Single episode depressive disorder
Definition
Single episode depressive disorder is characterised by the presence or history of one depressive episode when there is no history of prior depressive episodes. A depressive episode is characterised by a period of depressed mood or diminished interest in activities occurring most of the day, nearly every day during a period lasting at least two weeks accompanied by other symptoms such as difficulty concentrating, feelings of worthlessness or excessive or inappropriate guilt, hopelessness, recurrent thoughts of death or suicide, changes in appetite or sleep, psychomotor agitation or retardation, and reduced energy or fatigue. There have never been any prior manic, hypomanic, or mixed episodes, which would indicate the presence of a bipolar disorder.
Exclusions
10 subordinate codes
6A70.0Single episode depressive disorder, mild6A70.1Single episode depressive disorder, moderate, without psychotic symptoms6A70.2Single episode depressive disorder, moderate, with psychotic symptoms6A70.3Single episode depressive disorder, severe, without psychotic symptoms6A70.4Single episode depressive disorder, severe, with psychotic symptoms6A70.5Single episode depressive disorder, unspecified severity6A70.6Single episode depressive disorder, currently in partial remission6A70.7Single episode depressive disorder, currently in full remission4B4YOther specified diseases of the immune system4B4ZDiseases of the immune system, unspecified