ICD-10 Code F31.71 – Bipolar disorder, in partial remission, most recent episode hypomanic (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F31.71 – Bipolar disorder, in partial remission, most recent episode hypomanic
What it is
F31.71 identifies bipolar disorder with a recent hypomanic episode that is now in partial remission. You use it when the condition is improved but not fully resolved, and the record supports ongoing bipolar illness.
Clinical signs
Clinical features may include a history of hypomanic symptoms such as elevated mood, increased energy, reduced need for sleep, or increased activity. In partial remission, some symptoms persist or the episode has not fully returned to baseline; check documentation.
When to use this code
Use this code when the provider documents bipolar disorder, partial remission, and the most recent episode as hypomanic. It fits follow-up visits, ongoing psychiatric management, or assessments where the acute hypomanic state has improved but the diagnosis remains active.
Code it only when the note clearly links partial remission to the bipolar disorder history. If the record does not specify the most recent episode or remission status, check documentation before assigning F31.71.
Do not use for
Do not use this code for bipolar disorder with a current manic, depressive, or mixed episode. It is also incorrect when the chart only states bipolar disorder without remission detail.
Coding tip
Look for the exact phrase “in partial remission” and confirm the most recent episode was hypomanic before coding.