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N13.1

✓ Billable

Hydronephrosis with ureteral stricture, not elsewhere classified

Diseases of the genitourinary system (N00-N99)

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❌ Excludes1

direct

Cannot be coded with N13.1

  • • Hydronephrosis with ureteral stricture with infection (N13.6)

⚠️ Excludes2

inherited from N13

Rules from parent category N13: Obstructive and reflux uropathy

  • • calculus of kidney and ureter without hydronephrosis (N20.-)
  • • congenital obstructive defects of renal pelvis and ureter (Q62.0-Q62.3)
  • • hydronephrosis with ureteropelvic junction obstruction (Q62.11)
  • • obstructive pyelonephritis (N11.1)

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Code Information

CodeN13.1
BillableYes
ParentN13
CategoryDiseases of the genitourinary system (N00-N99)
Excludes11 rule(s)
Excludes24 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)