VITiếng Việt
ICD-10 Vietnam

A39.9Meningococcal infection, unspecified

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 I
Certain infectious and parasitic diseases
Group A30-A49
Other bacterial diseases
Official Vietnamese name
Nhiễm não mô cầu, không xác định
Additional WHO coding guidance
Meningococcal disease NOS

Related A39 codes

A39 Meningococcal infection A39.0 Primary diagnosis candidate Meningococcal meningitis (G01*) A39.1 Primary diagnosis candidate Waterhouse- Friderichsen syndrome (E35.1*) A39.2 Primary diagnosis candidate Acute meningococcaemia A39.3 Primary diagnosis candidate Chronic meningococcaemia A39.4 Primary diagnosis candidate Meningococcaemia, unspecified A39.5 Primary diagnosis candidate Meningococcal heart disease A39.8 Primary diagnosis candidate Other meningococcal infections

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.