J18.1Lobar pneumonia, 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 X
- Diseases of the respiratory system
- Group J09-J18
- Influenza and pneumonia
- Official Vietnamese name
- Viêm phổi thùy, không xác định vi sinh vật
Related J18 codes
J18
Pneumonia, organism unspecified
J18.0
Primary diagnosis candidate
Bronchopneumonia, unspecified
J18.2
Primary diagnosis candidate
Hypostatic pneumonia, unspecified
J18.8
Primary diagnosis candidate
Other pneumonia, organism unspecified
J18.9
Popular lookup
Primary diagnosis candidate
Pneumonia, 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.
