Autism Collaboration, Accountability, Research, Education, and Support Act of 2019 or the Autism CARES Act of 2019 This bill reauthorizes through FY2024 and revises several programs and activities relating to autism spectrum disorder (ASD). Specifically, the bill reauthorizes provisions relating to (1) expanded ASD research at the National Institutes of Health; (2) the collection of state-level ASD data by the Centers for Disease Control and Prevention; (3) ASD education, early detection, and intervention activities supported by the Health Resources and Services Administration; and (4) the Interagency Autism Coordinating Committee. The bill also generally revises the scope of such programs and activities to (1) encompass ASD individuals of all ages, rather than only youth; (2) focus funding on programs in areas with a shortage of personal health services; and (3) reduce health-outcome disparities across diverse populations.