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Bipolar II disorder

Bipolar II Disorder is a bipolar spectrum disorder that is characterized by at least one hypomanic episode and at least one major depressive episode. It is believed to be underdiagnosed because hypomanic behavior often presents as high-functioning.^{[citation needed]}

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DSM-IV-TR Diagnostic Criteria^[1]

A. Presence (or history) of one or more Major Depressive Episodes.

B. Presence (or history) of at least one Hypomanic Episode.

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

D. The mood symptoms in Criteria A and B are not better accounted for by Schizoaffective Disorder and are not superimposed on Schizophrenia, Schizophreniform Disorder, Delusional Disorder, or Psychotic Disorder Not Otherwise Specified.

E. The symptoms cause clinically significant distress or impairment in social, occupational, or other important areas of functioning.

Specifiers

Chronic
With Catatonic Features
With Melancholic Features
With Atypical Features
With Postpartum Onset
Longitudinal Course Specifiers (With and Without Interepisode Recovery)
With Seasonal Pattern (applies only to the pattern of Major Depressive Episodes)
With Rapid Cycling