C. Jillian Tsai, MD, PhD

About Me

I am a board-certified radiation oncologist who specializes in treating head and neck cancer, soft tissue sarcoma, skin cancer, lung cancer, and metastatic cancers. I use advanced radiation therapy techniques to safely and effectively deliver treatments and to minimize side effects. I see patients at Memorial Hospital in Manhattan and Memorial Sloan Kettering Commack in Long Island. I enjoy meeting members of the community and am honored to provide exceptional, personalized care for my patients.

I work closely with a multidisciplinary team of medical and surgical oncologists, pathologists, and radiologists to make individualized treatment plans. Treating cancer is a group effort, and the patient is the most important participant. When creating a care plan, I highly value the input of my patients. I believe it is critical to discuss expectations, possible side effects, and the support systems and to work through them together.

My main research goal is to advance cancer treatment through innovative cancer clinical trials and new radiation techniques. I am Director of Head and Neck Radiation Oncology Research. Our team of experts have several revolutionary trials that integrate advanced radiation therapy techniques with immunotherapy or other novel therapeutics to improve cancer care outcome as well as quality of life for our patients. In addition, I am also dedicated to developing novel radiation treatment approaches for patients with metastatic disease. 

  • Clinical Expertise: Head and Neck Cancer; Soft Tissue Sarcoma; Skin Cancer; Palliative Care; Metastatic Disease; Intensity Modulated Radiation Therapy; Image-Guided Radiation Therapy; Stereotactic Body Radiation Therapy; Stereotactic Radiosurgery
  • Awards and Honors: Special Training Award, The International Agency for Research on Cancer, World Health Organization, Lyon, France; Intramural Research Training Award, National Institute of Health; Trainee Excellence Award, the University of Texas MD Anderson Cancer Center; Philips Healthcare/RSNA Research Resident Grant; The Janice D. Singletary Fellowship for Lymphoma, The University of Texas M.D. Anderson Cancer Center; Eleanor Montague Distinguished Resident Award in Radiation Oncology, American Association for Women Radiologists
  • Languages Spoken: English; Mandarin
  • Education: MD, Vanderbilt University; PhD, Stanford University
  • Residencies: Radiation Oncology - MD Anderson Cancer Center
  • Board Certifications: Radiation Oncology


Visit PubMed for a full listing of C. Jillian Tsai’s journal articles

Pubmed is an online index of biomedical articles maintained by the U.S. National Library of Medicine and the National Institutes of Health.

Clinical Trials

Research is integral to our mission at Memorial Sloan Kettering, and clinical trials help us discover better forms of patient care and treatment. For you, this could mean access to a new therapy or therapy combination. Click to see a list of the trials I’m currently leading.

Clinical Trials Led by C. Jillian Tsai


Most major health insurers offer plans that include MSK as one of their in-network providers. If MSK is in-network, it means all our doctors are too. Medicaid and New York State Medicare also provide benefits for care at MSK.

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