertinent to my condition. I feel very well cared for by Dr. Clarke and his team.
He is a very good listener, smart and very kind. Really seems like he cares. Good guy and dr.
Very excellent Doctor.
I really appreciate Dr. Clarke's experience and support to my daughter's care.
Dr. Clarke is an outstanding doctor. He cares about my concerns and always listens attentively. He is very nice and kind. I feel very fortunate that he is helping me improve my health.
Dr. Clark always gives cutting edge, comprehensive consults in a manner I can understand. He is very compassionate, caring and good listener. I am grateful for Stanford Health having such an outstanding and talented doctor to provide care to their patients.
He is a very good doctor.. diagnosed in the right path .. gives adequate time for the problem and really caring
Dr. Clark and his assistant were very understanding and thorough. Great!
Dr. Clarke is a warm, compassionate and highly skilled doctor. He is patient-centered, took detailed, brought forward ideas that could be helpful, and approached the appointment with deep respect and collaboration.
Great "bedside manner" and really listened. I felt like he heard me and understood my concerns completely. I felt like a part of a team and we would be working on a solution together, no doing just what he wanted. We need more doctor's like Dr. Clark.
Great doctor. Good listener. Explains well. Didn't rush.
He is a great surgeon and very kind
He is very kind, pleasant, easy to talk to and made me feel comfortable immediately!!!!
I like him very much. He was very thorough and understanding. Also he knowledgeable.
Very caring and thorough Drs.
Very knowledgeable and friendly and helpful
Dr. Clarke is always kind and friendly while also being very professional. He doesn't seem rushed and takes the time to answer questions and address my concerns. I look forward to our appointments because I always come away with useful information and confidence that I am in good care.
Excellent listener. Very personable and clear.
I have the utmost faith in his capabilities and trust his judgment in what we should do in the future for my medical situation.
Dr Clarke and his staff (Monica and Melissa) were very polite and thorough during my initial appt. I was very impressed with their explanations and their knowledge of my health concerns. I felt very confident in their abilities to provide the best care and to do for me what’s in my best interest. Amazing visit
He's a terrific caring doctor.
Excellent and caring provider!
What an excellent doctor! He was very friendly and clear throughout the visit. He asked questions and was patient and encouraging with my answers. He was also very detailed and helpful with his replies to my queries. He was able to address my concerns with much care and was able to provide information clearly to my husband and I.
He is a great listener for my concerns.
He listens. He takes his time. He makes sure I understand.
Very impressed with Dr. Clarke & support members!
Careful analysis of my belching problem with suggestions to modify the situation.
Dr. Clarke was great - he truly cared about my health and medical condition and answered all my questions.
Dr. Clark was quite thorough in discussing my condition and in recommending next steps in a plan of care. He was very positive and easy to talk to and open to my thoughts. Additionally, the person that conducted an interview with me before meeting with Dr. Clark was also very pleasant and thorough. .
Dr. Clarke is always excellent. He's kind, caring and a good listener. I have the utmost confidence in him.
Excellent Dr!!!!! Extremely thrilled to be under his care!
My visit to Dr Clarke was: 1. Without the presence and questioning of associates doctor which saves time of the visit; 2.the visit was structured really well- I was asked about the current conditions and it was compared with the previous visit, definitely some progress occurred. The treatment is on the right track.3. The doctor is a very good listener. The visit was very pleased.
Dr. Clarke has wonderful "bedside" manners. He listens patiently to what I have to say, he speaks clearly and calmly, and I always feel that he values and respects my questions, which he always answers. I have been treated by a lot of doctors for a variety of reasons, but very rarely I have felt as respected and understood by a doctor as I do with Dr. Clarke.
Very attentive with patience to explain thoroughly
Dr Clark and his staff extremely Nice and Awesome
Dr. Clark was very nice and understanding
Dr. Clarke is not only a professional but also an understanding individual. He is in tune with his patients. He asks pertinent questions and explains procedures in a way that the patient is able to understand. I would definitely recommend Dr. Clarke to anyone. He is the BEST.
He’s an excellent doctor.
First visit, very impressed. Look forward to seeing him again.
Dr. Clark is a grate doctor and a wonderful person
Dr. Clarke is a pleasure to deal with. He's knowledgeable, personable and an excellent physician.
