T78Adverse effects, not elsewhere classified
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 T78 directly
Use the most specific code supported by the record.
- Group T66-T78
- Other and unspecified effects of external causes
- Official Vietnamese name
- Tác dụng bất lợi, không phân loại mục khác
- Additional WHO coding guidance
- Note: This category is to be used as the primary code to identify the effects, not elsewhere classifiable, of unknown, undetermined or ill- defined causes. For multiple coding purposes this category may be used as an additional code to identify the effects of conditions classified elsewhere. Excl.: complications of surgical and medical care NEC (T80-T88)
Related T78 codes
T78.0
Primary diagnosis candidate
Anaphylactic shock due to adverse food reaction
T78.1
Primary diagnosis candidate
Other adverse food reactions, not elsewhere classified
T78.2
Primary diagnosis candidate
Anaphylactic shock, unspecified
T78.3
Primary diagnosis candidate
Angioneurotic oedema
T78.4
Primary diagnosis candidate
Allergy, unspecified Allergic reaction NOS
T78.8
Primary diagnosis candidate
Other adverse effects, not elsewhere classified
T78.9
Primary diagnosis candidate
Adverse effect, 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.
