International Classification of Diseases, tenth revision: neurological adaptation (ICD-10 NA): extrapyramidal and movement disorders.

A classification of diseases is important in epidemiologic studies, indexing of clinical disorders, communication, and education. Since the 10th revision of the International Classification of Diseases (ICD-10) in 1992, a specialty-based neurological adaptation (ICD-10NA) has been developed to reflect the specific needs of individual subspecialties. Although the revision was constrained by the need to maintain compatibility with previous classifications, the new ICD-10NA of Extrapyramidal and Movement Disorders aims to provide an updated and comprehensive categorization of movement disorders.