I really liked him and his assistant. He understood my issues and had thoroughly reviewed my past history and tests.
He is an excellent Doctor. He answered all my questions and then some. dr. Clarke is very thorough.
Dr Clarke was one of the most knowledgeable and caring doctors I have seen. I feel very fortunate to have met him and look forward to working with him on my conditions.
He is very patient friendly and a fine Physician.
I felt really lucky and relived after talking to Dr. Clarke
Very glad he's my doctor!
Dr Clarke was courteous, attentive, excellent communicator, professional, and consistently responded with empathy. It was clear that he had prepared for the visit having read the past history. The decision/conclusion we made was the result of a collaborative process which Dr Clarke encouraged.
Dr. Clarke is wonderful and takes his time to answer questions. The staff are also very helpful.
Dr. Clarke was very professional and knowledgeable. He came into the visit very obviously educated on my medical history and it was obvious he had read my past medical history notes. He heard me as a patient and was very attentive in listening to my concerns. I would recommend him to anyone.
Love the guy. Talks to me as an equal. Does not dumb down the conversation like some other doctors do and also includes me in the treatment decision making process. Takes my comments and concerns and ideas seriously.
Dr. Clarke is one of the best doctors that has helped me with my health care. I appreciate all that he has done for me.
Dr. Clarke is very patient to explain my issues. I am 100% confident on his professionalism..
Dr. Clarke is great.
He is a consummate professional and warm and compassionate . He is also a great listener and inspires confidence. I feel very lucky to have him as a doctor.
Dr. Clarke answered all my questions carefully and thoughtfully. I really appreciate having Dr. Clarke as one of my doctors.
Nice visit. Explained everything very well
The Dr and the NP were extremely knowledgable and were able understand my issues and concerns and did everything possible to address them. Extremely happy with the visit
Very personal and great focus
He was very thorough and answered all my questions. I am grateful he is willing to take me as a patient. I feel very comfortable having him perform my procedures.
Thank you for llistening and agreeing to take on the whole gastric "experience " ...the local guys are just not you! ðŸ™
Excellent doctor
He took time to explain his thinking and the plan forward. Quality guidance.
He is an excellent physician and actually listens to the patient. He is very patient and understanding.
I’ve been to 6 GI drs over the past 1.5 yrs. I FINALLY feel like I’m in good hands and will begin to finally find some answers! The fellow that spoke to me today was super as well! She was so personable, listened, and very caring! My faith is being restored in Stanford after bad experiences in the past. Dr Clarke was fantastic! He’s taking the bull by the horns in a methodical way and I like that! He said my case is challenging but he likes that and I felt like he’ll get to the bottom of things! Such a great visit!!
Clear, knowledgeable, open.
Very professional, knowledgeable, and made sure I understood him . He showed me that he cared about me and my problem.
Excellent consultation
He is a great Physician and a nice person
Very good to see Dr. Clarke & all the familiar faces as it had been awhile since Covid.
Dr. Clarke is a wonderful doctor. We travel a great distance (3 hours) to see him and will continue to do so. He is organized but also very friendly and helpful. He is conservative which is always a thoughtful way to treat symptoms that might be helped with certain foods.
Dr. Clarke is excellent! He listens and clearly explains things. He is the only doctor that I've ever seen that I would drive 2 hours to see.
He is Awesomeness!
Very approachable, listens, educates while discussing options to assist in pts plan of care
He's thoughtful, knowledgeable and patient. A good specialist.
I think he is a very caring able Dr.
Thank you, Dr. Clarke.
As always pleasant, asked many questions, and discussed my condition. He had several suggestions, and requested follow-up communication if any difficulties arose.
He was very thorough and listened to us
We love Dr. Clarke and how well he understands my daughter's case.
Dr. Clarke listened very carefully to all my concerns before recommending treatment. He is patient and knowledgeable. He was very kind and understanding. I really appreciate all his help and I am very happy he is helping me feel better. Thank you! :D
Thank you very much. Friendly, informative, encouraging.
Dr Clarke was fantastic. Knowledgeable, kind, a good listener and explainer.
Great Doctor
He's extremely knowledgeable and compassionate. I feel fortunate to be able to work with him.
