House Bill 502 amends Tennessee Code Annotated to establish coverage for the diagnosis and treatment of Kleefstra syndrome under the TennCare program. The bill defines key terms, including "Bureau," "Enrollee," and "Kleefstra syndrome," which is described as a rare genetic disorder with various developmental and health-related challenges. The Bureau of TennCare is mandated to provide coverage for Kleefstra syndrome in a manner similar to existing coverage for autism spectrum disorder and Down syndrome, ensuring that enrollees receive necessary diagnostic and therapeutic services.

Additionally, the bill outlines that coverage must include early intervention and support aimed at improving the quality of life and development of individuals with Kleefstra syndrome. This encompasses various therapeutic modalities, medications, and other supportive programs. The director of TennCare is also authorized to apply for a federal waiver to implement these provisions effectively. The act is set to take effect on July 1, 2025.