| N13 | Obstructive and reflux uropathy |
| | Hydronephrosis with ureteropelvic junction obstruction |
| | Hydronephrosis with ureteral stricture, not elsewhere classified |
| | Hydronephrosis with renal and ureteral calculous obstruction |
| | Other and unspecified hydronephrosis |
| | Unspecified hydronephrosis |
| | Other hydronephrosis |
| | Hydroureter |
| | Crossing vessel and stricture of ureter without hydronephrosis |
| | Pyonephrosis |
| | Vesicoureteral-reflux |
| | Vesicoureteral-reflux, unspecified |
| | Vesicoureteral-reflux, without reflux nephropathy |
| | Vesicoureteral-reflux with reflux nephropathy without hydroureter |
| | Vesicoureteral-reflux with reflux nephropathy without hydroureter, unilateral |
| | Vesicoureteral-reflux with reflux nephropathy without hydroureter, bilateral |
| | Vesicoureteral-reflux with reflux nephropathy without hydroureter, unspecified |
| | Vesicoureteral-reflux with reflux nephropathy with hydroureter |
| | Vesicoureteral-reflux with reflux nephropathy with hydroureter, unilateral |
| | Vesicoureteral-reflux with reflux nephropathy with hydroureter, bilateral |
| | Vesicoureteral-reflux with reflux nephropathy with hydroureter, unspecified |
| | Other obstructive and reflux uropathy |
| | Obstructive and reflux uropathy, unspecified |
