N26Unspecified contracted kidney
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 XIV
- Diseases of the genitourinary system
- Group N25-N29
- Other disorders of kidney and ureter
- Official Vietnamese name
- Thận nhỏ không xác định
- Additional WHO coding guidance
- Incl.: Atrophy of kidney (terminal) Renal sclerosis NOS Excl.: contracted kidney due to hypertension (I12.-) diffuse sclerosing glomerulonephritis (N18.-) hypertensive nephrosclerosis (arteriolar) (arteriosclerotic) (I12.-) small kidney of
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.
