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Dr. Marisa Weiss, M.D.

About Marisa

Marisa C. Weiss, M.D. is the founder, Chief Medical Officer, and guiding force behind Breastcancer.org, the world's most utilized resource for medical and personal expert information on breast health and breast cancer — reaching 70 million people globally over the past 15 years. A breast cancer oncologist with more than 30 years of active practice in the Philadelphia region, Dr. Weiss is regarded as a visionary advocate for her innovative and steadfast approach to informing and empowering individuals to protect their breast health and overcome the challenges of breast cancer.

Dr. Weiss currently practices at Lankenau Medical Center, part of the Main Line Health Hospitals of the Thomas Jefferson University Health System in the Philadelphia area, where she serves as director of breast radiation oncology and director of breast health outreach. She also served on the National Cancer Institute Director’s Consumer Liaison Group from 2000 to 2007.

Hear from Marisa

Introduction to Dr. Marisa Weiss

A breast cancer survivor, Dr. Marisa Weiss, Founder and Chief Medical Officer of Breastcancer.org, introduces herself and the organization she founded following her own diagnosis.


Information About Breastcancer.org

Breastcancer.org was created by Dr. Marisa Weiss, who introduces her organization and talks about how it provides information and support for breast cancer patients, survivors and advocates.