Dr. Richard Cassidy is a radiation oncologist who practices at our Fleming Island and Southpoint locations. He completed his medical education at the University of Florida in Gainesville, Florida, where he was in the Junior Honors Medical Program and received Alpha Omega Alpha honors. He completed his radiation oncology training at the Winship Cancer Institute of Emory University in Atlanta, Georgia, where he was chief resident. He received the honor of “Andrew W. Pippas Resident in Radiation Oncology” in his fourth and fifth years of residency, an honor selected by the Emory University Radiation Oncology Department for a resident that excels in professionalism and compassionate, ethical patient care. He has won an ASCO Conquering Cancer Foundation Merit Award and an ASTRO project recognition award in addition to first-authoring publications about lung cancer, breast cancer, prostate cancer, head and neck cancer, lymphoma, and gastrointestinal cancers.

What Dr. Cassidy loves most about his job is the ability to combine advanced technology, team-based care, and compassion treating cancer patients. Dr. Cassidy believes that not every patient is the same. “It’s important to consider someone’s personal beliefs, wishes, and goals. My philosophy is to involve patients in their treatment plan, because cancer care is more than just addressing the medical condition. It involves the whole patient and their personal situation,” he says.

Like others, Dr. Cassidy has had many family members who have passed away from cancer. He was not able to know either of his grandfathers growing up because they both passed away from lung cancer. He also recently lost a grandmother to pancreatic cancer. “These losses sharpened my interest and focus in improving oncology care to be sure that cancer patients receive the best possible care. I strive to treat all my patients as if they were family members,” he says.

Dr. Cassidy grew up playing team sports, and believes complex cancer care is a “team sport.” At CSNF, he enjoys the ability to work closely with not only physician colleagues in medical and radiation oncology, but also with amazing staff in social work, nursing, radiation therapists, physicists, dosimetrists, pharmacists, and front-desk staff. “This makes for a close-knit atmosphere, which ultimately benefits patients and their families. The honor to serve my community and to directly give back to my hometown gives me extreme pride,” he says.

Dr. Cassidy and his wife both grew up in North Florida, and the city holds a special place in their hearts. It is home for both of them. When not working, he enjoys spending time with his wife and their families who still live in the Jacksonville area. He attempts to still play basketball and golf, as well as be a slightly over the top fan of University of Florida Gator sports. 


University of Florida — Gainesville, Florida
Doctor of Medicine
University of Florida — Gainesville, Florida
Bachelor of Science


Emory University — Atlanta, Georgia


Emory University — Atlanta, Georgia