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Joyce O'Shaughnessy, M.D.

General Summary

Joyce A. O’Shaughnessy, M.D. specializes in medical oncology with board certification in both internal medicine as well as medical oncology. She is a Diplomate of the American Board of Internal Medicine with subspecialty certification in medical oncology. Dr. O’Shaughnessy focuses on breast cancer prevention and treatment. She is Co-Chair of Breast Cancer Research and Chair of Breast Cancer Prevention Research at Baylor-Sammons Cancer Center and for The US Oncology Network and is a member of the Scientific Advisory Board for US Oncology Research Network.


Dr. O’Shaughnessy received her M.D. from Yale University Medical School. Her internship and residency in internal medicine were completed at Massachusetts General Hospital in 1985. She concluded a fellowship in medical oncology at the National Cancer Institute in 1987 and was a Senior Investigator there until 1995.

Medical Practice

Research Interest

Surgery Locations

Other Information

Accolades & Memberships

Member, American Association for Cancer Research; American Society of Clinical Oncology; American Medical Women’s Association; American Medical Association; American College of Physicians; and Women in Cancer Research. Associate Editor, Clinical Breast Cancer Journal; founder, The School of Breast Oncology. In 2009 D Magazine elected Dr. O’Shaughnessy as one of the best hematology oncologists in Dallas, Texas.

Community Service