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N13.0

Billable

Hydronephrosis with ureteropelvic junction obstruction

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

Swelling of the kidney due to urine backup caused by a blockage where the kidney connects to the ureter, typically requiring intervention.

Coding Tips

  • •Document whether the obstruction is unilateral or bilateral, as this may affect severity and treatment
  • •Specify if the condition is congenital or acquired to support medical necessity for procedures

Excludes 2 — Not included here, may code separately

  • Hydronephrosis with ureteropelvic junction obstruction due to calculus (N13.2)

Code Hierarchy

└N13Obstructive and reflux uropathy└N13.0Hydronephrosis with ureteropelvic junction obstruction
└N13.0Hydronephrosis with ureteropelvic junction obstruction

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