ICD-10-CM · Chapter 14 · N00-N99
N13 Obstructive and reflux uropathy
Excludes 2 (not included here)
- 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)
Subcodes
Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.
| Code | Description | Billable |
|---|---|---|
| N13..0 | Hydronephrosis with ureteropelvic junction obstruction | Yes |
| N13..1 | Hydronephrosis with ureteral stricture, not elsewhere classified | Yes |
| N13..2 | Hydronephrosis with renal and ureteral calculous obstruction | Yes |
| N13..3 | Other and unspecified hydronephrosis | No |
| N13..30 | Unspecified hydronephrosis | Yes |
| N13..39 | Other hydronephrosis | Yes |
| N13..4 | Hydroureter | Yes |
| N13..5 | Crossing vessel and stricture of ureter without hydronephrosis | Yes |
| N13..6 | Pyonephrosis | Yes |
| N13..7 | Vesicoureteral-reflux | No |
| N13..70 | Vesicoureteral-reflux, unspecified | Yes |
| N13..71 | Vesicoureteral-reflux without reflux nephropathy | Yes |
| N13..72 | Vesicoureteral-reflux with reflux nephropathy without hydroureter | No |
| N13..721 | Vesicoureteral-reflux with reflux nephropathy without hydroureter, unilateral | Yes |
| N13..722 | Vesicoureteral-reflux with reflux nephropathy without hydroureter, bilateral | Yes |
| N13..729 | Vesicoureteral-reflux with reflux nephropathy without hydroureter, unspecified | Yes |
| N13..73 | Vesicoureteral-reflux with reflux nephropathy with hydroureter | No |
| N13..731 | Vesicoureteral-reflux with reflux nephropathy with hydroureter, unilateral | Yes |
| N13..732 | Vesicoureteral-reflux with reflux nephropathy with hydroureter, bilateral | Yes |
| N13..739 | Vesicoureteral-reflux with reflux nephropathy with hydroureter, unspecified | Yes |
| N13..8 | Other obstructive and reflux uropathy | Yes |
| N13..9 | Obstructive and reflux uropathy, unspecified | Yes |
Last reviewed: September 2026