| N20 | Calculus of kidney and ureter |
| N20.0 | Calculus of kidney |
| N20.1 | Calculus of ureter |
| N20.2 | Calculus of kidney with calculus of ureter |
| N20.9 | Urinary calculus, unspecified |
| N21 | Calculus of lower urinary tract |
| N21.0 | Calculus in bladder |
| N21.1 | Calculus in urethra |
| N21.8 | Other lower urinary tract calculus |
| N21.9 | Calculus of lower urinary tract, unspecified |
| N22 | Calculus of urinary tract in diseases classified elsewhere |
| N23 | Unspecified renal colic |