F31Bipolar affective disorder
Code usage status
Primary diagnosis
Select a more specific code
Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Do not use F31 directly
Use the most specific code supported by the record.
- Chapter V
- Mental and behavioural disorders
- Group F30-F39
- Mood [affective] disorders
- Official Vietnamese name
- Rối loạn cảm xúc lưỡng cực
- Additional WHO coding guidance
- A disorder characterized by two or more episodes in which the patient's mood and activity levels are significantly disturbed, this disturbance consisting on some occasions of an elevation of mood and increased energy and activity (hypomania or mania) and on others of a lowering of mood and decreased energy and activity (depression). Repeated episodes of hypomania or mania only are classified as bipolar. Incl.: manic depression manic-depressive: illness psychosis reaction Excl.: bipolar disorder, single manic episode (F30.-) cyclothymia (F34.0)
Related F31 codes
F31.0
Primary diagnosis candidate
Bipolar affective disorder, current episode hypomanic
F31.1
Primary diagnosis candidate
Bipolar affective disorder, current episode manic without psychotic symptoms
F31.2
Primary diagnosis candidate
Bipolar affective disorder, current episode manic with psychotic symptoms
F31.3
Primary diagnosis candidate
Bipolar affective disorder, current episode mild or moderate depression
F31.4
Primary diagnosis candidate
Bipolar affective disorder, current episode severe depression without psychotic symptoms
F31.5
Primary diagnosis candidate
Bipolar affective disorder, current episode severe depression with psychotic symptoms
F31.6
Primary diagnosis candidate
Bipolar affective disorder, current episode mixed
F31.7
Primary diagnosis candidate
Bipolar affective disorder, currently in remission
F31.8
Primary diagnosis candidate
Other bipolar affective disorders
F31.9
Primary diagnosis candidate
Bipolar 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.
