VITiếng Việt
ICD-10 Vietnam

N11.1Chronic obstructive pyelonephritis

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 N10-N16
Renal tubulo- interstitial diseases
Official Vietnamese name
Viêm thận bể thận mạn tính do tắc nghẽn
Additional WHO coding guidance
Pyelonephritis (chronic) associated with: anomaly of pelviureteric junction anomaly of pyeloureteric junction anomaly of ureter kinking of pelviureteric junction kinking of pyeloureteric junction kinking of ureter obstruction of pelviureteric junction obstruction of pyeloureteric junction obstruction of ureter stricture of pelviureteric junction stricture of pyeloureteric junction stricture of ureter Excl.: calculous pyelonephritis (N20.9) obstructive

Related N11 codes

N11 Chronic tubulo- interstitial nephritis N11.0 Primary diagnosis candidate Nonobstructive reflux-associated chronic pyelonephritis N11.8 Primary diagnosis candidate Other chronic tubulo-interstitial nephritis N11.9 Primary diagnosis candidate Chronic tubulo- interstitial nephritis, 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.