
This is a category that includes disorders with bipolar features that do not meet the criteria for any specific Bipolar Disorder. Examples are:
- Very rapid alternation between manic symptoms and depressive symptoms that meet symptom criteria threshold but not duration required.
- Recurrent Hypomanic Episodes without intercurrent depressive symptoms
- A Manic or Mixed Episode superimposed on Delusional Disorder, residual Schizophrenia, Psychotic Disorder Not Otherwise Specified.
- Hypomanic Episodes, along with chronic depressive symptoms that are too infrequent to qualify for a diagnosis of Cyclothymic Disorder.
- Situations in which the clinician has concluded that a Bipolar Disorder but it unstable to determine whether it is primary, due to a general medical condition, or a substance.