The 2nd edition of the International Classification of Sleep Disorders (ICSD-2) was published by the American Academy of Sleep Medicine in 2005. This system classifies sleep disorders into eight major categories:
InsomniaSleep related breathing disordersHypersomnias of central originCircadian rhythm sleep disordersParasomniasSleep related movement disordersIsolated symptoms and normal variantsOther sleep disorders
ICSD-2 includes over 70 specific diagnoses within the eight major categories, as well as two appendices for classification of sleep disorders associated with medical or psychiatric disorders.
This system classifies sleep disorders into eight major categories: