Symptom | Individual complaints of difficulty falling asleep, difficulty maintaining sleep, or non-refreshing sleep. |
Duration | At least three days a week for at least one month. |
Consequence | The sleep disturbance results in marked personal distress or interference with personal functioning in daily living. |
Comorbidity | If other mental disturbances are present, Insomnia should be coded as an additional disturbance if either a) sleep disturbance is one of the patient's most prominent complaints, or b) if the sleep disturbance also occurs in periods without symptoms of other mental disturbance. |
Exclusion | There is no known causative organic factor. If the sleep disturbance only occurs during episodes of other mental disturbance, the primary mental disturbance should be coded. |