Dr. William Silveira is a board-certified radiation oncologist in Fresno, CA. He received his medical degree from Harvard Medical School, and Ph.D. in chemical physics from Cornell University.

Currently, Dr. Silveira is a volunteer assistant clinical professor at Univerity of California, San Francisco, and serves on the College of Mathematics and Science Advisory Board at California State University, Fresno. He is a General Tumor Board Moderator at Community Regional Medical Center.

Dr. Silveira completed his residency in radiation oncology at University of California, San Francisco. He’s been published in numerous medical journals, and has received a number of awards and fellowships, including the Cornell University Margaret & Herman Sokol Fellowship in chemistry (2004) and the Cornell University Franz Roessler Graduate Fellowship (2005).

Education and Certifications


Santa Clara Valley Medical Center


University of California, San Francisco, Radiation Oncology

Medical School

Harvard Medical School


American Board of Radiology