Dr. John Clarke is an excellent Gastroenterologist that I will not hesitate to anyone. He is professional, caring, listens and gives top nosh advice!
Doctors took time to understand your concerns and provided detailed explanation
Dr. Clarke is hands down one of the best doctors I've ever seen. His explanations are extremely thorough, clear, and he provides insights into relevant clinical studies. He lists alternative options and outlines pros/cons for each one. Very calm and kind! 10/10 Recommend!
Great Doctor. Would like to be able to get ahold of him easier via my chart. Often, I get answers from someone on staff, not from him directly.
Dr. Clarke is a very asset to Stanford. He is kind, caring, knowledgeable and goes above and beyond for his patients. My mother is very lucky to have him as her doctor and we are very blessed that he is overseeing her care.
Very pleasant and easy to talk to.
Dr Clarke is kind, caring and attentive
Dr. Clarke and his Nurse Practitioner took the time to explain things to me. I appreciated their time in trying to help me.
Dr. Clarke is very caring and does not rush you through the visit. He is easy to talk you and clearly listens to you. I trust his judgement ..
Appt with Dr Clarke was excellent and I greatly appreciate his time and input. Thank you!
Dr Clarke is excellent. He is compassionate and knows his stuff!
Dr. Clarke is a wonderful doctor and I consider myself quite lucky and quite blessed, that I was referred to him!
Dr. Clarke is very thorough.
First rate - Does an excellent job!
Very considerate compassionate, professional and thorough physician. Thank you.
Dr. Clarke is a compassionate, caring and kind doctor, there is no other doctor I have ever had like him. He excels in the care of his patients and listens to their concerns. He is open to modalities that may help his patients and never makes us feel bad about wanting to explore them. He truly understands the mind-gut connection.
Dr. Clarke was very friendly, knowledgeable, and patient. He listened attentively to what I had to say, and explained things carefully and slowly, which I REALLY appreciate. Dr. Clarke also gave me different options for approaching my health problem, followed by his advice to what he thought would be the best course of action for me. (I've had issues with other doctors who also gave me options, but asked me to choose what I wanted to do and I didn't feel I could make that choice). I also appreciate that the appointment started and ended right on time. Overall, an excellent consult.
Exceptional physician Sent my entire family and all my friends to Dr Clarke
He and his time are the best!!!
He was patiently listening and suggesting remedies to all the concerns I had.
Very caring about my welfare.
Thank you!!! Seems like a Very personable Dr and u just don’t find many of them anymore. I am really excited to see if Dr Clark and the Stanford team can help me with my complex issues. Seems to me as I am going in the right direction with Dr Clark.
Dr. Clarke showed interest in my situation, and was very thorough in putting the big picture together from my precious history up to our visit, to properly access my next steps. I’ve been challenged with symptoms since March 2020, and felt heard and understood. He also explained my previous test results more thoroughly than I have experienced. I left the visit with hope, and a plan I understood! My thanks to Dr. Clarke.
Great as always. Knows me…that explains it all.
I have not met Dr. Clarke in person, only through telehealth. I have found him knowledgable about my issues and very thorough going over them. He answers all your questions in a helpful way. He is smart, warm, and kind and I feel like he is really looking out for you. I'm looking forward to meeting him in person!
Dr. Clarke is very courteous, friendly and professional with no pretensions. He's also practical and realistic.
He is one of my best Doctors. I know I am in great care with him!!! Listens/explains/cares ...
Great attention to my case. Very satisfied.
Very caring, excellent bedside manner, doing his best to help me with my illness.
Dr Clarke listens and supports what I do to help myself. Encourages. Thanks.
He is excellent in patient care, knowledge, and approachability. I feel fortunate to have him on my team as I have difficult issues.
Dr Clarke is my favorite provider. He always makes me feel like an important part of my healthcare team. I know I’m in good hands.
Dr. Clarke is an excellent physician. He is companionate, smart, and creative. He keeps up with the latest developments on GI medicines. He is a real asset to Stanford Health Care. I feel so fortunate that he is my doctor. He has changed my life for the better. I can now have a normal life thanks to his skills in recommending the correct medicine for me when other doctors were not knowledgeable enough to solve the problem. I am a huge fan!
