VITiếng Việt
ICD-10 Vietnam

F34.1Dysthymia

Code usage status

Primary diagnosis

May be used as the primary diagnosis

Apply only when it matches the confirmed diagnosis and the documented clinical record.

Specificity

Complete code in the classification

Use when the diagnosis matches and no exclusion applies.

Chapter V
Mental and behavioural disorders
Group F30-F39
Mood [affective] disorders
Official Vietnamese name
Trầm cảm dai dẳng
Additional WHO coding guidance
A chronic depression of mood, lasting at least several years, which is not sufficiently severe, or in which individual episodes are not sufficiently prolonged, to justify a diagnosis of severe, moderate, or mild recurrent depressive disorder (F33.-). Depressive: neurosis personality disorder Neurotic depression Persistent anxiety depression Excl.: anxiety depression (mild or not persistent)

Related F34 codes

F34 Persistent mood [affective] disorders F34.0 Primary diagnosis candidate Cyclothymia F34.8 Primary diagnosis candidate Other persistent mood [affective] disorders F34.9 Primary diagnosis candidate Persistent mood [affective] disorder, unspecified

Clinical record checklist

View coding guide →
  • Confirm that the code matches the final documented diagnosis.
  • Use one primary-diagnosis code and record only relevant additional conditions.
  • Review Ministry indicators, inclusions, exclusions and notes.
  • Do not infer a diagnosis beyond the clinical record.

2026 regulatory basis

Indicators are taken from columns 24–29 of the classification accompanying Circular 06/2026/TT-BYT, cross-referenced with Decision 1849/QĐ-BYT and Official Dispatch 4059/BYT-BH.