This session will provide an update on the development of the US Guidelines for the Diagnosis and Treatment of ADHD in Adulthood. Overseen by APSARD and a Steering Committee chaired by Thomas Spencer, MD, and Frances Levin, MD, three subcommittees have been working for approximately the past two years on the development of guidelines for 1) Screening and Diagnosis; 2) Medication and other Medical Treatments; and 3) Psychosocial and Other Non-Medical Interventions. A Delphi process involving successive rounds of writing, discussion, and voting followed by Steering Committee review (Stage 1), is being followed by two rounds of external review that are in progress. CHADD is partnering with APSARD as the guidelines development moves through these stages to include the perspectives of individuals with lived experience and to make plans for dissemination. This session will provide an update on the status of, and procedures for, external review and incorporation of feedback, and anticipated timing of release.