comscoreMarisa C. Weiss, MD

Marisa C. Weiss, MD

Marisa C. Weiss, MD, is chief medical officer and founder of, the leading patient-focused resource for breast health and breast cancer — reaching 194 million people globally since 2000.

Dr. Weiss is passionate about supporting and guiding our visitors from around the world who have breast cancer or are caring for a loved one. Under her leadership, has grown our comprehensive multimedia content and editorial initiatives, such as the ongoing Pulse Insights survey studies informed by the experiences and opinions of our community members.

Dr. Weiss currently practices at Lankenau Medical Center where she serves as director of breast radiation oncology and director of breast health outreach. A breast oncologist with more than 35 years of active practice in the Philadelphia region, Dr. Weiss is regarded as a visionary for her innovative and steadfast approach to informing and empowering individuals to protect their breast health and overcome the challenges of breast cancer. A renowned leader in the field of breast cancer, Dr. Weiss is frequently interviewed by media as a subject matter expert and respected voice of breast cancer patients.

As the lead author on several breast cancer survey studies, Dr. Weiss has had her research published in Cancer, the journal of the American Cancer Society, and has presented at prominent oncology conferences such as ASCO, ASTRO, SABCS, ISPOR, and the Miami Breast Conference. She’s also the author of four critically acclaimed books on breast cancer and breast health.

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— Last updated on February 18, 2022, 4:16 PM