Renal tubulo-interstitial disord in diseases classd elswhr

This code represents kidney disorders affecting the renal tubules and interstitial tissue that are secondary manifestations of another underlying disease process. It indicates that the tubulo-interstitial damage is not the primary condition but rather a complication or feature of a systemic illness.

Use this code when documentation clearly links tubulo-interstitial nephritis or other renal tubulo-interstitial pathology to an underlying systemic disease not specifically listed in the Excludes1 notes. This code requires dual coding, with the underlying systemic condition coded first.

• Always sequence the underlying systemic disease code first, followed by this code.
• Carefully review the Excludes1 list to ensure the specific underlying disease is not already represented by a more precise combination code.
• Documentation must explicitly state the connection between the renal tubulo-interstitial disorder and the primary systemic disease.