In 2022, CHADD received funds from a generous donor to sponsor and support the development of national guidelines in the U.S. for the diagnosis and treatment of adult ADHD. This milestone has been achieved due to the sustained efforts of our Public Policy Committee and builds on the committee’s published recommendations emerging from a national CHADD summit held in 2019 (see “The Adverse Health Outcomes, Economic Burden, and Public Health Implications of Unmanaged ADHD,” Journal of Attention Disorders, 2022 Apr;26(6):807-808). The Adult ADHD Guidelines project, formerly titled the “DATAA Project” (Diagnosis and Treatment of Adult ADHD), consists of a coalition of organizations focused on this goal, including the American Psychiatric Association, The American Psychological Association, The American Academy of Neurology, The American Association of Nurse Practitioners, and The National Alliance on Mental Illness. In 2023, CHADD signed an agreement to coordinate efforts on the project with The American Professional Society of ADHD and Related Disorders (APSARD). Working together with APSARD, the coalition expects to launch guidelines in 2025 and develop resources and toolkits for providers across the United States to implement these new diagnostic and treatment guidelines.