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Ryan J Sullivan

Ryan J Sullivan, MD

Medical Oncology

Highlights

Age Groups Seen

  • Adults
  • Geriatrics

Languages

  • English

Gender

Male

Locations

  1. Mass General Brigham Cancer Institute Medical Oncology Clinic at Newton
  2. Mass General Brigham Cancer Institute Melanoma and Pigmented Lesion Center at Boston
    • 32 Fruit Street, Yawkey Building, 7th Floor, Suite 7e, Boston, MA 02114
    • Get Directions

Expertise

Education

  • Fellowship: Beth Israel Deaconess Hospital, Hematology-Oncology, 2009
  • Residency: Mount Auburn Hospital, Internal Medicine - Chief Resident, 2005
  • Residency: Mount Auburn Hospital, Internal Medicine, 2004
  • Internship: Mount Auburn Hospital, Internal Medicine, 2002
  • Medical Education: University of Connecticut School of Medicine, 2001

Board Certifications

  • Internal Medicine: American Board of Internal Medicine, 2009

Insurance

Search plans
  • Aetna
  • Beech Street
  • Blue Cross Blue Shield
  • Blue Cross Blue Shield - Indemnity
  • Blue Cross Blue Shield Medicare
  • Cigna
  • Commonwealth Care Alliance
  • Coventry
  • Fallon Health
  • Harvard Pilgrim Health Care
  • Humana
  • Maine Community Health Options
  • Mass General Brigham Health Plan
  • MassHealth
  • Medicaid CT
  • Medicaid ME
  • Medicaid NH
  • 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

5 out of 5

122 ratings, 64 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 4/1/2026

    Couldn't be better

  • Reviewed on 3/25/2026

    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.

  • Reviewed on 3/24/2026

    Caring, attentive. Pleasant.

  • Reviewed on 3/19/2026

    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.

  • Reviewed on 3/16/2026

    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

  • Reviewed on 3/12/2026

    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.

  • Reviewed on 3/9/2026

    Dr. Ryan Sullivan is excellent!

  • Reviewed on 3/9/2026

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

  • Reviewed on 3/4/2026

    Absolute best!

  • Reviewed on 2/20/2026

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

  • Reviewed on 2/17/2026

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

  • Reviewed on 2/16/2026

    Always professional, friendly and courteous.

  • Reviewed on 2/26/2026

    Wonderful care and it was very quick

  • Reviewed on 2/26/2026

    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.

  • Reviewed on 1/27/2026

    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.

  • Reviewed on 1/29/2026

    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.

  • Reviewed on 1/22/2026

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

  • Reviewed on 1/21/2026

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

  • Reviewed on 1/19/2026

    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

  • Reviewed on 1/15/2026

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

  • Reviewed on 1/15/2026

    Dr Sullivan is the best. Personable. Upbeat.

  • Reviewed on 1/14/2026

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

  • Reviewed on 1/11/2026

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

  • Reviewed on 1/7/2026

    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.

  • Reviewed on 12/29/2025

    Excellent

  • Reviewed on 12/28/2025

    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.

  • Reviewed on 12/24/2025

    Always'a pleasure to see him

  • Reviewed on 12/24/2025

    He is the best!!!

  • Reviewed on 12/16/2025

    He listens and shows up interest.

  • Reviewed on 12/16/2025

    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.

  • Reviewed on 12/17/2025

    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.

  • Reviewed on 11/17/2025

    The visit was great.

  • Reviewed on 11/17/2025

    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.

  • Reviewed on 11/17/2025

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

  • Reviewed on 10/16/2025

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

  • Reviewed on 10/15/2025

    The best ever

  • Reviewed on 10/13/2025

    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.

  • Reviewed on 10/8/2025

    Excellent

  • Reviewed on 9/25/2025

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

  • Reviewed on 9/19/2025

    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.

  • Reviewed on 9/17/2025

    Exceptional service

  • Reviewed on 9/10/2025

    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.

  • Reviewed on 9/10/2025

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

  • Reviewed on 9/4/2025

    Dr. Ryan Sullivan is awesome!

  • Reviewed on 8/29/2025

    excellent

  • Reviewed on 8/27/2025

    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...

  • Reviewed on 8/21/2025

    I have followed confidence in Dr. Sullivan.

  • Reviewed on 8/13/2025

    Dr Sullivan was kind and reassuring (and smart)

  • Reviewed on 8/14/2025

    Dr. Sullivan is professional and personable. I feel so fortunate to be one of his patients.

  • Reviewed on 7/25/2025

    I am on a five-year surveillance for a melanoma in my eye. Dr. Sullivan has always been very consistent, very communicative, and if I have any questions, he answers them as well as there can be an answer. I'm very pleased with my care overall.

  • Reviewed on 7/25/2025

    I would like to say that Dr. Sullivan is very competent, compassionate, and he's a wonderful doctor and a great asset to Mass General Hospital.

  • Reviewed on 7/19/2025

    Very caring & easy to communicate with.

  • Reviewed on 7/16/2025

    First time visit and i was very impressed and pleased.

  • Reviewed on 7/18/2025

    Excellent

  • Reviewed on 7/7/2025

    This was my first meeting with Dr. Sullivan and he is as nice, kind and intelligent as his colleagues said he is. I am most comfortable and happy having Dr. Sullivan as oncologist

  • Reviewed on 7/4/2025

    Dr. Sullivan spent a great deal of time explaining the nature of my cancer, the various therapies available, and the thinking that informed his recommendations. He is very pleasant, very smart, and inspires enormous confidence.

  • Reviewed on 7/2/2025

    I've always been totally satisfied with the care that I've been given over the past 12 years. I would highly recommend Dr Sullivan.

  • Reviewed on 6/27/2025

    Everything went fine as usual.

  • Reviewed on 6/23/2025

    Very professional and personable!

  • Reviewed on 6/21/2025

    Knowledgeable, honest, and knew my case and history when I saw him for the first time. Good experience.

  • Reviewed on 6/19/2025

    Yes, my response about Dr. Ryan Sullivan is he is definitely an asset to the hospital. He is an outstanding doctor and I like him very much and I trust him with my life.

  • Reviewed on 6/6/2025

    Dr. Sullivan was great, very informative. Our goal in coming to Mass General was to try and find a trial. Unfortunately, Mass General didn't have anything at that time that we fit into, but I was just strictly looking for oncologists. I would definitely sign him up. Thank you.

  • Reviewed on 5/28/2025

    Dr. Sullivan is very understanding and explains things completely. He spends time and listens to my concerns. He takes the time to listen. And gives me the opportunity to ask any questions

  • Reviewed on 5/29/2025

    Dr. Sullivan was really nice and he listened to everything I had to say. And all the nurses and stuff were nice too.