N11.9: Chronic tubulo-interstitial nephritis, unspecified
N11.9 is the billable ICD-10-CM diagnosis code for Chronic tubulo-interstitial nephritis, unspecified. It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code N11.9?
N11.9 is the ICD-10-CM diagnosis code for Chronic tubulo-interstitial nephritis, unspecified. It belongs to category N11 (Chronic tubulo-interstitial nephritis).
Is N11.9 a billable code?
Yes. N11.9 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does N11.9 belong to?
N11.9 is part of ICD-10-CM category N11 — Chronic tubulo-interstitial nephritis, which has 8 billable codes.
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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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