F Code for Bipolar Disorder
ICD-10 Classification
Bipolar disorder is classified under F31 in the ICD-10 coding system 1.
The ICD-10 (International Classification of Diseases, 10th Revision) uses the following F codes for bipolar disorder and related conditions 1:
Primary Bipolar Disorder Codes
- F31 - Bipolar affective disorder (the main category for bipolar disorder) 1
- F31.0 - Bipolar affective disorder, current episode hypomanic 1
- F31.1 - Bipolar affective disorder, current episode manic without psychotic symptoms 1
- F31.2 - Bipolar affective disorder, current episode manic with psychotic symptoms 1
- F31.3 - Bipolar affective disorder, current episode mild or moderate depression 1
- F31.4 - Bipolar affective disorder, current episode severe depression without psychotic symptoms 1
- F31.5 - Bipolar affective disorder, current episode severe depression with psychotic symptoms 1
- F31.6 - Bipolar affective disorder, current episode mixed 1
- F31.7 - Bipolar affective disorder, currently in remission 1
- F31.8 - Other bipolar affective disorders 1
- F31.9 - Bipolar affective disorder, unspecified 1
Related Cyclothymic Disorder Code
- F34.0 - Cyclothymia (cyclothymic disorder) 1
Key ICD-10 Diagnostic Requirements
The ICD-10 system describes bipolar I disorder as an episodic illness with bouts of mania and depression, requiring that manic episodes last 1 week or more 1. This is consistent with DSM-IV-TR criteria, which also requires manic episodes to last at least 7 days unless hospitalization is required 1.
Transition to ICD-11
ICD-11 has introduced significant changes to the classification system, including dimensional expansions for severity, course, and specific symptoms for bipolar disorders 1. The categorical approach was largely maintained, but with added dimensional qualifiers for depressive episodes including melancholic features, anxiety symptoms, panic attacks, seasonal pattern, severity ratings (mild, moderate, severe), and remission status 1.