The three major mood disorders are

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Major depression, bipolar I, and bipolar II are the three major mood disorders recognized by the DSM-5. Dysthymic disorder and cyclothymic disorder are also mood disorders but are considered to be less severe than major depression and bipolar disorder. SAD (Seasonal Affective Disorder) is a subtype of major depression. Hebephrenic, paranoid, and disorganized are subtypes of schizophrenia, not mood disorders. "Manic-depression" is an outdated term for bipolar disorder, and "agitated depression" is not a recognized diagnostic category.

The Three Major Mood Disorders Are