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John J McGrath

John J McGrath, MD

Radiation Oncology

Highlights

Age Groups Seen

  • Adults
  • Geriatrics

Languages

  • English

Gender

Male

Locations

  1. Mass General Brigham Cancer Institute Radiation Oncology Clinic at Emerson
  2. Cooley Dickinson Medical Group, Radiation Oncology

Expertise

Education

  • Residency: Tufts Medical Center, Radiation Oncology, 1998
  • Internship: Brigham and Women's Faulkner Hospital, Transitional, 1994
  • Medical Education: University of Vermont College of Medicine, Medicine, 1993

Board Certifications

  • Radiation Oncology: American Board of Radiology, 1998

Insurance

Search plans
  • Aetna
  • Beech Street
  • Blue Cross Blue Shield
  • Blue Cross Blue Shield Medicare
  • Cigna
  • Commonwealth Care Alliance
  • ConnectiCare
  • Coventry
  • Fallon Health
  • Harvard Pilgrim Health Care
  • Health New England
  • Humana
  • Maine Community Health Options
  • Mass General Brigham Health Plan
  • MassHealth
  • Medicaid CT
  • Medicaid ME
  • Medicaid NH
  • Medicaid NY
  • Medicaid RI
  • Medicaid VT
  • Medicare
  • Medicare ACO
  • Multiplan
  • Railroad Medicare
  • Senior Whole Health
  • TriCare
  • Tufts Health Plan
  • Tufts Medicare Preferred
  • United Health Care
  • Wellpoint
  • WellSense
  • WellSense NH

Ratings & Reviews

4.9 out of 5

187 ratings, 87 reviews

The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.

Search reviews
  • Reviewed on 3/19/2026

    Dr McGrath is fantastic! I can't say enough good things about him. He's the BEST!

  • Reviewed on 3/14/2026

    Happy to get a second opinion from an expert in the field

  • Reviewed on 3/12/2026

    Yes, I just wanted to say that Dr. McGrath is unbelievably fantastic. Best doctor, one of the best doctors I've ever had. He shows, he's caring and he really values what I have to say and he really, he's a truly great human being and I'm so lucky to have him as a doctor.

  • Reviewed on 3/5/2026

    I feel so grateful to have received care from Dr. McGrath. He possesses that wonderful combination of intelligence, competency and genuine warmth. Thank you John!

  • Reviewed on 3/5/2026

    I like Dr. McGrath's warm personality, his knowledge and the way he explains things so that they are easy to understand, and his willingness to listen to questions.

  • Reviewed on 3/4/2026

    Dr McGrath is very proficient, a great communicator and listens extremely well and takes appropriate actions. I am very comfortable with Dr.McGrath's communications and expertise.

  • Reviewed on 3/4/2026

    Everything was good. I have nothing else to say.

  • Reviewed on 2/27/2026

    Dr. McGrath was warm and easy to talk to. He made everything seem simple and that he knew what he was doing. I felt like I'm in very good hands with him and all the providers at this office.

  • Reviewed on 2/25/2026

    The care provider is knowledgeable, sensitive to how I was feeling, and gave me information as well as instructions with clarity

  • Reviewed on 2/25/2026

    Dr. McGrath was exceptional, wonderful bedside manner, getting a diagnosis of cancer was very nerve-wracking. He made me feel very calm, answered every single question I had, took his time. I can't say enough about this doctor. He was excellent.

  • Reviewed on 2/18/2026

    Excellent, intelligent, professional, pleasant, all the above.

  • Reviewed on 2/17/2026

    he explained everything in detail .

  • Reviewed on 2/27/2026

    Good experience

  • Reviewed on 2/9/2026

    I loved his flexibility with my appointment time, especially given the weather.

  • Reviewed on 2/9/2026

    Dr. McGrath's comments were helpful to my continued recovery.

