F31.30 – Bipolar disorder, current episode depressed, mild or moderate severity, unspecified

Learn about the intricacies of the ICD-10-CM code F31.30: Bipolar disorder, current episode depressed, mild or moderate severity, unspecified.

By Karina Jimenea on Jul 16, 2025.

Fact Checked by Ericka Pingol.

Use Code

F31.30 diagnosis code: Bipolar disorder, current episode depressed, mild or moderate severity, unspecified

F31.30 is the ICD-10-CM code used to signify a current episode of depression within bipolar disorder, unspecified as mild or moderate in severity.
Bipolar disorder is a mental condition marked by alternating periods of elation and depression.
This code applies explicitly when the individual is currently in a depressive state but the severity, whether mild or moderate, is unspecified with this code.
Healthcare providers must carefully assess the severity, as it can impact the treatment plan and prognosis.

Is F31.30 billable?

Yes, F31.30 is a billable code. In medical coding and billing, this code is used to specify a diagnosis for reimbursement of services related to this type of bipolar disorder.

Clinical information

Bipolar disorder (formerly manic-depressive illness or manic depression) typically involves recurrent episodes of mania and depression. Still, a patient can be in a depressed, manic, or normal mood state at any given time.
Depression episodes in bipolar disorder can include symptoms like persistent sadness, loss of interest in once-enjoyed activities, changes in sleep and appetite, difficulty concentrating, and feelings of worthlessness.
Bipolar disorder is lifelong, but medications and psychotherapy can manage mood swings and other symptoms.
Treatment for mental and behavioural disorders like bipolar disorder, generally involves mood stabilizers but may also include antipsychotics, antidepressants, psychotherapy, or a combination of these.
Early diagnosis and treatment can help prevent significant disruptions in a person's life.

Synonyms include

Bipolar affective disorder, current episode depression
Bipolar disorder, depressed
Depressed bipolar I disorder
Bipolar type 1 disorder, depressed

Other ICD-10 codes commonly used for bipolar disorder

F31.10: Bipolar disorder, current episode manic without psychotic features, unspecified
F31.31: Bipolar disorder, current episode depressed, mild
F31.32: Bipolar disorder, current episode depressed, moderate
F31.4: Bipolar disorder, current episode depressed, severe, without psychotic features
F31.5: Bipolar disorder, current episode depressed, severe, with psychotic features
F31.60: Bipolar disorder, current episode mixed, unspecified
F31.9: Bipolar disorder, unspecified

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