F31.62 – Bipolar disorder, current episode mixed, moderate

F31.62 Diagnosis code: Bipolar disorder, current episode mixed, moderate

Bipolar disorder is a condition recognized in the Diagnostic and Statistical Manual of Mental Disorders (DSM-5). It marked by recurring episodes of extreme mood changes that impact a person's energy levels, emotions, and daily functioning.

The ICD-10-CM code F31.62 is used to classify bipolar disorder, where the current episode is mixed and of moderate severity. This condition is characterized by the presence of both manic and depressive symptoms occurring simultaneously or in rapid alternation during the same mood episode.

In this case, the episode is moderate, meaning the patient’s symptoms are more intense than mild but not yet severe enough to meet criteria for psychotic features or necessitate hospitalization. A mixed episode can include increased energy levels, irritability, pressured speech, and impulsivity alongside low mood, fatigue, and feelings of worthlessness.

F31.62 applies specifically to bipolar I disorder, not bipolar II disorder, which includes hypomanic episodes and at least one major depressive episode, but no full manic episode. This code is important for diagnosis, tracking disease severity, and guiding treatment decisions such as the use of mood stabilizers, antipsychotics, and psychotherapy.

Early recognition and accurate coding help prevent worsening symptoms and allow clinicians to better manage medical conditions that may be associated with mood dysregulation.

Is the F31.62 billable?

Yes, F31.62 is a billable/specific ICD-10-CM diagnosis code accepted for reimbursement purposes. Accurate coding is essential for appropriate treatment planning and reflects the specificity of the condition involving a current mixed episode of bipolar disorder.

Clinical information

Bipolar disorder, current episode mixed, moderate, involves simultaneous symptoms of mania (e.g., elevated mood, increased energy) and depression (e.g., feelings of sadness, hopelessness).  

Diagnosis requires careful assessment to differentiate from other mental disorders and to determine the appropriate treatment approach. If a person has a mixed bipolar disorder episode, they will likely have the following symptoms:

• Having rapid and uncontrollable thoughts
• Engaging in fast and loud speech
• Feeling restless and having a strong desire to be active and go out
• Experiencing a decrease in sleep or requiring less sleep than usual
• Feeling an inflated sense of self-importance to varying degrees
• Experiencing intense irritability
• Displaying a tendency to engage in excessive or risky behaviors
• Feeling deep sadness
• Experiencing feelings of despair
• Feeling lonely and occasionally isolating themselves
• Experiencing a significant lack of energy
• Sleeping excessively
• Experiencing changes in appetite, either eating too little or too much
• Feeling disinterested in almost everything
• Having thoughts of self-harm

Synonyms include:

• Bipolar 1 disorder, mixed, moderate
• Moderate mixed bipolar I disorder

Other ICD-10 codes commonly used for bipolar disorder

• F31.6: Bipolar disorder, current episode mixed
• F31.60: Bipolar disorder, current episode mixed, unspecified
• F31.61: Bipolar disorder, current episode mixed, mild
• F31.63: Bipolar disorder, current episode mixed, severe, without psychotic features
• F31.64: Bipolar disorder, current episode mixed, severe, with psychotic features
• F31.77: Bipolar disorder, in partial remission, most recent episode mixed
• F31.78: Bipolar disorder, in full remission, most recent episode mixed