  • Reviewed on 1/31/2026

    Dr. McGrath and team make it a very pleasurable experience

  • Reviewed on 1/23/2026

    I am appreciative that I am able to be in the care of Dr McGrath and his staff. They are all top notch!

  • Reviewed on 12/31/2025

    Dr. McGrath is an exceptional doctor. He put me at ease immediately with his kind and friendly manner. He explained everything in a way I could understand and reassured me things would go smoothly. [redacted] All in all, a great experience!

  • Reviewed on 12/31/2025

    Dr is outstanding with knowledge and covers every question with. Great detail.The facility is modern and spotless.extremely satisfied with MGH .

  • Reviewed on 12/24/2025

    Such an easy experience.

  • Reviewed on 12/24/2025

    So far kit was great!!!

  • Reviewed on 12/24/2025

    Yes, all the individuals that I interacted with from receptionists, nurses, doctors were wonderful, very nice, very attentive, listened well, and I really appreciate all of it. Thank you.

  • Reviewed on 12/20/2025

    My pretreatment was excellent, but radiation was not performed, it has been postponed to ?

  • Reviewed on 12/21/2025

    nice and easy

  • Reviewed on 12/18/2025

    Last spring 27 of 28 radiation treatments were on time an amazing job for any appointment even more amazing for a medical facility

  • Reviewed on 12/16/2025

    Dr McGrath is the absolute BEST!!! The staff is always so nice and helpful.

  • Reviewed on 12/16/2025

    Dr. McGrath has been outstanding. He really listens to concerns and takes patients experiences into consideration when making recommendations. I have seen many doctors as part of my cancer treatment and he stands out as a kind, compassionate, and skilled physician.

  • Reviewed on 8/26/2025

    Very comfortable with him.

  • Reviewed on 8/27/2025

    Dr. McGrath had a great bedside manner, if you will, and listened carefully, explained all my options, and was a nice guy on top of it. So I enjoyed my time with him.

  • Reviewed on 8/13/2025

    Explained options for therapy very well

  • Reviewed on 8/17/2025

    This was a yearly follow up after cancer treatment. During my original treatment, Dr McGrath was very informative, answered all our questions in detail, and was extremely kind and reassuring. This was my final visit, and it was a pleasure to see him again. I'd recommend him without hesitation.

  • Reviewed on 8/14/2025

    Dr. McGrath is well experienced & extremely knowledgable. His thorough & detailed description of my diagnosis & therapy options was excellent.

  • Reviewed on 8/13/2025

    My first experience with John was very positive. As we move through the process for planning my treatment, I am hopeful all communications will remain timely, professional, and caring.

  • Reviewed on 8/10/2025

    A very kind and caring person that I consider to be family and would recomend to anyone in need of these treatments.

  • Reviewed on 8/7/2025

    This provider made time for my appointment which was changed to allow him to see my MRI. He was not aware of it until I mentioned it. He then reviewed the normal results which was gratifying. He also wrote the prescription I requested.

  • Reviewed on 8/6/2025

    Dr. McGrath is the best doctor I have ever seen. He is compassionate yet straight forward. He explains everything & always answers all of my questions.

  • Reviewed on 8/8/2025

    Dr McGarth was thorough in explaining my cancer and possible treatment. He was professional. He answered questions throughout the discussion. His nurse and staff put me at ease.

  • Reviewed on 8/6/2025

    Dr. McGrath is a wonderful doctor who always takes the time to listen and is very knowledgeable and respectful.

  • Reviewed on 8/6/2025

    Dr. McGrath was an amazingly caring and kind doctor, great manner, great and willing to listen to questions and answer anything. In fact, he actually requested that I ask lots of questions. Loved how he drew pictures and wrote things down for me, so it was easy to remember. I'm also a visual learner. Overall, just loved his personality and his kindness, and his nurse was amazing too.

  • Reviewed on 8/3/2025

    Dr McGrath is also so kind and really listen to me.

