ICD-10 Code F31.0 – Bipolar disorder, current episode hypomanic (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F31.0 – Bipolar disorder, current episode hypomanic
What it is
F31.0 identifies bipolar disorder with a current hypomanic episode. Use it when the patient has a documented bipolar disorder history and the present mood state is hypomanic, not full mania or depression.
Clinical signs
Typical findings include elevated or irritable mood, increased energy, reduced need for sleep, and more talkative or goal-directed behavior. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly states bipolar disorder and the current episode is hypomanic. It fits outpatient, inpatient, or emergency documentation when the clinician describes hypomania as the active episode. Check documentation if the episode type is unclear or mixed.
Do not use for
Do not use F31.0 for major depressive episodes, mixed episodes, or full manic episodes. If the note only says “bipolar disorder” without the current episode, check documentation.
Coding tip
Code the current episode exactly as documented and confirm whether hypomania is specified, since that determines F31.0.