LB31.8

ICD-11 MMS 2026-01

Atresia or stenosis of ureter

Description

A condition caused by blockage or narrowing of the ureter due to failure to correctly develop during the antenatal period. This condition may present with bladder outlet obstruction, low amniotic fluid volume, pulmonary hypoplasia, megacystis, hydroureter, hydronephrosis, or renal dysplasia.

Index terms

  • Atresia or stenosis of ureter
  • Congenital atresia of ureter
  • atresia of ureter
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  • Ureteropelvic junction atresia
  • Ureterovesical orifice atresia
  • Congenital occlusion of ureter
  • Impervious ureter
  • congenital stricture of ureter
  • congenital ureter obstruction
  • congenital ureteric stenosis
  • Congenital occlusion of ureteropelvic junction
  • Congenital occlusion of ureterovesical orifice

Exclusions from above levels

  • http://id.who.int/icd/entity/733825440 – Inborn errors of metabolism

Sibling codes

  • LB31.0 – Congenital hydronephrosis
  • LB31.1 – Congenital primary megaureter
  • LB31.2 – Fetal lower urinary tract obstruction
  • LB31.3 – Exstrophy of urinary bladder
  • LB31.4 – Congenital diverticulum of urinary bladder
  • LB31.5 – Duplication of urethra
  • LB31.6 – Congenital megalourethra
  • LB31.7 – Megacystis-megaureter
  • LB31.9 – Agenesis of ureter
  • LB31.A – Duplication of ureter
  • LB31.B – Malposition of ureter
  • LB31.C – Congenital absence of bladder or urethra
  • LB31.D – Congenital vesico-uretero-renal reflux
  • LB31.Y – Other specified structural developmental anomalies of urinary tract
  • LB31.Z – Structural developmental anomalies of urinary tract, unspecified

Foundation entity

Atresia or stenosis of ureter – http://id.who.int/icd/entity/1432720737

Allowed postcoordination axes

Part of: LB31: Structural developmental anomalies of urinary tract › 20: Developmental anomalies