Ryan J Sullivan, MD

Patient Feedback

4.954198 average rating from 131 reviews

• Dr. Sullivan is the best. He has an excellent communication style. You can tell that he is highly intelligent, but completely relatable.

  2026-07-08

• I have been seeing Dr Sullivan for the past 10 Yrars. I wouldn't change a thing. Totally satisfied.

  2026-07-02

• I have been seeing Dr. Ryan Sullivan for the last 3 to 4 years. He has made my visits very pleasant and reassuring. I am 13 years out from a melanoma and we both decided that the visits were no longer needed. Dr. Sullivan made it perfectly clear to me that he is there for me if anything changes just be in touch.

  2026-06-30

• Dr Sullivan is professional but approachable and definitely puts his patients at ease. [redacted]

  2026-07-01

• I have been treated by Dr. Sullivan since 2004, and he has led my cancer treatment team with great dedication and professionalism. He is honest about potential options for treatment and, importantly, about the limits of our present options for treating metastatic melanoma. He is patient, empathetic, and a real asset to Mass General.

  2026-06-25

• Great personal assistance.

  2026-06-14

• All was good as I would expect

  2026-05-26

• Dr Ryan Sullivan is the best doctor I've ever had!

  2026-05-19

• I feel very confident with the care I am getting.

  2026-05-13

• Dr. Sullivan has overseen my care since brain surgery for a stage IV malignant melanoma tumor, back in [redacted]. He has been a wonderful doctor and person to work with throughout all of this long journey.

  2026-05-08

• Dr. Sullivan is competent, very excellent, very personal.

  2026-05-07

• Very respectful, explains what's going on, discusses tests & listens to my concerns.

  2026-05-06

• I am truly blessed to be a patient at MGH. Dr. Ryan Sullivan is the best Oncologist. I definitely give him credit for saving my life after having Melanoma twice. The treatment he recommended was successful. He has been totally responsive to me whenever I have been in touch with him. I meet with him on a regular basis after scans and bloodwork. Everyone I come in contact with when I walk in the door at Yawkey Cancer Center is respectful and so nice. MGH is the best hospital.

  2026-05-04

• Dr. Sullivan was extremely helpful in helping me understand the current state of medical care for my disease stage and what my likely options will be going forward.

  2026-05-04

• Dr. Sullivan is the best.

  2026-05-04

• Dr Sullivan has treated me for 10 years now and he is just an amazing Dr, he's smart and connected throughout the MGB system. My Wife and I love him!

  2026-04-30

• Awesome

  2026-04-15

• It was a very acceptable experience. Nothing really special, nothing really negative. It was a very special thing. If I had to give it a mark from, let's say 1 to 10, I'd say it was a solid 8. Thank you.

  2026-04-09

• I am encouraged that this provider will "be there" for me, should there ever be a turn for the worse in my status or condition.

  2026-04-08

• Couldn't be better

  2026-04-01

• Dr Sullivan is a kind, caring physician who explains what I need to know. Possible cancer is scary and he has helpful way of explanations and what we need to do next.

  2026-03-25

• Caring, attentive. Pleasant.

  2026-03-24

• This provider, Dr. Ryan Sullivan, is by far one of the greatest physicians and human beings I've ever had the fortune to be treated by.

  2026-03-19

• Dr Sullivan and his team are simply the best. I am alive because of him. Thank you to all of my amazing Drs and their staff

  2026-03-16

• Dr. Sullivan is a good guy, great doctor, always makes me feel like I have plenty of time. I do think that, you know, sure, it takes some time sometimes for him to come into the room, but when he is in the room with me, I never feel rushed. I feel like he's very interested in my life, not just in terms of my health and cancer, but outside of that, too. You know, he wants to know how I'm doing and I've shown him videos of, you know, of different activities I do outside of work and just family things and he listens and wants and takes interest in that and it's builds trust and I appreciate that. Thanks.

  2026-03-12

• Dr. Ryan Sullivan is excellent!

  2026-03-09

• Dr Sullivan always takes the time with me and listens to my concerns

  2026-03-09

• Absolute best!

  2026-03-04

• Dr. Sullivan has been careful, focused, studying, very expert in helping me, and I highly recommend him. He's been just great.

  2026-02-20

• Dr Sullivan is the most thorough doctor I have ever seen. He listens carefully and gives his expert advice in ways I can understand

  2026-02-17

• Always professional, friendly and courteous.

  2026-02-16

• Wonderful care and it was very quick

  2026-02-26

• Dr, Sullivan is an excellent doctor and I have the utmost respect for him. He comes to the appointment well prepared, listens to me, explains things to me in a kind way. He is great.