Dr. Clarke is great. He has helped me so much and is always kind and caring.
Dr. John Clarke is absolutely amazing. His expertise is matched by his humility and great listening skills. Getting under his care was one of the best things that happened to me health wise.
Excellent doctor for my GI issue!
He explained very well the different causes and solutions to my problems
He was very helpful and explained everything to me in detail. Thank you!
He’s a good doctor , I feel like he’s taking care of his patients even if not in person visit
Dr. Clarke is an excellent Gastroenterologist!
Both Dr. Clarke and Monica Nandwani were very patient and pleasant to speak with. We really enjoyed our visit with them.
Dr. John Clarke had a personable tone in the setting of the video consultation, which helped my Mom (the patient) and I feel safe about discussing my Mom's health concerns and moving forward with the plan of care. Thank you Dr. Clarke.
Dr. John Clarke is a wonderful, caring doctor. We would go even further just to have him as our GI doctor. He is articulate, easy to understand, thoughtful and conservative. He puts one at ease discussing issues that are sometimes hard to discuss. In other words HE IS THE BEST!
I always get the best and latest medical advice for my condition here.
Dr Clarke was very attentive and explained things very well. He provided helpful information and gave me good treatment options.
Great video call and excellent communication. Never feel rushed.
Seems very competent. I liked him very much.
Excellent physician, glad he is working with residents
Very kind, informative, knowledgeable and answered all my questions. Great experience!
Excellent doctor. Extremely knowledgeable, caring and easy to talk to.
He is an excellent doctor.
He is a very caring and I felt very comfortable with him. He does patients needs first priority. I have always been happy and content with his handling different issues.
Great Doctor. Genuinely concerned.
Dr. Clarke was cordial and thorough.
Dr Clarke is the best doctor I have ever had. Deep gratitude for all he has helped me with!
Dr. Clarke is very knowledgeable and caring. I always look forward to my visits with him.
Great doctor, very knowledgeable.
doctor had reviewed the available info from other offices and no time was wasted. a good doc
. I highly recommend Dr.John Clarke. He is a great Doctor. Thanks a lot !
He was very polite and great in giving me some good news.
Excellent physician who is knowledgeable and cares.
Excellent, very patient, explains my health concern very well, and will followup with results.
Dr. Clark asked great questions and listened when I spoke. He explained all options and summarized my result clearly.
Great listener, explained things clearly and answered all questions
I found Dr. Clark to be very knowledgeable and helpful in the explanation of my condition and planning of my care. He answered all of my questions to my satisfaction and I agree with him on his planned protocol going forward
Very thorough! Appreciate his expertise.
Dr. Clarke is an excellent doctor. He is good at listening and explaining. He really takes my complexities into consideration when making decisions on procedures. One of the best docs.
Dr. Clarke was excellent. Friendly, knowledgeable and reassuring. Thank you
My visit with Dr Clarke was wonderful as usual. He is very thorough and allows me to be part of my healthcare decisions. He gives me hope when I’m dealing with my serious GI issues. He is open minded and I’m so grateful he is my doctor.
I previously described Dr. Clarke's expertise, professionalism, knowledge, approach to analyzing the options and genuine sense of interest in resolving the issues in my previous comments section. The only other thing I would add is he generates warmth and caring.
Prefer his style of presenting options which are well explained.
Wonderfully informed and thoughtful!
Appreciated Dr. Clarke’s attention and helpful suggestions during the video visit. Also, was able to arrange follow up video visit and in clinic visit.
Dr. Clarke had a plan for my illness and was very positive about the outcome, which made me feel better.
I am so grateful to have Dr. Clarke on my "Care Team". Dr. Clarke is very kind, open-minded, knowledgeable, understanding and respectful. Dr. Clarke is very supportive of a patient's decision to explore non-invasive treatments within reason.
Dr Clark is a doctor I feel is honest and takes his time to listen he doesn’t make me feel that he is in a hurry I am very comfortable with him and I’m happy that he helped me after years of not knowing what was wrong with me thank you so much
Thanks for providing me with the "current" info for those areas discussed. Always appreciate your openness to my use of added health resources to develop a plan to live will with my chronic digestive issues.
Has resolved the issues that directed me to him in the referral.
