F18.9Mental and behavioural disorders due to use of volatile solvents, unspecified mental and behavioural disorder
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
- Official Vietnamese name
- Rối loạn tâm thần và/hoặc hành vi do sử dụng dung môi dễ bay hơi, rối loạn hành vi và/hoặc tâm thần không xác định
Related F18 codes
F18
Mental and behavioural disorders due to use of volatile solvents
F18.0
Primary diagnosis candidate
Mental and behavioural disorders due to use of volatile solvents, acute intoxication
F18.1
Primary diagnosis candidate
Mental and behavioural disorders due to use of volatile solvents, harmful use
F18.2
Primary diagnosis candidate
Mental and behavioural disorders due to use of volatile solvents, dependence syndrome
F18.3
Primary diagnosis candidate
Mental and behavioural disorders due to use of volatile solvents, withdrawal state
F18.4
Primary diagnosis candidate
Mental and behavioural disorders due to use of volatile solvents, withdrawal state with delirium
F18.5
Primary diagnosis candidate
Mental and behavioural disorders due to use of volatile solvents, psychotic disorder
F18.6
Primary diagnosis candidate
Mental and behavioural disorders due to use of volatile solvents, amnesic syndrome
F18.7
Primary diagnosis candidate
Mental and behavioural disorders due to use of volatile solvents, residual and late-onset psychotic disorder
F18.8
Primary diagnosis candidate
Mental and behavioural disorders due to use of volatile solvents, other mental and behavioural disorders
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.
