ICD-10 Code F33.9 – Major depressive disorder, recurrent, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F33.9 – Major depressive disorder, recurrent, unspecified
What it is
F33.9 identifies a recurrent major depressive disorder when the current episode is documented as unspecified. Use it when depression has returned in a patient with prior episodes, but the record does not give further episode detail.
Clinical signs
Clinical features vary; refer to documentation. Standard references describe depressed mood, loss of interest, sleep or appetite changes, fatigue, poor concentration, and possible guilt or hopelessness during a recurrent episode.
When to use this code
Use this code when the chart clearly supports recurrent major depressive disorder, but the provider does not specify the current episode severity or other details. It also fits when the diagnosis is recorded as recurrent and unspecified in the assessment or problem list.
Check documentation if the note describes a single episode, remission status, or a different depressive disorder subtype. You should code the most specific documented depressive diagnosis available.
Do not use for
Do not use F33.9 for a first episode of major depressive disorder or for depressive disorders that are better described by another code. Check documentation if the record names bipolar disorder, adjustment disorder, or another primary condition.
Coding tip
Assign F33.9 only when both recurrence and unspecified episode detail are supported; otherwise, query for specificity.