Book an Appointment
Qualifications and Experience
Awards and Publications
*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
Verified Patient Reviews
Dr. Leung was outstanding. He explained everything needed perfectly and worked towards solutions.
Very thorough examination and comprehensive care solution - both in terms of medication and everyday habits I can change to improve my health.
Excellent - friendly and explained everything very well.
I just love this office-- everyone is joyful and polite and respectful. I never feel rushed with Dr. Leung and he genuinely cares. I really like the assistants too, as well as his intern. I am here for a difficult situation-- eye pain which I believe is tied to gut pain, and Dr. Leung is working with me to try to get to the bottom of 6 years of pain and gut issues. So many offices these days are rushed or rude and this one is not. I am so grateful to have found them!
Dr. Leung was amazing. He was thorough, transparent and quick! He also laid out several treatment plans and let me choose what was best for me; I'm glad I saw him!
Dr. John Leung solved skin issues that multiple dermatologists couldn’t. I had been in pain for so long & he listened to everything I had to say & gave me solutions that worked for me. After that he created a timeline of healing for me to solve all of my allergies. He has been so helpful!
Very professional and very friendly. Understood my issue well and provided good recommendations. Great doctor all around.
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.
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.
Really great experience with Dr. Leung re allergy testing. Would definitely recommend. Very thorough and knowledgeable, and he listened and wants to help.
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.
I've seen Dr. Leung for my own issues and have been there with family for their own. He's compassionate, caring, and his entire staff works closely with each other. He has a very good sense of humor and always makes you feel good about any treatment or course of action you may need to take.
Overall great experience. Dr. Leung was very patient explaining EVERYTHING. I asked a ton of quesitons and he answered them all.
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.
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.
I LOVE him! He is very knowledgeable and understanding. I also love how pleasant the receptionist & nurses are... Always smiling & happy to help!
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.
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!
He worked very efficiently. I spent only 30mins and he helped for all my needs
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!
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. .
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.
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.
inspired confidence in me that whatever is going on with my body, we will fix it! loved transparency and efficiency. A+ all around
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.
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
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.
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.
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.
Excellent bedside manner, calm and unhurried.
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.
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.
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.
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.
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.
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.
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.
Great experience except for the wait time in the office.
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!
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.
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.
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.
Dr. Leung was great. He listened, explained things thoroughly, and provided options. I felt I was being well cared for.
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
My visit with Dr. Leung was great! He is very kind and at the same time very professional.
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.
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.
Very good. Very pleased. Always very polite and professional and knows what he is doing.
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
Very prompt, polite and professional. This was my first consultation with him and I am looking forward to learning more about EOE.
Dr Leung and his team are terrific. Very kind and compassionate and offering hope and potential treatments for even those kids with very severe allergies.
Dr. Leung's office is well run and they know what they are doing. Everyone is nice and friendly and efficient. A breath of fresh air compared to a lot of doctor's offices these days!
Very knowledgeable, friendly/down to earth, and spends time explaining everything!
Very good. The only low point was the unwelcoming and very cold secretary that "greeted" me
Really trust Dr. Leung. Honestly consider him one of the best!
Dr. Leung is personable, knowledgeable, and a great communicator.
I have an email extremely rare condition and he is the only one who understands my case. I never feel rushed, he is kind and caring and answers all of your questions. I would highly recommend him.
My appointment with Dr. Leung was probably one of the most productive and informative ones I've ever had. He didn't just tell me what I needed to do about my condition, but really took the time to explain what the cause was in language and visuals that I could easily digest. The nurses in the office were also very helpful and friendly. I definitely recommend him for both allergy and gastro issues.
I thought it was great! He was very knowledgeable and patient with my daughter. The nurses were welcoming and kind.
So glad I found him Very thorough and put together a plan of action to figure out what is wrong with my son
Dr. Leung and all of his staff are fantastic. We were referred to an allergist by our PCP for our almost 1 yr old. When we arrived for our appointment at Tufts Medical Center there was some confusion as to who we were supposed to see. Ultimately we ended up at Dr. Leung's privte practice around the corner from the medical center. We were not in the system at all for Tufts or otherwise. The receptionist was so kind and told us that we could be seen anyway. They fit us in and were so expedient with getting the history and immediately scratch tested our baby. They gave us a script for an epi pen and the pertinent info on how to use it just in case we had any scary reactions between appointments. Dr. Leung paid attention to all the info we gave him and covered all the bases for things we might need for our daughter and the symptoms she was experiencing. Today was our second visit for a good challenge and while we ended up being 30 minutes late because of traffic and parking (we found out that they give an $8 discount for the garage at 40 Beach Street including a $5 check that comes in the form of a check directly from the office-super thoughtful). Despite being late they treated us with kindness and were very attentive. The office was extremely busy while we were there but everyone seemed attended to and Dr. Leung didn't stop making rounds and checking in. After so many terrible experiences at doctors offices and hospitals who seem not to care if you have a good experience I can't say enough about Dr. Leung. It definitely takes the stress out of the process of allergy testing.
I cannot say enough about the Tufts pediatric doctors. The staff was very nice on the phone, and found an appointment that was fairly quick. We've been to many doctors, but Dr. Leung is the first to diagnose the problems my son is having. He was great explaining to us exactly what was going on, why, and how to help. I highly recommend.
Professional, quick, and thorough. Was let in right at my appointment time, definitely recommend.
The wait was behind schedule so a few points knocked off for that. However his demeanor, bedside manner and explaining what the next steps were with my diagnosis more than made up for it. Absolutely worth the wait, just be sure to allocate a decent chunk of time. For some reason they did have my info via ZocDoc but they still called me for my address and name. Very odd.
Dr. Leung is excellent. He explained everything very clearly, isn't pushy at all and really wants his patients to understand their options and lets them make their own decisions.
Dr. Leung and his team were prompt, clear, and communicative. They listened to my symptoms and questions, and provided a lot of clear information on how to manage my symptoms. All doctor visits should be more like this.
He is a very thorough doctor and we always get the answers we need.
Very professional - would recommend him to anyone.
John, is such a great doctor, so much energy and passion and he's one of the best in his specialty!
The visit went very well the only thing was that the nurse who took my son's vitals the very last time left him unattended on the high up table to go speak with another person right out side the door luckily my uncle was with me and stairs with him so he did not fall as I was making another appointment
Wonderful doctor; very personable and thorough.