The IASP classification of chronic pain for ICD-11 proposes a new diagnosis of chronic primary pain (CPP) to address the limitations of previous classifications. CPP is defined as pain persisting for more than 3 months, associated with significant emotional distress and/or functional disability, and not better explained by another condition. Unlike previous systems, CPP is not restricted to biological or psychological factors and allows for subtypes. The classification aims to provide a more accurate description of chronic pain conditions, facilitating individualized management plans in both primary care and specialized settings. CPP is distinguished from chronic secondary pain, which is associated with an underlying disease. The classification includes various subtypes such as chronic widespread pain, complex regional pain syndrome, chronic primary headache or orofacial pain, chronic primary visceral pain, and chronic primary musculoskeletal pain. Each subtype is characterized by specific features and diagnostic criteria. The classification is integrated with the ICD-11 framework and includes diagnostic codes for each condition. The new classification is expected to improve the understanding and management of chronic pain by providing a more comprehensive and accurate framework. It also aims to enhance public policy and research by improving the representation of chronic pain in health statistics. The classification avoids terms like "somatoform," "nonspecific," and "functional," which have been considered outdated or ambiguous. The proposal emphasizes the importance of considering biological, psychological, and social factors in chronic pain. The classification is supported by a task force of experts and is expected to be useful in both clinical and research settings. The new classification is expected to enhance pain management outcomes by allowing for more targeted interventions and improving the understanding of the underlying causes of chronic pain. The classification is also expected to improve the accuracy of health statistics and inform public policy decisions related to chronic pain. The authors emphasize the importance of avoiding biases in categorization that may overlook individual idiosyncratic features of chronic pain. The classification is expected to provide a more accurate and comprehensive framework for understanding and managing chronic pain.The IASP classification of chronic pain for ICD-11 proposes a new diagnosis of chronic primary pain (CPP) to address the limitations of previous classifications. CPP is defined as pain persisting for more than 3 months, associated with significant emotional distress and/or functional disability, and not better explained by another condition. Unlike previous systems, CPP is not restricted to biological or psychological factors and allows for subtypes. The classification aims to provide a more accurate description of chronic pain conditions, facilitating individualized management plans in both primary care and specialized settings. CPP is distinguished from chronic secondary pain, which is associated with an underlying disease. The classification includes various subtypes such as chronic widespread pain, complex regional pain syndrome, chronic primary headache or orofacial pain, chronic primary visceral pain, and chronic primary musculoskeletal pain. Each subtype is characterized by specific features and diagnostic criteria. The classification is integrated with the ICD-11 framework and includes diagnostic codes for each condition. The new classification is expected to improve the understanding and management of chronic pain by providing a more comprehensive and accurate framework. It also aims to enhance public policy and research by improving the representation of chronic pain in health statistics. The classification avoids terms like "somatoform," "nonspecific," and "functional," which have been considered outdated or ambiguous. The proposal emphasizes the importance of considering biological, psychological, and social factors in chronic pain. The classification is supported by a task force of experts and is expected to be useful in both clinical and research settings. The new classification is expected to enhance pain management outcomes by allowing for more targeted interventions and improving the understanding of the underlying causes of chronic pain. The classification is also expected to improve the accuracy of health statistics and inform public policy decisions related to chronic pain. The authors emphasize the importance of avoiding biases in categorization that may overlook individual idiosyncratic features of chronic pain. The classification is expected to provide a more accurate and comprehensive framework for understanding and managing chronic pain.