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F33.9

✓ Billable

Major depressive disorder, recurrent, unspecified

Mental, Behavioral and Neurodevelopmental disorders (F01-F99)

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Also Known As

Monopolar depression NOS

❌ Excludes1

inherited from F33

Rules from parent category F33: Major depressive disorder, recurrent

  • • bipolar disorder (F31.-)
  • • manic episode (F30.-)

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Code Information

CodeF33.9
BillableYes
ParentF33
CategoryMental, Behavioral and Neurodevelopmental disorders (F01-F99)
Excludes12 rule(s)
Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)