C11Malignant neoplasm of nasopharynx
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 C11 directly
Use the most specific code supported by the record.
- Chapter II
- Neoplasms
- Group C00-C97
- Malignant neoplasms U ác tính
- Official Vietnamese name
- U ác tính ở mũi - hầu
Related C11 codes
C11.0
Primary diagnosis candidate
Superior wall of nasopharynx
C11.1
Primary diagnosis candidate
Posterior wall of nasopharynx
C11.2
Primary diagnosis candidate
Lateral wall of nasopharynx
C11.3
Primary diagnosis candidate
Anterior wall of nasopharynx
C11.8
Primary diagnosis candidate
Overlapping lesion of nasopharynx
C11.9
Primary diagnosis candidate
Nasopharynx, 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.