  • Reviewed on 8/1/2025

    Thank you so much for all your care and dedication So far i always was treated with respect great way. Its always nice experience visiting this office.

  • Reviewed on 8/1/2025

    I thought Dr. McGrath was excellent. I thought his team was excellent. He took a tremendous amount of time to explain things to my husband and myself. He clearly read my file. He explained things by using pictures, by drawing things, by answering our questions. He was incredibly thorough and he was also just very lovely and kind.

  • Reviewed on 7/31/2025

    Felt very comfortable with the Dr and gained my respect

  • Reviewed on 7/30/2025

    Very courteous and friendly

  • Reviewed on 8/1/2025

    Yes, we are very pleased with Dr. McGrath. I have been there for a number of years now, and I think we are most fortunate to have this caliber of doctor available in this area. Thank you.

  • Reviewed on 7/31/2025

    World class

  • Reviewed on 7/31/2025

    I am so happy that got Dr. McGrath for my doctor .

  • Reviewed on 7/28/2025

    Dr. McGrath was helpful and pleasant. I felt very comfortable with his recommendations.

  • Reviewed on 7/28/2025

    Dr McGrath was very personable and professional . I felt very comfortable in his care and am looking forward to my treatments.

  • Reviewed on 7/27/2025

    dr mcgrath has been my cancer doctor for many years and has always taken care of me or my concern

  • Reviewed on 7/27/2025

    Dr.Mcgrath is an exceptional Dr. Very knowledgeable and caring. Not enough room here for all the positive things I can say about him.

  • Reviewed on 7/24/2025

    Dr. McGrath has been so compassionate during my CA treatment. His attitude that we can beat this has kept my spirits high throughtout.

  • Reviewed on 7/24/2025

    Dr. McGrath shows compassion and is very caring of his patients. Very thorough in explaining the cancer diagnosis and the treatment. He can draw upside down ... lol! He reminds you he and his staff are here for you. Not to hesitate to call with any concerns or questions.

  • Reviewed on 7/21/2025

    Aside from being professional he was also personable - made me feel comfortable

  • Reviewed on 7/20/2025

    Caring. Attentive.

  • Reviewed on 7/8/2025

    Emphatically clear conversation and coverage of potential outcomes

  • Reviewed on 7/6/2025

    Dr McGrath is the consummate professional! His questions are on point and the information he provided was clear and well thought out.

  • Reviewed on 7/4/2025

    Dr. McGrath was patient, was kind, took time to explain everything, constantly asked if I had any questions, and was very reassuring.

  • Reviewed on 7/2/2025

    Very pleasant.

  • Reviewed on 7/2/2025

    Dr. McGrath explained things in a way that was easily understandable, and answered all my questions fully.

  • Reviewed on 7/1/2025

    Dr. Mcgrath is the best! Thank you!!!!!

  • Reviewed on 6/30/2025

    He put me at ease and explained everything

  • Reviewed on 6/30/2025

    Dr McGrath was wonderful

  • Reviewed on 6/29/2025

    Dr. McGrath is the finest physician I have ever known and I feel so fortunate to be under his care. He is not only a brilliant doctor, he is so kind and truly cares for his patients. I remember when I was first diagnosed with breast cancer and was beginning my radiation treatment I was very nervous to meet my radiation oncologist and as soon as Dr. McGrath walked in the room he put me at ease with his caring demeanor. Mass General Brigham is extremely fortunate to have Dr. McGrath on your staff.

  • Reviewed on 6/26/2025

    Dr McGrath is an excellent Dr and has a great personality. He makes his patients feel relaxed and optimistic for their future.

  • Reviewed on 6/25/2025

    I absolutely loved the provider and all of his staff. I was very upset/concerned about my breast cancer diagnosis and left there confident in the care I was receiving. I cannot say enough about that whole office and staff.

  • Reviewed on 6/25/2025

    He and office and nurses were fantastic

  • Reviewed on 6/22/2025

    My experience with "Doctor Jack" has always been very fine.

