N16 Renal tubulo-interstitial disorders in diseases classified elsewhere

Pyelonephritis
Tubulo-interstitial nephritis

Excludes1: diphtheritic pyelonephritis and tubulo-interstitial nephritis (A36.84)
pyelonephritis and tubulo-interstitial nephritis in candidiasis (B37.49)
pyelonephritis and tubulo-interstitial nephritis in cystinosis (E72.04)
pyelonephritis and tubulo-interstitial nephritis in salmonella infection (A02.25)
pyelonephritis and tubulo-interstitial nephritis in sarcoidosis (D86.84)
pyelonephritis and tubulo-interstitial nephritis in Sjogren syndrome (M35.04)
pyelonephritis and tubulo-interstitial nephritis in systemic lupus erythematosus (M32.15)
pyelonephritis and tubulo-interstitial nephritis in toxoplasmosis (B58.83)
renal tubular degeneration in diabetes (E08-E13 with .29)
syphilitic pyelonephritis and tubulo-interstitial nephritis (A52.75)

Code first: underlying disease, such as:
brucellosis (A23.0-A23.9)
cryoglobulinemia (D89.1)
glycogen storage disease (E74.0-)
leukemia (C91-C95)
lymphoma (C81.0-C85.9, C96.0-C96.9)
multiple myeloma (C90.0-)
sepsis (A40.0-A41.9)
Wilson's disease (E83.01)