Friday, Jul 24, 2026 The claims desk. Receipts included. POWERED BY LENZ
IsThis

HEALTH

The Claim

Bipolar disorder is characterized by episodes of mania or hypomania and episodes of depression.

The Short Version

This is a generally accurate description of bipolar disorder, but it is not a universal diagnostic rule. Major medical sources describe bipolar disorder as involving periods of mania or hypomania and depression, yet Bipolar I can be diagnosed without any prior depressive episode. The claim is best read as a broad characterization rather than a strict criterion.

Caveats

  • For Bipolar I disorder, a depressive episode is common but not required for diagnosis; mania alone can establish the diagnosis.
  • Bipolar II differs from Bipolar I: it requires hypomania plus major depression, so subtype distinctions matter.
  • The claim omits mixed features or mixed episodes, which are also clinically important presentations in bipolar disorders.

The Receipts

  1. 6A60 Bipolar type I disorder (ICD-11 browser entry)

    World Health Organization (ICD-11)

  2. Bipolar Disorder

    National Institute of Mental Health (NIMH)

  3. Bipolar disorder

    World Health Organization (WHO)

  4. Diagnosing bipolar disorders: ICD-11 and beyond

    National Institutes of Health / World Psychiatry

  5. Symptoms of Bipolar Disorder May Go Undiagnosed in Some Adults with Major Depression

    National Institute of Mental Health (NIMH)

  6. Bipolar disorder in the International Classification of Diseases, 11th revision: a review of changes and their implications

    National Institutes of Health / Brazilian Journal of Psychiatry

  7. Bipolar Disorders

    Merck Manual Professional Edition

  8. Bipolar Disorders: Evaluation and Treatment

    American Academy of Family Physicians (AAFP)

  9. CE corner: Diagnosing and treating bipolar spectrum disorders

    American Psychological Association

  10. Bipolar Disorders (Armed Forces Health Surveillance Division case definition document)

    U.S. Department of Defense / Health.mil

+ 14 more sources — see the full list on Lenz

Filed Under

Bipolar DisorderDepressionHypomaniaMania

More Fact Checks