  • Reviewed on 6/21/2025

    Very caring.

  • Reviewed on 6/20/2025

    Is that recording now? I feel fortunate to have Dr. McGrath as my doctor and I'm confident in my outcome of my cancer. Thank you.

  • Reviewed on 6/18/2025

    He knew my history, took ample time talking with me and explaining my medical situation. He was also very cordial and reassuring.

  • Reviewed on 6/17/2025

    This is a stressful time....being diagnosed with prostate cancer. Dr. McGrath put me at ease with the treatment options. I know he sees hundreds of patients, but he seemed genuinely interested in my care.

  • Reviewed on 6/18/2025

    My experience with Dr. McGrath and all of his staff was nothing but positive. I felt listened to, I felt supported, and I was encouraged to power through the treatment in order to eliminate cancer, which it was.

  • Reviewed on 6/17/2025

    The physician and his staff do an excellent job ... they are knowledgeable, caring and professional.

  • Reviewed on 6/16/2025

    Dr. McGrath was kind, caring and listened to everything I had to say. I felt heard and seen. I can't say enough wonderful things about Mass General Cancer Center at Emerson Hospital.

  • Reviewed on 6/13/2025

    I've had a wonderful experience with my cancer. All the doctors I saw and nurses were very courteous and polite. They told me whatever I asked them and they were just so kind to me. And I can't say enough about them. I am very happy with them, all of them, and all of the doctors too.

  • Reviewed on 6/13/2025

    Dr McGrath is totally engaged with my care. He's experienced, knowledgeable, personable, an excellent provider!

  • Reviewed on 6/12/2025

    Dr. McGrath was very friendly with positive energy. He spoke very clearly and explained the health issue with me in easy to understand terms. Highly recommend Dr. McGrath.

  • Reviewed on 6/11/2025

    I have great respect and trust for Dr McGrath and the staff throughout my pre and post oncology experiences always pleasant professional and thorough

  • Reviewed on 6/13/2025

    Dr McGrath was warm, kind, explained everything about my cancer treatment plan. I felt very assured that I was in good hands.

  • Reviewed on 6/11/2025

    The whole office seems to function as a warm and supportive team. I believe they have my best interests at heart and truly care that I am comfortable before during an after treatment. Every visit felt like a warm hug.

  • Reviewed on 6/13/2025

    Dr. McGrath was respectful, courteous and highly professional. He listened to my concerns and gave me a thorough examination. He made a testing recommendation based on his findings. I'm looking forward to working with him in the future.

  • Reviewed on 6/6/2025

    Dr. McGrath ended up explaining everything to me. He checked my background. I was very impressed because he understood what I was telling him, my concerns. So I was very satisfied and I'm so grateful to have good doctors on my side.

  • Reviewed on 6/6/2025

    I absolutely love Dr. McGrath. He is a wonderful doctor with excellent bedside manner. Some doctors have a tendency of being pretentious or being the smartest guy in the room and Dr. McGrath is very personable and it's not like that at all. He doesn't talk at you. He talks to you and with you. I would recommend him a thousand percent to anybody.

  • Reviewed on 6/6/2025

    Dr. McGrath was wonderful. I give him an A+. It was a very helpful experience. He took the time. I also want to thank the receptionist who was very helpful. And there was a nurse there that did take some things, and I forgot to mention that the nurse was also excellent. So everyone, extraordinary, thankful. I'm so, I'm very thankful. Great gratitude for this wonderful care. Goodbye. Thank you.

  • Reviewed on 6/6/2025

    It was a very positive experience. The doctor explained what treatment he was going to recommend, what was going to be important about after the surgery, whether or not I needed radiation. And he listened to me talk about my expectations. So it was very positive.

  • Reviewed on 6/6/2025

    No, Dr. Mcgrath was very good. He's the best doctor I ever had. I might have answered the first few questions wrong because I don't like talking to machines.