F42Obsessive- compulsive disorder
Code usage status
Primary diagnosis
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Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Do not use F42 directly
Use the most specific code supported by the record.
- Chapter V
- Mental and behavioural disorders
- Group F40-F48
- Neurotic, stress- related and somatoform disorders
- Official Vietnamese name
- Rối loạn ám ảnh cưỡng chế
- Additional WHO coding guidance
- The essential feature is recurrent obsessional thoughts or compulsive acts. Obsessional thoughts are ideas, images, or impulses that enter the patient's mind again and again in a stereotyped form. They are almost invariably distressing and the patient often tries, unsuccessfully, to resist them. They are, however, recognized as his or her own thoughts, even though they are involuntary and often repugnant. Compulsive acts or rituals are stereotyped behaviours that are repeated again and again. They are not inherently enjoyable, nor do they result in the completion of inherently useful tasks. Their function is to prevent some objectively unlikely event, often involving harm to or caused by
Related F42 codes
F42.0
Primary diagnosis candidate
Predominantly obsessional thoughts or ruminations
F42.1
Primary diagnosis candidate
Predominantly compulsive acts [obsessional rituals]
F42.2
Primary diagnosis candidate
Mixed obsessional thoughts and acts
F42.8
Primary diagnosis candidate
Other obsessive- compulsive disorders
F42.9
Primary diagnosis candidate
Obsessive- compulsive 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.
