On Mar. 24, 2020, the Harold C. Simmons Comprehensive Cancer Center at UT Southwestern announced it had joined the National Comprehensive Cancer Network (NCCN), an alliance of 30 distinguished cancer centers throughout the United States.

Entrance into NCCN was the latest in a series of milestones that the Simmons Cancer Center had achieved in the last year. In June, the Simmons Cancer Center broke ground on a nine-story tower that will add 300,000 square feet for outpatient care and clinical trials. Construction started on a second three-story radiation oncology building in September.