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Gastroenterology Consultation
65 Harrison Avenue, Suite 201, Boston, MA, 02111

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Professional Statement

*PLEASE CALL OUR CLINIC BEFORE YOUR APPOINTMENT TO CONFIRM INFORMATION, INCLUDING INSURANCE ID *IF THIS IS YOUR FIRST APPOINTMENT WITH DR. JOHN LEUNG, PLEASE REMAIN OFF OF ALL ORAL ANTI-HISTAMINES 7 DAYS PRIOR TO YOUR APPOINTMENT. These include: Benadryl, Loratadine, Allegra, Claritin, Alavert, Zyrtec, Zantac, Singulair, and all other oral anti-histamines. John Leung, MD is the founding physician of Boston Food Allergy Center, director of the Food Allergy Center at Tufts Medical Center and co-director of the Pediatric Food Allergy Center at Floating Hospital for Children. He is the first US-trained physician triple board-certified in Allergy/ Immunology, Gastroenterology and Internal Medicine. Dr. Leung attended medical school at the University of Michigan Medical School and completed his internal medicine residency at University of Iowa Hospitals and Clinics. He then completed a 4-year clinical/research Gastroenterology fellowship at Tufts Medical Center, followed by an Allergy/Immunology fellowship at Massachusetts General Hospital/Harvard Medical School. Dr. Leung is the site principal investigator for multiple NIH-funded and pharmaceutical sponsored studies. He is an assistant professor in the Department of Medicine and Department of Pediatrics at Tufts University, an adjunct faculty in Immunology, an affiliated faculty of Tufts Institute for Innovation, and a nominating committee number of Obesity, Metabolism & Nutrition section of the American Gastroenterology Association Institute Council. He has coauthored numerous peer-reviewed manuscripts, scientific abstracts, book chapters, and online tutorials. His clinical and research focuses are on eosinophilic esophagitis, gastrointestinal disorders, food & intolerance as well as other allergic/immunologic condition

Zocdoc Awards

Verified Patient Reviews

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He was very thorough, listened and asked questions to better understand my situation and made me feel comfortable right from the start. He explained things very well. Highly recommend.

(Verified Patient)

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Dr. Leung was great. He was very helpful and honest and straight talking. Would highly recommend him. He even folled up with me to make sure I got my perscriptions okay.

(Verified Patient)

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Really great experience with Dr. Leung re allergy testing. Would definitely recommend. Very thorough and knowledgeable, and he listened and wants to help.

(Verified Patient)

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I was impressed with Dr. Leung. Great office staff to support his practice. Never felt like he was in a hurry, answered all my questions (backed by research and study). I would highly recommend his practice.

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Not the best first impression. I came in early, waited, did a Q&A with a nurse, and waited for a while to finally see Dr. Leung, then he did a very quick and general Q&A and concluded that I had IBS. He did not examine my bloated stomach nor explained anything further about IBS itself. Then he gave me 2 options, diet or medicine, I asked what kind of diet, and he said FODMAPs and told his nurse to let me watch a video about it on a tablet and left without saying anything. Then I did 2 tests and was told to come back in a week. I feel like I should have received more explanation and care from Dr. Leung as he rushed through everything. Not the consultation and 5-star professionalism that I expected from reading the reviews.

(Verified Patient)

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Dr. Leung was the best, most professional doctor I have encountered In a very long time. He approached me as a whole person not as an individual with symptoms to write a script for. Although we ultimately haven't found an answer to my symptoms, we have ruled out serious things which in itself is very helpful.

(Verified Patient)

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I LOVE him! He is very knowledgeable and understanding. I also love how pleasant the receptionist & nurses are... Always smiling & happy to help!

(Verified Patient)

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I arrived early because I drove into Boston and did not want to be late. Dr. Leung came over to me and introduced himself. I was signed in early and they did the test thirty minutes earlier than scheduled. Excellent staff members, pleasant and efficient. Dr. Leung's patient areas were neat and clean which I appreciate. I had a very positive visit at The Boston Food Allergy Center. Dr. Leung is an extremely intelligent physician and he is on top of everything in his specialty. I trust his medical diagnosis.

(Verified Patient)

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Dr. Leung is amazing! While I was waiting, he came over to introduce himself and say he would be with me as soon as possible. The front desk staff were very friendly as well. When he finally saw me, he was professional and knowledgeable and made sure to let me know I could call/stop in any time. Would recommend him for adults and children!

(Verified Patient)

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He worked very efficiently. I spent only 30mins and he helped for all my needs

(Verified Patient)

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The entire staff was really friendly! Dr. Leung took the time to walk me through all of my options and answer any questions I had. He was joking with me and really cared about getting me the best treatment that works for me. Highly recommend!

(Verified Patient)

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I had no issues whats-so-ever. The staff was helpful, and Dr. Leung was thorough and engaging. I watched him handle wild, twin 3 years with ease, while I, as a mom, was cringing and feeling badly for the furniture they bounced all over. .

(Verified Patient)

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Dr. Leung is one of the best physicians I've ever encountered. Always on time, always involved and follows up after of his own choice. My kids are well cared for by him and his team.

(Verified Patient)

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Dr. Leung is an excellent doctor. He examines easy, natural fixes prior to jumping to medication. He explains his rationale and is very up front. I would recommend him to anyone.

