The IASP classification of chronic pain for ICD-11: applicability in primary care.

The International Classification of Diseases, 11th Revision (ICD-11), proposes, for the first time, a coding system for chronic pain. This system contains 1 code for "chronic primary pain," where chronic pain is the disease, and 6 codes for chronic secondary pain syndromes, where pain developed in the context of another disease. This provides the opportunity for routine, standardised coding of chronic pain throughout all health care systems. In primary care, this will confer many important, novel advantages over current or absent coding systems. Chronic pain will be recognized as a centrally important condition in primary care. The capacity to measure incidence, prevalence, and impact will help in identification of human, financial, and educational needs required to address chronic pain in primary care. Finally, opportunities to match evidence-based treatment pathways to distinct chronic pain subtypes will be enhanced.