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Rebecca S Karp

Rebecca S Karp, MD

Medical OncologyInternal MedicineHematology

Highlights

Age Groups Seen

  • Adults
  • Geriatrics

Languages

  • English

Gender

Female

About Rebecca S Karp

Dr. Rebecca Karp is a hematologist at the Massachusetts General Hospital and an Assistant Professor at Harvard Medical School. She treats a broad range of hematologic disorders and has a particular interest in antiphospholipid antibody syndrome, hematologic complications of pregnancy, and porphyria. She is Co-Founder and Co-Director of the multidisciplinary Mass General Porphyria Center, the largest porphyria center in New England. Dr. Karp received her medical degree from the Icahn School of Medicine at Mount Sinai Hospital in New York City and completed her residency in Internal Medicine and fellowship in Hematology/Oncology at Beth Israel Deaconess Medical Center in Boston. Dr. Karp is highly involved in medical education, and spends much of her time teaching medical students, residents, and fellows.

Locations

  1. Mass General Brigham Cancer Institute Medical Oncology Clinic
    • 52 Second Avenue, Blue Building, MGH CC Suite 1110, Waltham, MA 02451
    • Get Directions
  2. Mass General Brigham Cancer Institute Center for Hematology
    • 32 Fruit Street, Yawkey Building, 7th Floor, Suite 7b, Boston, MA 02114
    • Get Directions

Expertise

Education

  • Fellowship: Beth Israel Deaconess Hospital, Hematology & Medical Oncology, 2016
  • Residency: Beth Israel Deaconess Hospital, Internal Medicine, 2012
  • Medical Education: Icahn School of Medicine at Mount Sinai, 2009

Board Certifications

  • Hematology: American Board of Internal Medicine, 2016
  • Medical Oncology: American Board of Internal Medicine, 2016
  • Internal Medicine: American Board of Internal Medicine, 2012

Insurance

This provider may accept more insurance plans than shown. Please call the practice to find out if your plan is accepted.
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 ME
  • Medicaid NH
  • Medicaid RI
  • Medicaid VT
  • Medicare
  • Medicare ACO
  • Multiplan
  • Senior Whole Health
  • TriCare
  • Tufts Health Plan
  • Tufts Medicare Preferred
  • United Health Care
  • Wellpoint
  • WellSense
  • WellSense NH

Ratings & Reviews

4.9 out of 5

151 ratings, 75 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.

How likely would you be to recommend this provider to your family and friends?
Search reviews
  • Reviewed on 2/2/2026

    The Md extremely knowledgeable and able to communicate to me in a way that I can understand. The provider listened very carefully to any questions that I had, and gave me answers. The provider encouraged collaboration with other doctors

  • Reviewed on 2/4/2026

    Dr. Karp is very thorough. She has a lot of empathy. She understands how difficult it is to come to the cancer center and she's a very good listener and gives very, very good clear feedback.

  • Reviewed on 1/28/2026

    Dr. Karp is amazing.

  • Reviewed on 1/25/2026

    She was very nice like her a lot

  • Reviewed on 1/21/2026

    Wonderful, meaningful, encouraging atmosphere always!

  • Reviewed on 1/21/2026

    She responded promptly and adjusted to my schedule.

  • Reviewed on 1/14/2026

    Dr. Karp is very professional, knowledgeable, and gives excellent, excellent care. And her bedside manner, of course, is very good. Thank you.

  • Reviewed on 12/31/2025

    She is professional, warm, helpful, and knowledgable about her specialty.

  • Reviewed on 12/21/2025

    She is knowledgeable and caring

  • Reviewed on 12/17/2025

    Dr. Karp is perhaps the top one most impressive provider I have seen throughout my life.

  • Reviewed on 12/17/2025

    I love Dr. Karp. She's great. She understands my condition. She explains things very simply and the basis for why she's doing it and she truly cares. I could not ask for a better doctor. And while I see a lot of doctors, I look forward to seeing Dr. Karp. And I don't look forward to seeing all my doctors. I wish all of them were just like her.

  • Reviewed on 12/11/2025

    One of the most caring and kind doctors I have ever met! :)

  • Reviewed on 12/11/2025

    As my first time in this department Dr. Karp treated me with respect and compassion. She even explained to me all the different type of testing she was going to order when thru my history. Dr. Karp made me feel in peace and sure and clear with everything. I appreciate the time she took with me to treat me .

  • Reviewed on 12/3/2025

    She is a favorite of mine. I recommend her all the time.

  • Reviewed on 11/12/2025

    Dr Karp is the first Dr I have seen since my medical emergency in [redacted] that actually took the time to explain things in a way I understood and in a way that I felt reassured about my course of treatment.

