B34Viral infection of unspecified site
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 B34 directly
Use the most specific code supported by the record.
- Group B25-B34
- Other viral diseases
- Official Vietnamese name
- Nhiễm virus ở vị trí không xác định
- Additional WHO coding guidance
- Excl.: cytomegaloviral disease NOS (B25.9) herpesvirus [herpes simplex] infection NOS (B00.9) retrovirus infection NOS (B33.3) viral agents as the cause of diseases classified to other chapters (B97.-)
Related B34 codes
B34.0
Primary diagnosis candidate
Adenovirus infection, unspecified site
B34.1
Primary diagnosis candidate
Enterovirus infection, unspecified site
B34.2
Primary diagnosis candidate
Coronavirus infection, unspecified site
B34.3
Primary diagnosis candidate
Parvovirus infection, unspecified site
B34.4
Primary diagnosis candidate
Papovavirus infection, unspecified site
B34.8
Primary diagnosis candidate
Other viral infections of unspecified site
B34.9
Primary diagnosis candidate
Viral infection, 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.
