N11 - Chronic tubulo-interstitial nephritis
N11.1 - Chronic obstructive pyelonephritis
InclusionTerm:
-Pyelonephritis (chronic) associated with anomaly of pelviureteric junction
-Pyelonephritis (chronic) associated with anomaly of pyeloureteric junction
-Pyelonephritis (chronic) associated with crossing of vessel
-Pyelonephritis (chronic) associated with kinking of ureter
-Pyelonephritis (chronic) associated with obstruction of ureter
-Pyelonephritis (chronic) associated with stricture of pelviureteric junction
-Pyelonephritis (chronic) associated with stricture of ureter
Excludes 1:
-calculous pyelonephritis N20.9)
-obstructive uropathy (N13.-)