(Verified Patient)

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inspired confidence in me that whatever is going on with my body, we will fix it! loved transparency and efficiency. A+ all around

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The wait time was absolutely ridiculous. I had an 8:30 am appointment, I got there early and didn't see the doctor until 9:45.

(Verified Patient)

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I highly recommend Dr. John Leung for his knowledge of gastro-intestinal concerns he is up to date on treatment plans. Bonus he is kind and fun to have conversations with. His staff is also very sweet and caring. Patrice Mc

(Verified Patient)

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Dr. Leung & his staff are kind and not stressed. The office seems a little chaotic but runs smoothly. I was surprised by how open the office was and how casual. The doctor is right there. I wanted to ask him another question and I was able to. He's not shut off behind endless corridors and rooms and counters like most typical doctors. The dietician listened intently to me. She was kind and caring. She took detailed notes of what I said.

(Verified Patient)

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Knows the I-693 in detail, and spent some time to reassure me about quality control. He understood I was in a hurry, and paid attention to speeding up the process. Receptionist cared a lot about reducing my costs.

(Verified Patient)

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Dr Leung is very detailed, professional with a broad base of medical knowledge and experience. He cares about his patients and their detailed medical history. He knows how to access great mefical resouces through his Tufts association. He is highly respected by his peers.

(Verified Patient)

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Excellent bedside manner, calm and unhurried.

(Verified Patient)

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I think this is a great center! First time in years that I feel fully listened to: they take the time to go over your history, and consider all your feedback/concerns. Very human interaction! I also that doctor Leung is very considerate, and made a true plan of action for my situation. He is also extremely honest and upfront about what tests he thinks are needed and what are not. My experience was absolutely great and looking forward to come back for the next steps.

(Verified Patient)

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This was the first time I had to wait close to an hour. They apologized profusely. But when I did see the doctor and the assistant, it was not rushed and they answered all my questions. I can't say enough good things about Dr. Leung, I recommend him highly.

(Verified Patient)

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I can't say enough good things about Dr. Leung. He is extremely professional, caring and intelligent. We went in for a third food challenge today as we try to eliminate which foods our child is allergic to. She had a reaction today and he was great at explaining why he was taking the steps he was to counteract the reaction and what we needed to do next as well as how to move forward in the future with the food allergies she has tested positive for. We are very thankful to have found so a great doctor and office for allergy issues.

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He is the best doctor we have worked with. After a 22 month question on my son allergy he was able to not only help figure it out, but the approach he took was amazing. I am grateful I found him when I did. With out him I do not think I would have figured out my son issues. I highly recommend him to anyone.

(Verified Patient)

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He definitely knows his medicine, but it was important to him to try natural remedies (diet changes and so on) first. With a bad doctor this is just a waste of time - they never get anywhere and you get pills anyway. With Dr Leung and his team, I got the right diagnosis and the right treatment, without costly medicines with unclear side effects. This is exactly the doctor I wanted.

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The nurse drawing my blood had a lot of trouble getting blood out. I've had blood drawn many times and this is the first time it happened. It was pretty painful when she poked around with the needle inside. Getting my blood pressure taken was also agonizing. A student did it, and it took several tries before she could get a reading. My arm was numb by the time it was done.

(Verified Patient)

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Dr. Leung's office is one of the better run doctor's offices I've been to -- and I've been to many. He is kind, understanding of both the kids and the parents. Wish i didn't have to bring my daughter in at all, but it's nice to know she is in good hands.

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Great experience except for the wait time in the office.

(Verified Patient)

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Dr. Leung is truly one of th best doctors I've ever seen. My daughter is currently undergoing a host of allergy testing and he is extremely kind, thorough and knowledgeable. He cares about his patients and his staff is great!

(Verified Patient)

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Today I did not see Dr. Leung. At his allergy clinic today, the staff members are just wonderful. Dr. John Leung is a wonderful and attentive doctor. Respectful to his patients, listening and understanding to your conversation with regards to your health condition. I am very pleased for the referral of a close friend.

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I completed the patient intake form on ZocDoc and did not have to do any paperwork in the office. The care I received was prompt and Dr. Leung checked in regularly during the testing. He was friendly with my toddler and had some toys available in the waiting room. This was helpful during the lengthier visit while we had tests done.

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Dr. Leung was great, but he was supposed to contact me regarding a recommendation for a sleep medicine doctor and never did. No follow-up. I was impressed with his knowledge in the office, but when I didn't hear back from him, I wasn't happy.

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Dr. Leung was great. He listened, explained things thoroughly, and provided options. I felt I was being well cared for.

(Verified Patient)

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Excellent visit with all involved. Very professional appt was at 11. I arrived after 9 and was seen within 15 minutes. I would highly recmoment Dr Leung

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My visit with Dr. Leung was great! He is very kind and at the same time very professional.

(Verified Patient)

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Love this doctor. Takes time with you and explains in detail what's going on and writes things down for you to understand your treatment plan. This doctor is very professional and knowledgeable. Love him.

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I had gone for a specific medical check-up as required by the Immigration process. Dr Leung was friendly, responsive and provided proactive guidance and answered all my questions. The clinic itself is bright and clean. The building in which it is located is a bit drab and nondescript.

(Verified Patient)

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Very good. Very pleased. Always very polite and professional and knows what he is doing.

(Verified Patient)

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Listened to my concerns and did the appropriate test needed to see if I was right.... Found out I was right on both concerns. SIBO and Asthma confirmed Thanks

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