F42.1Predominantly compulsive acts [obsessional rituals]
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 F40-F48
- Neurotic, stress- related and somatoform disorders
- Official Vietnamese name
- Hành vi cưỡng chế chủ yếu [nghi thức ám ảnh]
- Additional WHO coding guidance
- The majority of compulsive acts are concerned with cleaning (particularly handwashing), repeated checking to ensure that a potentially dangerous situation has not been allowed to develop, or orderliness and tidiness. Underlying the overt behaviour is a fear, usually of danger either to or caused by the patient, and the ritual is an ineffectual or symbolic
Related F42 codes
F42
Obsessive- compulsive disorder
F42.0
Primary diagnosis candidate
Predominantly obsessional thoughts or ruminations
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.
