Diagnostic Manual – Intellectual Disability (DM-ID) The National Association for the Dually Diagnosed (NADD), in association with the American Psychiatric Association (APA), developed a Manual that is designed to be an adaptation of the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition—Text Revision (DSM-IV-TR).  The title of this Manual is the Diagnostic Manual -- Intellectual Disability (DM-ID):  A Textbook of Diagnosis of Mental Disorders in Persons with Intellectual Disability.  Grounded in evidence based methods and supported by the expert-consensus model, Diagnostic Manual -- Intellectual Disability (DM-ID):  A Textbook of Diagnosis of Mental Disorders in Persons with Intellectual Disability offers a broad examination of the topic, including a description of each disorder, a summary of the DSM-IV-TR diagnostic criteria, a review of the literature and research and an evaluation of the strength of evidence supporting the literature conclusions, a discussion of the etiology and pathogenisis of the disorders, and adaptations of the diagnostic criteria for the ID population. A shorter volume, Diagnostic Manual-- Intellectual Disability (DM-ID):  A Clinical Guide for Diagnosis of Mental Disorders in Persons with Intellectual Disability has been abridged for clinical usefulness.  It focuses on issues related to diagnosis in people with ID, the limitations in applying DSM-IV-TR criteria to people with ID, and adaptation of the diagnostic criteria. The goal of both volumes is to facilitate a more accurate psychiatric diagnosis of people with ID.  Chapters in the DM-ID cover both special issues (i.e., assessment and diagnostic procedures and presentations of behavioral phenotypes of genetic disorders) as well as the individual DSM-IV categories.  For each disorder, descriptive text and details of how to apply diagnostic criteria,, as well as tables of adapted diagnostic criteria are included. The development of the DM-ID was partially funded by the Joseph P. Kennedy, Jr. Foundation. We would also like to acknowledge that the DM-ID was developed in association with the American Psychiatric Association.