T31Burns classified according to extent of body surface involved
Code usage status
Primary diagnosis
Select a more specific code
Apply only when it matches the confirmed diagnosis and the documented clinical record.
Specificity
Do not use T31 directly
Use the most specific code supported by the record.
- Group T20-T32
- Burns and corrosions
- Official Vietnamese name
- Phân loại bỏng theo diện tích bề mặt cơ thể bị tổn thương
- Additional WHO coding guidance
- Note: This category is to be used as the primary code only when the site of the burn is unspecified. It may be used as a supplementary code, if desired, with categories T20-T25 or T29 when the site is specified.
Related T31 codes
T31.0
Primary diagnosis candidate
Burns involving less than 10% of body surface
T31.1
Primary diagnosis candidate
Burns involving 10- 19% of body surface
T31.2
Primary diagnosis candidate
Burns involving 20- 29% of body surface
T31.3
Primary diagnosis candidate
Burns involving 30- 39% of body surface
T31.4
Primary diagnosis candidate
Burns involving 40- 49% of body surface
T31.5
Primary diagnosis candidate
Burns involving 50- 59% of body surface
T31.6
Primary diagnosis candidate
Burns involving 60- 69% of body surface
T31.7
Primary diagnosis candidate
Burns involving 70- 79% of body surface
T31.8
Primary diagnosis candidate
Burns involving 80- 89% of body surface
T31.9
Primary diagnosis candidate
Burns involving 90% or more of body surface
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.