Wonderful and personable. A great physician and very knowledgeable.
After 2 years, Dr. Clarke has yet to figure out what's wrong with me.
Dr. John Clarke is amazingly good - Both in "bedside manner" and understanding the medical issues and explaining them in an honest manner to the patient.
The best doctor ever!
Dr. Clarke is an excellent care giver, very professional and caring.\
amazing care, awesome Doctor. things are always explained in a way I can understand. any questions or concerns I have are always addressed.
Dr. Clarke is the best doctor that performed my colonoscopy procedure.
Genuinely concerned included me in decisions about my care. was not rushed
Best doctor ever! Friendly, listens explains any concerns. Have total trust in Dr. Clarke. Only wish there were more doctors like him.
was impressed with Dr. Clark
Dr. Clarke is fantastic and has been an exemplary example of the professionalism and world-class level of care provided by Stanford.
It was a pleasure to talk with a physician who is not only kind and considerate, but who clearly knows your situation and how best to deal with it.
Dr. Clark does an excellent job. Explains everything clearly -
Dr. Clarke is a very kind, caring and compassionate doctor. He is extremely knowledgeable in Motility and Scleroderma GI involvement which is mandatory for a patient such as myself. I feel very confident in his treatments and advice.
Dr. Clark "ROCKS." Dr. Clark - 1:1 meeting.
Dr. Clarke is always very attentive and puts you at ease.
I'm not really one of those people who marks very good for everything, but this just so happens to be the truth. This provider speaks to you as an equal, with thorough amount of in-depth information so you can make good decisions for yourself about your care. Really the best provider I have ever seen for any issue or trouble.
Dr. Clark is an amazing, caring, and knowledgeable doctor.
Dr. Clarke is amazing! I've been very ill for a long time and for the first time I've been given hope. He is very knowledgeable, caring, and thorough. I have not been this impressed with a care provider before. I am grateful to be under his care.
Dr. Clarke performed his duties above and beyond. I have utmost confident in his medical abilities.
Excellent providers. Did a wonderful job in answering all my questions.
Dr. Clarke is an exceptionally great specialist. He is also a great human being with understanding compassion and patience.
Dr. Clarke was extremely knowledgeable about my symptoms and conditions. He put me at ease with treatment options and further care. He was not in any rush and I appreciated the time and thoroughness he gave me.
Although he was running quite late due to the crisis, he did not make us feel hurried and answered all questions asked of him.
Dr Clarke is the best all around!
shared with neighbors ,friends and family what a good experience we had . Neighbor has already called and schedule a visit with the provider.
Dr. Clarke is an excellent physician.
MD and resident & intern were great. Stanford itself, though, always leaves much to be desired where support staff and such are concerned.
Dr. Clarke is wonderful. Kind and considerate of my issues and general health! He is reassuring and gives me hope.
As much as the dr. as his personnel are very nice and humanitarian.
I was pleased with the care I received. The doctor answered all questions and addressed my concerns. He was patient and did not make me feel rushed. I appreciated the amount of time he dedicated to my appointment.
Even as we were late he spent time with us as needed.
Clarke and his PAs have been great. We are working through a plan and he's been supportive of my desire and needs. I've already recommended him to others.
Dr. Clarke was very professional & informative.
Dr. Clarke is a very patient doctor.
I know that my mother is in very good hands with Dr. Clarke. He takes the time to listen to her. He asks for her opinion about other care options and is very empathetic and concerned for her health. Her health is what it is but is really helps her to deal with her issues knowing that Dr. Clarke continues to try and provide relief. He also advises of new and upcoming medications that may assist her. We are very grateful to Dr. Clarke for his care of my mother.
Best GI doc I've seen.
The doctor did NOT review my history (medical records) and I had to start again - Very unproductive.
Dr.John Clarke is very personable, helpful and knowledgeable. I am getting to know him more and as of now, I feel comfortble with his approaches.
This is when it gets GOOD!! Dr. Clarke is amazing, kind and spends a lot of time!! Dr. Alexander Podbody is amazing. He has qualities that will make him a successful doctor!!!! Both have great "beside manner."
The problem is a plan is created and then never executed. Also there have been a few times I have messaged using the online portal and no one responds.
