Bio


Dr. Sibley is a Clinical Associate Professor of Medicine (Oncology) at Stanford School of Medicine. She is the Director of the Stanford Medicine Cancer Center in Emeryville and is a board-certified, fellowship-trained hematologist and medical oncologist.

Her clinical interests include treating solid tumor cancers, lung cancers, blood cancers and benign blood conditions. She is interested in cancer prevention and reducing disparities in hematologic/oncologic care among underserved populations, and successful cancer survivorship programs.

In addition to responsibilities related to patient care and overseeing the Cancer Center in Emeryville, Dr. Sibley has developed and is leading an innovative cancer survivorship clinic, including an exercise initiative. She also is passionate about advancing clinical trial enrollment for medically underserved populations and she serves on the Cancer Network’s East Bay Health Equity Committee leading lung cancer screening efforts in the East Bay. She is also working on a Stanford Cancer Institute-funded study examining psychosocial factors and cardiac health in Black cancer patients in the East Bay.

She believes that providing patient care is a true privilege. Dr. Sibley utilizes a patient-centered practice approach that addresses multiple aspects of a patient’s well-being. Her research interests have included chemoprevention of breast cancer and the development of magnetic resonance imaging technology in breast cancer detection and mapping. She has also led community-based efforts to implement low-dose computed tomography (LDCT) as a screening tool for cancer.

Dr. Sibley’s publications include articles on breast cancer prevention, breast magnetic resonance imaging, and other topics. Her work has appeared in American Journal of Hematology, JAMA, the Breast Journal, Internal Medicine News, and elsewhere. Dr. Sibley was invited to deliver a peer-reviewed presentation on community-based cancer screening and preventive education to the Global Health Council. Dr. Sibley is on the board of directors of the Cancer Support Community SF Bay Area. She has also served as a clinic physician for the Native American Health Center of Oakland, on the Committee on Health Equity of the American Public Health Association, and as chair and vice chair of the Cancer Forum Caucus of the American Public Health Association. She is a member of the American Society of Clinical Oncology, American Society of Preventive Oncology, and American Society of Hematology. She has provided volunteer services to the Global Health Council and to the Cancer Patients Aid Association, for whom she conducted a patient screening and education program in Mumbai, India.

Clinical Focus


  • Medical Oncology

Academic Appointments


Professional Education


  • Board Certification: American Board of Internal Medicine, Medical Oncology (2023)
  • Board Certification: American Board of Internal Medicine, Hematology (2023)
  • Fellowship: University of Arkansas Hematology and Medical Oncology Fellowship (2010) AR
  • Residency, Internal Medicine, Harvard Medical School/Mount Auburn Hospital, MA (2007)
  • Medical Education: University of Tennessee College of Medicine (2003) TN