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

excludes1
calculous pyelonephritis (N20.9)
obstructive uropathy (N13.-)

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