N27: Small kidney of unknown cause
Codes under N27 (Small kidney of unknown cause). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| N27.0 | Small kidney, unilateral | ✓ |
| N27.0 | Small kidney, unilateral | ✓ |
| N27.1 | Small kidney, bilateral | ✓ |
| N27.1 | Small kidney, bilateral | ✓ |
| N27.9 | Small kidney, unspecified | ✓ |
| N27.9 | Small kidney, unspecified | ✓ |
Frequently asked questions
What is ICD-10-CM code N27?
N27 is an ICD-10-CM category covering Small kidney of unknown cause. It contains 6 more specific diagnosis codes, 6 of which are billable.
Is N27 a billable code?
No — N27 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 N27.0 — Small kidney, unilateral). 6 of the 6 codes under N27 are billable.
What codes fall under N27?
N27 includes N27.0, N27.0, N27.1, N27.1, N27.9, plus 1 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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