Why Are There so Many Classifications of Bipolar Disorder?

Depressed woman with head in hands
Tom Merton / Getty Images

When evaluating symptoms and giving names to bipolar disorder—formerly known as manic depression—and bipolar disorder's many subsets, there are no absolutes.

In their book, We Heard the Angels of Madness, authors Diane and Lisa Berger describe bipolar disorder as "a virulent disorder with many faces" and liken it to the multi-headed Hydra of Greek mythology. Just as the Hydra sprouted several new heads for each one slain, researchers and clinicians find that for each new fact learned about bipolar disorder, more questions are raised. Symptoms are different from one person to the next. The severity of symptoms also differs.

Thus, researchers, clinicians, and practitioners face a wide array of challenges in order to "codify" each diagnosis. In response, classification systems, subsets, and specifiers have been developed in an attempt to standardize the diagnostic process.

In the United States, the primary system is the one found in The Diagnostic and Statistical Manual of Mental Disorders also known as the DSM-5.

Bipolar Disorder in the DSM-5

In the previous version of the DSM (the DSM-IV), bipolar disorder was categorized in the section that included depressive disorders, substance-induced mood disorders, and mood disorders due to a general medical condition. The most recent version of the DSM, the DSM-5, now places bipolar and related disorders in their own disorder class. This category includes bipolar I, bipolar II, and cyclothymic disorder.

A number of additional specifiers also exist:

  • Bipolar disorder with mixed features
  • Bipolar disorder with anxious distress
  • Bipolar disorder with melancholic features
  • Bipolar disorder with atypical features
  • Bipolar disorder with psychotic features
  • Bipolar disorder with catatonic features

Specifiers are diagnostic extensions that help clarify the course, features, or severity of the condition.

ICD-10 Listing - Mood Disorders

The International system is the ICD-10, The International Statistical Classification of Diseases and Related Health Problems, tenth revision. The ICD-10 provides a structure of "families" or related disorders and breaks them down initially into many more categories than does the DSM-IV. Bipolar disorder is within the family of mood (affective) disorders.

  • Manic Episode
  • Hypomania
  • Mania without psychotic symptoms
  • Mania with psychotic symptoms
  • Other manic episodes
  • Manic episode, unspecified
  • Bipolar Affective Disorder
  • Current episode hypomanic
  • Current episode manic without psychotic symptoms
  • Current episode manic with psychotic symptoms
  • Current episode mild or moderate depression
  • Current episode severe depression without psychotic symptoms
  • Current episode severe depression with psychotic symptoms
  • Current episode mixed
  • Currently in remission
  • Other bipolar affective disorders
  • Bipolar affective disorder, unspecified
  • Depressive Episode
  • Mild depressive episode
  • Moderate depressive episode
  • Severe depressive episode without psychotic symptoms
  • Severe depressive episode with psychotic symptoms
  • Other depressive episodes
  • Depressive episode, unspecified
  • Recurrent Depressive Disorder
  • Current episode mild
  • Current episode moderate
  • Current episode severe without psychotic symptoms
  • Current episode severe with psychotic symptoms
  • Currently in remission
  • Other recurrent depressive disorders
  • Unspecified
  • Persistent Mood [Affective] Disorders
  • Cyclothymia
  • Dysthymia
  • Other persistent mood [affective] disorders
  • Unspecified
  • Other Mood [Affective] Disorders
  • Unspecified Mood [Affective] Disorder

Other Classifications

In addition to the two formally recognized diagnostic classifications outlined above, there are quite a few other descriptive systems to be found in the literature. Many of these have been developed by researchers for specific projects or presented as possible alternatives as more is learned about these disorders. One such classification system is that of Young and Klerman who distinguish between six subtypes of manic depression.

Young and Klerman Subtypes

  • Bipolar I - Mania and Major Depression
  • Bipolar II - Hypomania and Major Depression
  • Bipolar III - Cyclothymia
  • Bipolar IV - Antidepressant-Induced Hypo/mania
  • Bipolar V - Major Depression with a family history of Bipolar Disorder
  • Bipolar VI - Unipolar Mania
Was this page helpful?
0 Sources
Verywell Mind uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.