3 Criteria
A. Presence of a single Major Depressive Episode

B. Episode not better accounted for by Schizophreniform Disorder, Delusional Disorder, or Psychotic Disorder NOS.

C. There has never been a Manic Episode, Mixed Episode, or Hypomanic Episode.

Specify: Mild/ Moderate/ Severe w.o psychotic features/ Severe w. psychotic features/ Chronic/ w. catatonic features/ w. melancholic features/ w. atypical features/ w. postpartum onset/ partial remission/ full remission

3 Criteria
A. Presence of two or more Major Depressive Episodes (at least 2 month interval w. criteria not met for Major Dep. Ep.)

B. Not better accounted for b y Schizpaffective Disorder and are not superimposed on Schizophrenia, Schizophreniform Disorder, Delusional Disorder, or Psychotic Disorder NOS.

C. Never been a Manic Episode, Mixed Episode, or Hypomanic Episode.

Specify: Mild/ Moderate/ Severe w.o psychotic features/ Severe w. psychotic features/ Chronic/ w. catatonic features/ w. melancholic features/ w. atypical features/ w. postpartum onset/ partial remission/ full remission/ Longitudinal Course Specifiers/ w. seasonal pattern

8 Criteria
A. Depressed mood for most of the day, for more days than not, indicated either by subjective account or observation by others, for at least 2 years. (Children/Adolescents, mood can be irritable w. duration at least 1 year)

B. Presence, while depressed, of 2 or more:
    1. poor appetite or overeating
    2. insomnia or hypersomnia
    3. low energy or fatigue
    4. low self-esteem
    5. poor concentration or difficulty making decisions
    6. feelings of hopelessness

C. Never w.o symptoms (A+B) for more than 2mo at a time

D. No Major Depressive Episode has been present during first 2 years disturbance (Not better accounted for by chronic Major Depressive Disorder)

E. Never been Manic, Mixed, or Hypomanic Episode, and criteria have never been met for Cyclothymic Disorder

F. Not exclusive to a Psychotic Disorder

G. Not due to a substance or general medical condition

H. Cause clinically sig. distress or impairment

Specify:  Early onset (before 21 y.o)
             Late onset (after 21 y.o)
             W. Atypical features (most recent 2 yrs of disorder)