  • Reviewed on 11/12/2025

    We have had the best experience at Mass General

  • Reviewed on 11/10/2025

    Dr. Karp is one of favorite doctors. She goes in depth regarding my health at each visit. I feel extremely secure under her care.

  • Reviewed on 11/4/2025

    Great experience!

  • Reviewed on 11/4/2025

    Despite some confusion about the ordering of lab tests my visit with Dr Karp was timely, thoughtful, on target, and informative. I will visit her again in eight months

  • Reviewed on 10/28/2025

    I trust and rely on Dr. Karp's expertise and opinions about my health care. Her judgement and knowledge has helped me to make and think through some tricky aspects of my health and health care. She is measured and compassionate. very knowledgeable and kind. I appreciate her and I am glad she is my MD.

  • Reviewed on 10/27/2025

    Everything went well and as expected.

  • Reviewed on 10/26/2025

    I respect her service that she provides to me but I wish that l never had to visit the Hospital that is my prayer ? ,Thanks Dr Karp for you attending to me Thanks [redacted]

  • Reviewed on 10/20/2025

    Dr. Karp is the best ! I love her so much she's so sweet caring and kind and always asked about my health and my family!

  • Reviewed on 10/13/2025

    She was very good

  • Reviewed on 10/3/2025

    With this providers help , we managed to put back my health in good shape

  • Reviewed on 10/1/2025

    Dr Karp is a wonderful caring professional!

  • Reviewed on 9/29/2025

    Dr Karp is the MOST Exceptional, Professional, Understanding , Physician I have EVER met and I am a Retired MGH RN !!

  • Reviewed on 9/17/2025

    Dr. Karp provides exceptional care! She is knowledgable, compassionate, collaborative and very responsive to questions and providing additional information or clarification as needed.

  • Reviewed on 9/18/2025

    The provider and her team were very responsive when I asked questions on patient gateways messaging system. They were prompt and knowledgeable.

  • Reviewed on 9/10/2025

    Dr Karp is so caring. Excellent!!

  • Reviewed on 9/9/2025

    Very thorough, thoughtful and very knowledgeable about my medical issues. In addition, Dr. Karp is a very pleasant person by nature.

  • Reviewed on 9/9/2025

    Very proficient

  • Reviewed on 9/3/2025

    I couldn't be more pleased regarding my experience with Dr. Karp. She had researched beforehand all my medical history, she asked many questions and listened carefully to all I had to say. I have had many health issues in the past few years and in my opinion Dr. Karp is at the top of the list not only as a dedicated physician but also a caring person as well.

  • Reviewed on 8/27/2025

    Dr Karp is amazing. She is so good at explaining things in a way that is easy to understand. She is compassionate and kind and so knowledgeable. I am so grateful for her care in such a challenging time.

  • Reviewed on 8/27/2025

    Dr, Karp is always interested in my overall health! She has made it clear that I could contact her at any time with any questions. I am getting the best care possible from Dr. Karp. I am very fortunate to be in her care.

  • Reviewed on 8/25/2025

    She is very thorough and very personable.

  • Reviewed on 8/26/2025

    Dr. Karp was thorough, asked lots of questions, explained things thoroughly and completely, and created a plan that seemed appropriate. She also let me ask any questions that I had.

  • Reviewed on 8/24/2025

    Dr. Karp has been wonderful since I became her patient after having a pulmonary embolism. Empathetic, concise, and precise in her explanations of my health, medications and recommendations, she has also been kind and engaging. I am very grateful to have such good and supportive medical care.

  • Reviewed on 8/7/2025

    Hi, Dr. Rebecca Karp is one of the most amazing doctors I've had the pleasure to be on my mom's team. She is caring, extremely knowledgeable, and has always been there. She's messaged me at different hours of the day and night when I've had concerns for my mother. She's always been there, always been helpful, always has provided a good solution. She's been very attentive and very understanding and always will take the time to answer all our questions. And I feel very comfortable knowing she's there and we have someone to turn to, especially my mom. Dr. Karp is a great source of comfort for my mom throughout this entire process of her care.

  • Reviewed on 8/6/2025

    Dr. Rachel Karp listened to my concerns, answered my questions, and explained everything in great detail. She is fantastic.

  • Reviewed on 8/4/2025

    Excellent

  • Reviewed on 8/4/2025

    Dr Karp is an excellent care provider. She relays information in a very clear way. I feel she is very knowledgeable and relays it in an understandable manner. I feel so fortunate to have her as my physician.

