Other chronic tubulo-interstitial nephritis

This code signifies a persistent, long-term inflammation affecting the renal tubules and surrounding interstitial tissue, excluding conditions specifically classified elsewhere. It indicates a chronic kidney disease process that impacts the kidney's filtering and reabsorption functions.

Use this code for documented cases of chronic tubulo-interstitial nephritis when a more specific etiology (e.g., reflux nephropathy, drug-induced) is not identified or does not have a unique ICD-10-CM code. Documentation should clearly state "chronic tubulo-interstitial nephritis" and rule out other specific forms.

• Do not use this code if a more specific chronic tubulo-interstitial nephritis code (e.g., N11.0, N11.1, N11.2) is applicable.
• Always sequence this code after the underlying cause if known and documented (e.g., drug-induced, systemic disease).
• Ensure the documentation explicitly states "chronic" to differentiate from acute forms (N10).