Haley Ellis, MD
Not currently accepting new patients
4.940594 average rating from 101 patient reviews
Specialties
Affiliation
Mass General Brigham
Provider Locations
- Boston, MA
Dr. Ellis is a medical oncologist at Massachusetts General Hospital and Instructor in Medicine at Harvard Medical School. Her clinical practice involves caring for patients at the Tucker Gosnell Center for Gastrointestinal Cancers and the Henri & Belinda Termeer Center for Targeted Therapies, where innovative early phase clinical trials are conducted.
Dr. Ellis' clinical and research interests are focused on biliary cancers (cholangiocarcinoma and gallbladder cancer). She is dedicated to advancing the understanding and treatments of these cancers through scientific research and clinical trials. During her training at Memorial Sloan Kettering Cancer Center, University College Dublin, and Washington University in St. Louis, she garnered numerous accolades in medicine and oncology, including a prestigious clinician-scientist research scholarship. Dr. Ellis subsequently completed a medical oncology fellowship at Dana-Farber Cancer Institute, Brigham and Women's Hospital, and Massachusetts General Hospital, where she was selected as chief fellow. She is a member of the American Association for Cancer Research (AACR), American Society of Clinical Oncology (ASCO), and International Cholangiocarcinoma Research Network (ICRN). In addition to collaborating with a multidisciplinary team, she also enjoys working with patient/research advocates to provide comprehensive and compassionate care to her patients.
Education & Training
- Fellowship: Brigham and Women's Hospital, Medical Oncology-Combined program, 2025
- Fellowship: Massachusetts General Hospital, Medical Oncology-Combined program, 2025
- Residency: Washington University, Barnes-Jewish Hospital, Internal Medicine, 2021
- Medical Education: University College of Dublin School of Medicine, 2018
Board Certifications
- Medical Oncology, American Board of Internal Medicine
Languages Spoken
- English
Age Group Treated
- Adults
Patient Feedback
4.940594 average rating from 101 reviews
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Awesome service as always highly recommended
2026-07-05
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Dr.Ellis was very attentive to my concerns and questions. She was very good at explaining complex things. My husband and I felt heard.Dr. Ellis seems to really want to help.
2026-06-14
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Hi, Dr. Haley is amazing. I think she pays attention to her patients. I felt respected. I felt she really cared about my condition. She knows a lot about colonial carcinoma and she's like one of the aspects in the world for this specific cancer, rare cancer. It was great to talk to her and like her lay out all the different, my different treatment options. I also felt like for someone as busy as her, she made sure she really explained into detail like what my options were at a third grade level. And she also made sure all my questions were answered. I live in New Jersey, so really, really far away from the hospital. I've been to different cancer centers and she's by far the best colonial doctor I've met because she's just attentive. She just knows a lot about the space and she just, her bedside manner is just excellent, excellent, excellent.
2026-06-11
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It was excellent
2026-06-04
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Dr. Ellis was knowledgeable, positive and empathetic. She was able to confirm that my current treatment plan was the best one for me at this time.
2026-05-23
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The doctor was definitely knowledgeable and caring.
2026-05-23
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Tremendous. She knew me well enough to go at an appropriate pace and technical level, which I image is higher than most. Yet not being a medical professional, she broke it down clearly. I imagine she can give the appropriate information at a level that could be understood.
2026-05-22
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Dr Ellis is fantastic. I am very lucky to have her on my team.
2026-05-14
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Dr. Ellis is an outstanding subject matter expert. She handled the material very well, presented it in a way that was understandable, was respectfully listening, and just had an outstanding personality that made what could be a really hard and difficult visit about end of life and cancer, a chemo. And instead, it was enjoyable and learned new things and it was wonderful to meet her. You are the beneficiary as an organization for having her in it.
2026-05-01
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It went very well with Dr. Haley Ellis. Everything worked out well. Thank you so much.
2026-05-01
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She was excellent in everything she did and said about the cancer I have.
