The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5), published by the American Psychiatric Association in 2013, represents the most comprehensive revision of the manual since the DSM-IV in 1994. This edition eliminates the multi-axial system, integrating clinical syndromes and personality disorders into a single category while maintaining separate notations for psychosocial and environmental factors, as well as disability. One of the most significant changes is the reclassification and expansion of certain disorders. For example, Autism Spectrum Disorder now encompasses several previous diagnoses such as Autistic Disorder and Asperger's Disorder under a single umbrella. Other notable updates include the creation of new disorder categories like Obsessive-Compulsive and Related Disorders, inclusion of conditions such as Hoarding Disorder and Binge Eating Disorder, and significant revisions to the diagnostic criteria for disorders like ADHD and PTSD. Emphasizing a dimensional rather than categorical approach to diagnosis, the DSM-5 aims to better reflect the continuum of mental health conditions and their impact on individuals across diverse clinical presentations.