I've never spent so much time with a gastroenterologist. Dr. Clark didn't seem to be in a rush (a common experience I've had in the past), and used the information from my esophagus biopsy (done in 2017) to inform me of another illness that I didn't know I had and that was causing a lot of my symptoms. This information and his advice have already made a difference.
Dr Clarke has always had a listening ear and provides a great bedside manner. his knowledge is vast, but he's also willing to admit when things are difficult. he's a wonderful doctor!
Dr. Brian-Clark is fantastic, one of the finest physicians I have ever dealt with. Thank you!
Dr. Clarke is a excellent doctor. He is caring and helpful.
I had a wonderful experience with him. He was very friendly and understanding and accommodating to my needs.
Dr. Clarke is patient, friendly, knowledgable and professional. THANK YOU so much Dr. Clarke.
This is my first visit... overall experience with doctor was good. follow ups and scheduling is pathetic with his staff.
Dr. Clarke epitomizes what an outstanding GI Doctor ought to be. Please keep him happy so he'll stay put.
The care providers were very patient
Dr. Clarke gave me excellent care, took the time to walk me through my questions.
Dr. Clarke and his associate doctor really listened to all my concerns. Both doctors took their time and never rushed me. It was an extremely positive first experience.
Doctor Clarke was very kind I liked him. Most doctors I deal with are arrogant he was not.
Excellent provider
Based on similar Drs I have visited in the immediate area Dr Clarke is hands down the most courteous and professional Dr I have found.
Very good!
Dr. J. O. Clarke was very understanding and answered all my questions. He offered solutions that made sense and overall I felt confident that I will get better.
Dr. Clarke was wonderful and made me feel very comfortable.
These comments refer to Dr. Clarke. I was somewhat concerned that he thought my connective tissue disorder (EDS) didn't apply to internal organs, muscles and viscera--only to skin and joints. I was pleased that he took note with my concern and correction of this perception. Overall, Dr. Clarke was a very kind and knowledgable and a good listener. I wasn't expecting him to suggest P.O.E.M. and had prepped my questions for dilatation, and so afterwards, thought of questions about P.O.E.M. I should have asked...
Excellent service from Dr. John.
Both NP and doctor were very informative and helpful. Great bedside manner!
Dr. Clarke is a very good & caring doctor.
I would recommend my care provider to my family, friends or anyone that I meet.
Dr. Clarke is very personable responsive to my needs and issues good listener and extremely well organized with a PLAN at follow up after endo/colo.
Dr. Clarke is excellent. Very knowledgeable yet humble. He listens very carefully to his patients. Best GI dr. I had every have.
Dr. Clarke seemed to care.
I have already recommended Dr. Clarke to others.
Dr. Clarke is the best.
Again really liked Dr. John Clarke. He's a caring and thoughtful Doctor!
He communicates his expertise in a way I understand and lets me know his reasoning for his decisions.
Dr. Clarke is and patient. My health issues are unusual and complicated and I have really appreciated his persistence in trying to get to the bottom of the problem even though several tests have not yielded any easy answers.
O'Brien is the best GI Doc I've ever seen; and I've seen many. He's smart, keeps up on latest research, friendly, and takes the time to brainstorm options with me.
This was my first time seeing this dr. He explained things very well.
Has better insights than other G.I. dr.'s I have seen.
A most reassuring experience.
I find it very easy and pleasant to discuss my care with Dr. Clarke. I have great confidence in him.
Very caring and thoughtful.
Easily the best doctor I have seen. Very precise, helpful. Wish there were more such doctors. When the doctor is confident, the patient feels confident. Dr. Clarke takes the time to answer questions. I trust him.
So thankful to have Dr. Clarke caring for me.
I was very impressed that he did some research/reading about my issues prior to coming in to the room and then told me about what he had learned. Taking that extra step/time did not go unnoticed
Dr. Clarke is amazing! He is very thorough and open to my questions and requests. I have seen several Gastroenterologists and he has been the one to give me the most hope.
Dr. Clarke is awesome.
Dr. O'Brien reviewed my medications and determined that some were those he would prescribe, but possibly in different doses. We agreed that if my symptoms increased again, I would contact him.
Dr. Cooke is a caring, patient, supportive doctor.

View More »

Referring Physicians