F31.30 ICD-10-CM

ICD-10-CM code F31.30 describes bipolar disorder, current episode depressed, mild or moderate severity, unspecified. Bipolar I in a current depressive episode of mild/moderate severity. It is a billable, specific code valid for claim submission. It is grouped under the “Mood Disorders” section of the mental, behavioral, and neurodevelopmental disorders chapter.

When to use F31.30

This group covers depressive disorders, bipolar disorders, cyclothymia, and persistent depressive disorder. Select single versus recurrent, severity, and remission status, and note psychotic features when present. For F31.30 specifically, bipolar i in a current depressive episode of mild/moderate severity.

Documentation & billing

Document the episode type (single versus recurrent), severity, and any psychotic features or remission status. Use the most specific code the record supports instead of defaulting to an unspecified code.

Common pitfalls

• Defaulting to unspecified depression (F32.9 or F32.A) when severity is documented.
• Confusing bipolar I (with manic episodes) with bipolar II (hypomanic plus depressive episodes).
• Omitting psychotic-feature or remission modifiers.

Common search terms for F31.30

Clinicians often look up F31.30 using plain-language terms. This code maps to:

Frequently asked questions