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Marisa Weiss, MD

Marisa Weiss, M.D. is the founder, president, and chief medical officer of Breastcancer.org. A breast oncologist with more than 25 years of active practice in the Philadelphia region, Dr. Weiss currently practices at Lankenau Medical Center, part of Main Line Health 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.

Dr. Weiss is the author of four critically acclaimed books on breast cancer and breast health, published by Random House: Living Beyond Breast Cancer and Living Well Beyond Breast Cancer, coauthored with her mother, Ellen Weiss (1998, 2010); Taking Care of Your “Girls:” A Breast Health Guide for Girls, Teens, and In-Betweens, coauthored with her daughter, Isabel Friedman (2008); and 7 Minutes!: How to Get the Most from Your Doctor Visit (2007).

After attending the University of Pennsylvania for her undergraduate studies, medical school, residency, and laboratory research fellowship, Dr. Weiss became an assistant professor in Penn’s Department of Radiation Oncology. In 1992, she established her clinical practice in the Main Line Health system.

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