Chad D Kollas, MD

Orlando Health is one of Florida's most comprehensive private, not-for-profit healthcare networks, and is based in Orlando, FL. Our facilities, advanced medical treatments and procedures, and highly qualified staff have distinguished Orlando Health as a healthcare leader for nearly two million Central Florida residents and 10,000 international visitors annually.

Tomas Dvorak, MD, is a radiation oncologist at the Orlando Health Cancer Institute, where he serves as the chief of breast and gynecologic malignancies radiation oncology. He also focuses on the treatment of thoracic and skin malignancies. He is board certified in radiation oncology by the American Board of Radiology, and holds an appointment as assistant professor of radiation oncology at the University of Florida in Gainesville. Dr. Dvorak is trained in proton therapy, an advanced treatment instituted at Orlando Health in 2016.

Orlando Health is one of Florida's most comprehensive private, not-for-profit healthcare networks, and is based in Orlando, FL. Our facilities, advanced medical treatments and procedures, and highly qualified staff have distinguished Orlando Health as a healthcare leader for nearly two million Central Florida residents and 10,000 international visitors annually.