About Rebecca Karp, MD

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.

Departments, Centers, & Programs:

Clinical Interests:

Treats:

Locations

Mass General Cancer Center: Hematology Oncology
55 Fruit St.
Boston, MA 02114
Phone: 617-724-4000

Mass General Brigham Healthcare Center
52 Second Ave.
Waltham, MA 02451
Phone: 781-487-6100
Fax: 617-487-6201

Medical Education

  • MD, Mount Sinai School of Medicine
  • Residency, Beth Israel Deaconess Medical Center
  • Fellowship, Beth Israel Deaconess Hospital

American Board Certifications

  • Hematology, American Board of Internal Medicine
  • Internal Medicine, American Board of Internal Medicine
  • Medical Oncology, American Board of Internal Medicine

Note: This provider may accept more insurance plans than shown; please call the practice to find out if your plan is accepted.

Reviews: Comments and Ratings

4.9out of 5(134 Ratings, 69 Comments)

April 2025

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


April 2025

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


April 2025

personable, available, open to discussion, informative


April 2025

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


April 2025

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


March 2025

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


March 2025

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


March 2025

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


March 2025

Dr Karp is brilliant, empathetic, and very careful


March 2025

Dr. Karp is wonderful. I am a new patient. She was thorough, helpful, understanding, and kind. She made it a pleasant experience.

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