N20: Calculus of kidney and ureter
Codes under N20 (Calculus of kidney and ureter). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| N20.0 | Calculus of kidney | ✓ |
| N20.0 | Calculus of kidney | ✓ |
| N20.1 | Calculus of ureter | ✓ |
| N20.1 | Calculus of ureter | ✓ |
| N20.2 | Calculus of kidney with calculus of ureter | ✓ |
| N20.2 | Calculus of kidney with calculus of ureter | ✓ |
| N20.9 | Urinary calculus, unspecified | ✓ |
| N20.9 | Urinary calculus, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code N20?
N20 is an ICD-10-CM category covering Calculus of kidney and ureter. It contains 8 more specific diagnosis codes, 8 of which are billable.
Is N20 a billable code?
No — N20 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example N20.0 — Calculus of kidney). 8 of the 8 codes under N20 are billable.
What codes fall under N20?
N20 includes N20.0, N20.0, N20.1, N20.1, N20.2, plus 3 more. See the full list with descriptions and billable status above.
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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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