Bipolar I disorder (BD-I; pronounced "type one bipolar disorder") is a type of bipolar spectrum disorder characterized by the occurrence of at least one manic episode, with or without mixed or psychotic features.
Bipolar I disorder (BD-I), also known as type one bipolar disorder, is a form of bipolar spectrum disorder that involves experiencing at least one manic episode. This can be accompanied by other symptoms such as mixed states or psychotic episodes.