Katy Tsai, MD

Oncologist and melanoma specialist

Dr. Katy K. Tsai is a medical oncologist specializing in the treatment of melanoma and other skin cancers. She was born in Taiwan and raised in Toronto, Canada.

In addition to caring for patients, Tsai conducts clinical trials with her colleagues in cutaneous oncology, Dr. Adil Daud and Dr. Alain Algazi, to develop new and better therapies for patients with advanced melanoma and head and neck cancers. She has a longstanding interest in quality of life and outcomes in patients receiving immunotherapy.

Tsai graduated with a degree in comparative literature from Brown University before receiving her medical degree, also from Brown University, in 2010. Subsequently, she completed an internship and residency in internal medicine at the University of North Carolina in Chapel Hill, followed by a fellowship in medical oncology at UCSF, where she served as chief fellow and is now clinical instructor. Tsai is a member of the American Society of Clinical Oncology.


Melanoma and Skin Cancer Program
1600 Divisadero St., Third Floor
San Francisco, CA 94115
Phone: (415) 353-9900
Fax: (415) 885-3802

Hours: Monday to Friday, 8 a.m. - 5 p.m.

Academic Title

Assistant Professor

More about Katy Tsai


Brown University School of Medicine 2010


University of North Carolina School of Medicine, Internal Medicine 2013


UCSF, Medical Oncology 2015

Selected Research and Publications

  1. Tsai KK, Bollin KB, Patel SP. Obstacles to improving outcomes in the treatment of uveal melanoma. Cancer. 2018 Mar 26.
  2. Ramstein JJ, Tsai KK, Smith JF. Tyrosine Kinase Inhibitors and Male Reproductive Health. Clin Pharmacol Ther. 2017 Nov; 102(5):754-756.
  3. Loo K, Tsai KK, Mahuron K, Liu J, Pauli ML, Sandoval PM, Nosrati A, Lee J, Chen L, Hwang J, Levine LS, Krummel MF, Algazi AP, Pampaloni M, Alvarado MD, Rosenblum MD, Daud AI. Partially exhausted tumor-infiltrating lymphocytes predict response to combination immunotherapy. JCI Insight. 2017 07 20; 2(14).

Publications are derived from MEDLINE/PubMed and provided by UCSF Profiles, a service of the Clinical & Translational Science Institute (CTSI) at UCSF. Researchers can make corrections and additions to their publications by logging on to UCSF Profiles.