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A. Jo Chien


Breast oncologist

About me

Dr. A. Jo Chien specializes in breast cancer, with special expertise in tumors called HER2-positive (human epidermal growth factor receptor 2), typically a more aggressive type of cancer. Her research interests include HER2-positive cancers, breast cancer in young women and fertility problems related to cancer treatment.

Chien graduated from Harvard Medical School in 2003 and completed a residency in internal medicine at Massachusetts General Hospital. She was a fellow in hematology and oncology at UCSF from 2006 to 2009.

Chien has received an international health grant from the Massachusetts Medical Society and Alliance Charitable Foundation, a young investigator award from the American Society of Clinical Oncology (ASCO), a merit award from the ASCO Foundation and a postdoctoral fellowship from the American Cancer Society.

Chien has published numerous articles in medical journals related to her breast cancer research. She is a member of ASCO and the American Association for Cancer Research.

  • Education

    Harvard School of Medicine, 2003

  • Residencies

    Massachusetts General Hospital, Internal Medicine, 2006

  • Fellowships

    UCSF, Hematology, 2009

  • Academic Title

    Associate Professor

  • Languages


Carol Franc Buck Breast Care Center

Bakar Precision Cancer Medicine Building

1825 Fourth St., Third Floor
San Francisco, CA 94158

My reviews


Overall Experience
240 Reviews
Dr. Chien gave me the time I needed to answer my questions and concerns. She is very compassionate and professional took excellent care of me. She ended the appointment with a hug that meant a lot to me.
Explained things in a way that was easy to understand
237 Reviews
Did the doctor pay attention to your concerns
239 Reviews
Gave easy to understand instructions about taking care of health problems or concerns
230 Reviews
Knew the important information about your medical history
239 Reviews
The provider showed respect for what you had to say
238 Reviews
The provider spent enough time with me
239 Reviews
Decorative Caduceus

Diarrhea Prophylaxis in Patients With HER2+ Breast Cancer Treated With Neratinib, With or Witho...

We will report the incidence of grade 3 or greater diarrhea events observed with 2 cycles (6 weeks) of prophylactic loperamide and crofelemer. Diarrhea events will be graded according to CTCAE version 4.0.