ICD-10-CM category
N21: Calculus of lower urinary tract
Codes under N21 (Calculus of lower urinary tract). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| 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 | ✓ |
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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