W94Exposure to high and low air pressure and changes in air pressure
Code usage status
Primary diagnosis
Must not 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.
- Group V01-X59
- Accidents
- Official Vietnamese name
- Tiếp xúc với áp suất không khí cao và/hoặc thấp và/hoặc thay đổi áp suất không khí
- Additional WHO coding guidance
- Incl.: high air pressure from rapid descent in water reduction in atmospheric pressure while surfacing from: deep- water diving underground residence or prolonged visit at high altitude as the cause of: anoxia barodontalgia barotitis hypoxia mountain sickness sudden change
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.
