J40Bronchitis, not specified as acute or chronic
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 X
- Diseases of the respiratory system
- Group J40-J47
- Chronic lower respiratory diseases
- Official Vietnamese name
- Viêm phế quản, không xác định được là cấp tính hoặc mạn tính
- Additional WHO coding guidance
- Note: Bronchitis not specified as acute or chronic in those under 15 years of age can be assumed to be of acute nature and should be classified to J20.++ Incl.: Bronchitis: NOS catarrhal with tracheitis NOS Tracheobronchitis NOS Excl.: bronchitis: allergic NOS (J45.0) asthmatic NOS (J45.9) chemical (acute) (J68.0)
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.