2026-04-25
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Very glad i was able to see Dr Ellis. She was compassionate and explained various treatment options. She offered needed words of encouragement and answered all of our questions.
2026-04-18
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incredible knowledge about my history and what i should expect. her honesty made me feel comfortable and more relaxed and that i was a patient and not just a number.
2026-04-01
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Dr. Ellis was great in every way, forthright and cheery in a glum situation and knowledgeable in all aspects of the situation.
2026-03-28
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Very easy to communicate with, pleasant, knowledgeable and upbeat.
2026-03-11
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Dr. Hailey Ellis was so clear and informative about presenting my treatment options to me! And of course she is the perfect person to talk with about my genetic profile. I am so glad my local oncologist made this referral for me. A very valuable appointment time!
2026-03-10
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Excellent
2026-03-06
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I felt very comfortable dealing with all appointments. All my concerns were addressed some difficulties that I'm having and solutions
2026-03-05
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I was so very pleased. It was calming to speak with the doctors under the circumstances, regarding the diagnosis of cancer.
2026-03-04
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The experience was great and informative
2026-03-03
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I felt the doctor came very prepared to the meeting and had definitely researched my case and knew every detail and aspect that was required to have a thorough conversation and second opinion. Thank you very much.
2026-02-13
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Very professional
2026-02-11
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This was my first visit with this provider and I am certain that this provider will help me.
2026-02-07
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She explained things so I could understand what was going on.
2026-02-06
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Confidence inspiring, able to explain my situation in terms I understood.
2026-01-28
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I am grateful to have access to Dr Ellis and her expertise. In addition she is extremely caring and understanding.
2026-01-27
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Dr Ellis was absolutely fabulous. Answered every question that I had and provided very valuable advice. She is a first class oncologist with clear expertise in her field. I eft my consult feeling much more comfortable with my current treatment and future direction that when I arrived.
2026-01-17
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Dr Haley Ellis is as wonderful I was told she was. I am very pleased with her care and excellent bedside manner.
2026-01-04
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She was extremely patient and kind and smart and explain things in a way that made it accessible and made sense to me.
2026-01-03
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I can't say enough about the provider he was very kind attentive and explained everything very well. It is so nice to have caring people take care of you.
2026-01-03
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Absolutely wonderful.
2026-01-04
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Dr. Ellis is a true gem. Expert, thorough, kind and caring. She's helping me navigate several very difficult diagnoses. I likely won't live long with the cholangiocarcinoma, but she brings hope, and reassurance to each visit. When seeing her, I feel like I'm the only patient she has to care for. She's always up to date on the science, and has reviewed much of my workup at other institutions. I couldn't ask for better support.
2025-12-29
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Dr Ellis was wonderful. I was extremely nervous about this appointment and she put my mind at ease. I gave her a big hug after the appointment.
2025-11-30
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Thumbs up, excellent, doc and sedation doc. Took care to go slow, check in, read history and listen
2025-11-30
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Very knowledgeable and caring. Explains everything clearly and answers questions.
2025-11-20
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Limited direct contact
2025-11-17
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Dr. Ellis was great. She answered all questions my wife and I had and did not rush us at all
2025-11-01
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Dr. Ellis is very knowledgeable, personable, and positive. I look forward to working with her in the future.
2025-11-02
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Hi, so we got an exact timely appointment with Dr. Ellis. She was so good and we got all the medical details that we need. She explained everything in very simple terms and we were able to understand and she was so helpful in explaining all the possible treatments that I need and we were very much satisfied with the doctor's appointment and she's a great person and thank you so much.
2025-10-27
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She was very thorough, listened to everything I said and answered all my questions. I was beyond impressed with how thorough and knowledgeable Dr. Ellis was.
2025-10-25
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the experience was more than helpful. Everyone I spoke to was very courteous and very knowledegable: confidence inspiring
2025-10-23
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I was frightened going in and hopeful when leaving. Dr Ellis is very intelligent and caring. MGH answered my prayers. Thank you.
2025-10-15
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Dr Ellis is terrific
2025-08-23
Accepted Insurance
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