N18Chronic kidney disease
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 N18 directly
Use the most specific code supported by the record.
- Chapter XIV
- Diseases of the genitourinary system
- Group N17-N19
- Renal failure
- Official Vietnamese name
- Bệnh thận mạn tính
- Additional WHO coding guidance
- Incl.: chronic renal failure Use additional code, if desired, to identify underlying disease. Use additional code, if desired, to identify presence of hypertension.
Related N18 codes
N18.1
Primary diagnosis candidate
Chronic kidney disease, stage 1
N18.2
Primary diagnosis candidate
Chronic kidney disease, stage 2
N18.3
Primary diagnosis candidate
Chronic kidney disease, stage 3
N18.4
Primary diagnosis candidate
Chronic kidney disease, stage 4
N18.5
Primary diagnosis candidate
Chronic kidney disease, stage 5
N18.9
Primary diagnosis candidate
Chronic kidney disease, 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.
