GB56

ICD-11 MMS 2026-01

Obstructive or reflux nephropathy

Description

Distention of the pelvis and calices of the kidney with urine as a result of obstruction of the ureter or as a result of a vesicoureteral or vesicoureterorenal reflux of urine. Diffuse or focal cortical scarring and chronic tubulointerstitial nephritis may be present.

Excludes

  • GB55 – Obstructive pyelonephritis
  • http://id.who.int/icd/entity/1746821938 – Calculus of kidney and ureter without hydronephrosis

Exclusions from above levels

  • 4A43.2Y – Sjögren syndrome with renal tubulo-interstitial disorders
  • 4B22 – Renal tubulo-interstitial disorders in simple cryoglobulinaemia
  • 5C60.1 – Renal tubulo-interstitial disorders in cystinosis
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  • GB82 – Autosomal dominant tubulointerstitial disease
  • GB90.Y – pyeloureteritis cystica
  • 01 – Certain infectious or parasitic diseases
  • 05 – Endocrine, nutritional or metabolic diseases
  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 22 – Injury, poisoning or certain other consequences of external causes

Child codes

  • GB56.0 – Hydronephrosis with ureteropelvic junction obstruction
  • GB56.1 – Hydronephrosis with ureteral obstruction
  • GB56.2 – Hydronephrosis with ureteral orifice obstruction
  • GB56.3 – Hydronephrosis due to bladder obstruction
  • GB56.4 – Other or unspecified hydronephrosis
  • GB56.5 – Hydronephrosis and reflux nephropathy with vesicoureteral or vesico-uretero-renal reflux
  • GB56.Y – Other specified obstructive or reflux nephropathy
  • GB56.Z – Obstructive or reflux nephropathy, unspecified

Sibling codes

  • GB50 – Acute tubulo-interstitial nephritis
  • GB51 – Acute pyelonephritis
  • GB52 – Acute tubular necrosis
  • GB53 – Acute renal papillary necrosis
  • GB54 – Tubulo-interstitial nephritis, not specified as acute or chronic
  • GB55 – Chronic tubulo-interstitial nephritis
  • GB57 – Nephrocalcinosis
  • GB58 – Pyonephrosis
  • GB59 – Renal or perinephric abscess
  • GB5Y – Other specified renal tubulo-interstitial diseases
  • GB5Z – Renal tubulo-interstitial diseases, unspecified

Foundation entity

Obstructive or reflux nephropathy – http://id.who.int/icd/entity/1656637330

Allowed postcoordination axes

Part of: 16: Diseases of the genitourinary system