Obstructive or reflux nephropathy

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2025-01

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.

exclusions

• Calculus of kidney and ureter without hydronephrosis  (GB70-GB7Z)
• Obstructive pyelonephritis  (GB55)

sections/codes in this section (GB56-GB56)

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

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