Tubulo-interstitial nephritis, not spcf as acute or chronic

This code represents inflammation of the renal tubules and surrounding interstitial tissue when the physician has not specified whether the condition is acute or chronic. It indicates a general diagnosis of tubulo-interstitial nephritis without further temporal clarification.

Use this code when documentation clearly states "tubulo-interstitial nephritis" but lacks specific details regarding its acute or chronic nature. This is appropriate when the provider has not yet determined the chronicity or when the medical record simply doesn't provide that level of detail.

• Do not use if the documentation specifies "acute tubulo-interstitial nephritis" (N10) or "chronic tubulo-interstitial nephritis" (N11.-).
• Ensure documentation supports the diagnosis of tubulo-interstitial nephritis; avoid using this code for other kidney conditions.
• Remember the Excludes1 note: N20.9 (calculous pyelonephritis) should never be coded with this diagnosis.