Jonathan B Greer, MD

Patient Feedback

4.942308 average rating from 104 reviews

• Very professional. Very knowledgeable. Very likable.

  2026-09-30

• I was very concerned when I was informed a meeting needed to be scheduled with the Oncology Department for me. That was one thing I was hoping I would never hear. It's been a roller coaster of emotions since. I must say that Dr. Greer had a very calming demeanor, however, I don't know how much information I grasped as my mind was all over the place I did not go to MGH for an Oncology appointment. I went to meet with a doctor to discuss inguinal hernias that showed up in a recent MRI.

  2026-10-03

• It was very good

  2026-09-19

• It was a short visit with "the team". He explained what will be done this Tuesday. He will get the results and move on from there.

  2026-09-13

• Mass General does a phenomenal job and we are so grateful to be patients there

  2026-08-31

• Everyone was very polite and took tome explaining.

  2026-08-31

• Very good health care

  2026-08-29

• Dr. Greer and his entire team were all extremely helpful and friendly, which helped me to feel more relaxed.

  2026-08-05

• Dr Greer, great Dr.

  2026-08-02

• He spoke in terms that were easily understood by someone not familiar with this process. He was very thorough, had very good bedside manner, and was very reassuring and had a good game plan.

  2026-07-18

• Dr Greer is a new doctor for me but I was pleased with our conversation.

  2026-07-12

• Dr Greer was very patient and took the time we needed to talk with us and answer all our questions.

  2026-07-11

• He was very good, very thorough, and very helpful in making a plan. [redacted]

  2026-07-08

• I feel fortunate that I live so close to an excellent hospital that has a wonderful doctor with understanding of my unusual condition.

  2026-07-05

• Dr Greer is an excellent doctor; this is my second MAJOR Surgery ( the hipec) from him. I expect nothing less than excellent results

  2026-07-04

• Dr Greer was very thorough in explaining the issues to me. I was grateful for his communication skills.

  2026-06-26

• He's an excellent professional doctor. He's easy to understand and very, very knowledgeable.

  2026-06-22

• Dr Greer was professional caring in he listened. He knew everything about me when he sat down. Hw explained what he wanted to as far as procedures were concerned. Very good experience with Dr Greer

  2026-06-22

• I saw Dr. Greer who was very open to meeting with us, my family, and extremely courteous and had all of the answers to all of our questions and was very thorough on the care.

  2026-06-16

• All my appointments since were on time. I was treated with the utmost respect.

  2026-06-13

• Dr. Greer is always generous with his time. I remain grateful to him for the lifesaving surgery he performed one year ago. He provided some honest advice concerning a medical issue I have now.

  2026-06-13

• Dr. Greer was well informed about my complex health history, he had clearly had reviewed my extensive, overwhelming "chart". Having this understanding was very reassuring and helpful to our discussion about treatment options.

  2026-05-22

• Me and my family believe that Dr. Greer is an angel, an angel. He is such a professional, informative, kind-hearted, just overall good human being, care provider, and I would honestly trust him with my life, and I have in the past. He means the world to me and our family because of how generous he always is at this time. He just is such a wonderful person and such an incredible doctor. So yes, I would recommend him to all of my friends and my family if ever needed. And I speak very, very highly of him to all friends and family. I very much appreciate Dr. Greer, all the nurses, everybody that drew my blood. Everything was very, very well done. The people that took my MRI were also great.

  2026-05-04

• The provider was thorough with telling me his notes on what was going on. He also listened and answered questions for us to help clarify our questions. Overall, this was a good experience [redacted]

  2026-05-04

• Dr. Greer was very calm, professional, and kind. He explained everything and made sure that I understood. You could tell he was a caring individual, even though I was kept waiting quite a bit. He called me as soon as he was free. He called me himself and he apologized profusely. I have no issues with things running late. They have happened to me before. And so that's fine as long as you acknowledge it. But I would definitely recommend this Dr. Greer to anyone. Thank you.

  2026-04-20

• Dr. Greer was fully prepared with my medical history. He showed and explained the result of my CT thoroughly. Very understanding.

  2026-04-11

• superb experience

  2026-04-05

• Dr Greer is a gift. One of the most caring physicians I have known and even comes with a great humor.... An extra blessing. [redacted]

  2026-04-04

• Excellent in making us feel comfortable and understanding of our concerns. Very grateful for this experience.

  2026-03-28

• He explained complicated issues in simple terms

  2026-04-03

• Dr. Greer was excellent from the moment I met him with all his explanations and the entire process of working with him for my health just has been wonderful.

  2026-03-30

• I have great respect for Dr. Greer. He is so focused on the whole person. If I need surgery in the future, I would follow him anywhere.

  2026-03-28

• Dr. Greer has been fantastic!!

  2026-03-28

• Excellent

  2026-03-26

• [redacted] Dr. [redacted] left big shoes to fill when he retired, [redacted]. Dr. Greer has been the best at filling those shoes and I am happy. He is competent, knowledgeable, with incredible bedside manners and patience while explaining updated follow up results and what is expected in the future. [redacted]

  2026-03-24

• Dr Greer was extremely nice and down to earth. He explained everything to me in a professional and understanding manner.

  2026-03-02

• Dr. Greer was wonderful - very informed and informative.

  2026-02-28

• The doctor provided me with all aspects of my medical care

  2026-02-19

• Dr. Greer was on time; very approachable; listened to my concerns and provided the answers I was looking for.

  2026-02-16

• Overall positive - I am looking forward to fast turn around on next steps

  2026-02-09

• I found Dr. Greer to be very pleasant and knowledgeable and the meeting that I had with him, he answered all of my questions and I feel like he is a great doctor.

  2026-02-09

• Excellent doctor, very knowledgeable and kind. Thank him for his great service and guidance.

  2026-02-02

• Great professionals

  2026-02-01

• I felt very well cared for and lucky to have Dr Greer as my advisor!

  2026-02-01

• Caring, competent and hard working

  2026-01-11

• Dr. Greer was kind, compassionate and made me feel so much better. His positivity helped me so much!

  2025-12-29

• Dr. Greer is excellent in all ways.

  2025-12-18

• Dr Greer is a kind, compassionate doctor. Unfortunately, he was unable to provide Pipac procedure or give me assurance that going to another hospital to receive this clinical trial might help. Not his fault, I guess this is the way of clinical trials. I was just hoping that someone might say "yes this is a procedure for you." Do I just wait for chemo to stop working ? I wish the MGH team might collaborate more and come up with ideas for us terminal appendiceal patients. I don't want to just wait to die.

  2025-12-12

• I was very impressed with the way Dr. Greer and Dr. [redacted] talked to me and tried to explain things. [redacted] I'm happy with what they had to say to me. Some things I understood, some things I didn't, but they did explain things. [redacted]

  2025-12-11

• He was very positive and friendly

  2025-12-07

• Best hospital to be in.

  2025-12-01

• He was very caring and understanding and a pleasure to talk to I am glad that I now have him as a doctor

  2025-11-23

• Feel very grateful to have had Dr. Greer Not only is he extremely skilled as a surgeon, he excels at making personal contact, clearly explaining and coordinating the process. I am beyond grateful and confident that I had the very best care possible.

  2025-11-19