F31 is the ICD-10 code for Bipolar affective disorder. It is a three-character category divided into 10 subcodes; use the subcode whenever the record supports that level of detail. It belongs to the block F30–F39 (Mood [affective] disorders) in Chapter V, Mental and behavioural disorders.
- Code type
- Category (3 characters)
- Chapter
- V · F00–F99
- Classification
- WHO ICD-10, 2019 version
Definition
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.
What F31 includes
Conditions and terms that are coded here.
- manic depression
- manic-depressive:
- illness
- psychosis
- reaction
What F31 excludes
Conditions that look similar but belong under another code.
Subcodes of F31
- F31.0Bipolar affective disorder, current episode hypomanic
- F31.1Bipolar affective disorder, current episode manic without psychotic symptoms
- F31.2Bipolar affective disorder, current episode manic with psychotic symptoms
- F31.3Bipolar affective disorder, current episode mild or moderate depression
- F31.4Bipolar affective disorder, current episode severe depression without psychotic symptoms
- F31.5Bipolar affective disorder, current episode severe depression with psychotic symptoms
- F31.6Bipolar affective disorder, current episode mixed
- F31.7Bipolar affective disorder, currently in remission
- F31.8Other bipolar affective disorders
- F31.9Bipolar affective disorder, unspecified
F31 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
DF31Bipolar affektiv sindslidelse
F31Kaksisuuntainen mielialahäiriö
F31Bipolare affektive Störung
F31Trouble affectif bipolaire
F31bipolaire affectieve stoornis [manisch-depressieve stoornis]
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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