  • Reviewed on 8/4/2025

    Dr. Karp is and has always been an extremely professional and devoted provider. Someone who addresses my concerns in an informative and respectful manner. She is very much appreciated.

  • Reviewed on 8/3/2025

    My experience with Dr. Karp was excellent. I was nervous going into the appointment and she put me at ease immediately. She was very thorough and I left the appointment understanding what the next steps are and when. If I could rate her higher than a 10, I would.

  • Reviewed on 8/1/2025

    Dr. Karp is one of the best healthcare providers that I have had. She's compassionate, she listens well, she always follows up, and she goes out of her way to be accommodating. She not only schedules appointments promptly, but moves them up as is necessary in order to meet my needs. I couldn't be happier with anyone other than Dr. Karp. Thank you.

  • Reviewed on 7/29/2025

    Dr. Karp and her care has changed my life. She is a friend and a provider and i could not be more grateful!

  • Reviewed on 7/23/2025

    Excellent

  • Reviewed on 7/20/2025

    Dr karp is everything you want in a provider. Smart, kind, flexible, open. She is a treasure and you (and I) are just so lucky to have her.

  • Reviewed on 7/21/2025

    Excellent provider, excellent care. Thank you.

  • Reviewed on 7/16/2025

    Dr Karp is the best!

  • Reviewed on 7/14/2025

    Dr. Karp is extremely caring and knowledgeable.

  • Reviewed on 7/7/2025

    I am so very lucky to have Dr Karp as my doctor. She knows my past history is warm compassionate and caring ! She always listens attentively and answers all my questions and gives me excellent medical advice. I trust in her and know that she really cares about my health. She is an exceptional doctor !!!!

  • Reviewed on 7/7/2025

    She is really good doctor and listens attentively and very patient and answers all questions. Very good to talk to

  • Reviewed on 7/2/2025

    The DR was caring

  • Reviewed on 6/30/2025

    Fantastic care and professionalism!!!

  • Reviewed on 6/30/2025

    Professional and very caring !

  • Reviewed on 6/29/2025

    Dr. Karp's manner and interest in me and my condition was exceptional. Warm, caring, interesting and interested, doctor Karp was able to establish trust and rapport with me.

  • Reviewed on 6/26/2025

    The front desk was raving about how great of a doctor Dr.Karp is and she truly did not disappoint. I was grateful she took the time to help me understand exactly what was going on with my body.

  • Reviewed on 6/25/2025

    Dr Karp was very thorough in her examination and listened to my concerns intently. She explained her plan of care well.

  • Reviewed on 6/23/2025

    Nothing, the Doctor was excellent.

  • Reviewed on 6/19/2025

    She was, thorough, friendly and explained my situation to me clearly and patiently.

  • Reviewed on 6/11/2025

    Dr. Karp is an amazing human beimg, she is an excellent medical doctor. Dr. Karp listens to me, and is familiar eith my medical history. I trust my health in her medical knowledge. Great doctor, one of the best I've met in my care.

  • Reviewed on 6/9/2025

    Excellent provider! Dr. Karp is kind, thorough, professional, knowledgeable, and she truly cares about her patients. She is willing to help in any way she can, and she takes time to thoroughly explain things and answer all questions. I am very thankful for Dr. Karp.

  • Reviewed on 5/26/2025

    I was satisfied with the service .

  • Reviewed on 5/26/2025

    Dr. Karp was warm, kind, patient, experienced, skilled, and smart. Love her. Love her care. Thank you.

  • Reviewed on 5/19/2025

    Dr. Karp is down to earth, very approachable, very smart & spoke to me clearly about what was going with my health.

  • Reviewed on 5/7/2025

    Dr. Karp always comes to an appointment prepared and informed re my test results. I always feel heard by her.

  • Reviewed on 4/21/2025

    I did not know what to expect since she replaces Dr. [redacted] as my hematologist. He retired. She was wonderful! 'Knowlegeable AND Nice'!

  • Reviewed on 4/14/2025

    personable, available, open to discussion, informative

  • Reviewed on 4/14/2025

    She is very kind and easy to talk to. She also explained the blood test and how my results were improving.

  • Reviewed on 4/9/2025

    Dr. Karp is an incredible doctor who cares deeply about her patients.

  • Reviewed on 4/1/2025

    My experience with this provider was overall positive. [redacted]

  • Reviewed on 3/31/2025

    Dr. Karp is a fantastic doctor She and her team have monitored me and given me amazing care.

  • Reviewed on 3/31/2025

    I had a very good experience with Dr Karp she was very knowledgeable and easy to communicate with. [redacted]

  • Reviewed on 3/29/2025

    Dr Karp is brilliant, empathetic, and very careful