C34.3Lower lobe, bronchus or lung
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 II
- Neoplasms
- Group C00-C97
- Malignant neoplasms U ác tính
- Official Vietnamese name
- U ác tính ở thùy dưới, phế quản hoặc phổi
Related C34 codes
C34
Malignant neoplasm of bronchus and lung
C34.0
Primary diagnosis candidate
Main bronchus
C34.1
Primary diagnosis candidate
Upper lobe, bronchus or lung
C34.2
Primary diagnosis candidate
Middle lobe, bronchus or lung
C34.8
Primary diagnosis candidate
Overlapping lesion of bronchus and lung
C34.9
Primary diagnosis candidate
Bronchus or lung, 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.