  2026-02-26

• Dr. Sullivan treats the whole person, not just the specific condition. He listens well and when issues arise acts quickly to get me the care that I need.

  2026-01-27

• Doctor Sullivan has been great over the past ten years. My visits are now unnecessary. I will miss him but am grateful that the melanoma treatment and watch is over.

  2026-01-29

• Dr Sullivan is a consummate professional who is skilled and knowledgeable. He is easy to talk to and tells it to you straight.

  2026-01-22

• Very good experience. Attending, fellow, and medical student, all interested in me! Plenty of time to talk.

  2026-01-21

• Dr. Sullivan and his fellow were incredibly kind, knowledgeable, patient, and excellent listeners. Gave me confidence moving forward with a difficult diagnosis. You are fortunate to have such talent in your organization

  2026-01-19

• Dr Sullivan is always respectful and kind each time I have seen him.

  2026-01-15

• Dr Sullivan is the best. Personable. Upbeat.

  2026-01-15

• Dr. Sullivan is highly confident and very compassionate. I am grateful to have him as the physician in charge of my immunotherapy.

  2026-01-14

• My experience with Dr. Sullivan and Mass General are always friendly and professional

  2026-01-11

• Dr.Sullivan has always provided quality care regarding my treatment. He discusses in detail and in an understandable manner all aspects of my treatment .He always puts my care first.

  2026-01-07

• Excellent

  2025-12-29

• Yeah, I just want to talk to you about Dr. Ryan Sullivan and my medical mass general in the oncology department. His exceptional skill and compassion made a profound difference during a difficult time in my health care journey. I experienced in my health challenges with a lot of anxiety and discomfort. When I came to Dr. Sullivan's, I felt frustrated and anxious and exhausted. He stood out immediately by sitting down with me, making eye contact and listening intently to all my concerns without rushing me, ensuring me that I felt heard and veiled as an individual. He took the time to explain my diagnosis and treatment options if I needed and then just estimated diagrams and materials that he could point me in the right direction.

  2025-12-28

• Always'a pleasure to see him

  2025-12-24

• He is the best!!!

  2025-12-24

• He listens and shows up interest.

  2025-12-16

• I have seen Dr. Sullivan for the last 2 years,, and he has clearly explained all of the options for my cancer treatment and presented options for me as well as giving his own recommendations. Now we enter year 3 of treatment, and I am very satisfied with Dr. Sullivan's professionalism and the various treatments we have performed, which have had a beneficial effect on my liver, specifically.

  2025-12-16

• Dr. Sullivan is the most knowledgeable, kind, wonderful doctor who always seems to manage to make me walk out of the office feeling hopeful and I think the world of him.

  2025-12-17

• The visit was great.

  2025-11-17

• The provider was great. Unfortunately, the office did not get my brain MRI pushed to the system before my visit, so there really wasn't anything much that could be said at the visit. [redacted] Dr. Sullivan did the best he could with very limited information. [redacted] It was a very unfortunate situation.

  2025-11-17

• The appointment was over the phone. Provider called on time and had/provided all necessary information for the appointment.

  2025-11-17

• Dr. Sullivan is an excellent provider, and I highly recommend him. I have been seeing him for five years. He's terrific.

  2025-10-16

• The best ever

  2025-10-15

• Dr. Sullivan is an outstanding care provider. He is very knowledgeable, extremely patient and caring, and an active and empathetic listener throughout my appointments with him. I highly recommend Dr. Sullivan to anyone who is needing care for melanoma.

  2025-10-13

• Excellent

  2025-10-08

• I believe I am getting great care from both the provider and the center.

  2025-09-25

• I thought he was very good, very friendly. I liked him a lot. He was very knowledgeable. And I would recommend anybody to go see him.

  2025-09-19

• Exceptional service

  2025-09-17

• Dr. Sullivan was well informed about the circumstances of my visit and had clearly considered a number of options with respect to my future care. He listened carefully to what I had to say and provided thoughtful and informed answers to my questions.

  2025-09-10

• Dr. Sullivan and his team are truly the best I've ever had!

  2025-09-10

• Dr. Ryan Sullivan is awesome!

  2025-09-04

• excellent

  2025-08-29

• I was very pleased with my interface with Dr Sullivan....he understood my situation and made me feel comfortable that I was in good hands...and was very knowledgeable and very good communication skills...

  2025-08-27

• I have followed confidence in Dr. Sullivan.

  2025-08-21