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F31.3

⚠ Non-billable (Header)

Bipolar disorder, current episode depressed, mild or moderate severity

Mental, Behavioral and Neurodevelopmental disorders (F01-F99)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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❌ Excludes1

inherited from F31

Rules from parent category F31: Bipolar disorder

  • • bipolar disorder, single manic episode (F30.-)
  • • major depressive disorder, single episode (F32.-)
  • • major depressive disorder, recurrent (F33.-)

⚠️ Excludes2

inherited from F31

Rules from parent category F31: Bipolar disorder

  • • cyclothymia (F34.0)

Child Codes (3)

F31.30Bipolar disorder, current episode depressed, mild or moderate severity, unspecifiedF31.31Bipolar disorder, current episode depressed, mildF31.32Bipolar disorder, current episode depressed, moderate

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Code Information

CodeF31.3
BillableNo — Header code
ParentF31
CategoryMental, Behavioral and Neurodevelopmental disorders (F01-F99)
Excludes13 rule(s)
Excludes21 note(s)
Child codes3

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)