This document summarizes key changes between the DSM-IV and DSM-5 diagnostic criteria and classifications. Some notable changes include: renaming intellectual disability and removing subtypes of schizophrenia; adding social communication disorder and disruptive mood dysregulation disorder; modifying the criteria for autism spectrum disorder, bipolar disorder, and major depressive disorder; removing the bereavement exclusion for major depression; and consolidating language, social anxiety, and specific phobia criteria.