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N11

Chronic tubulo-interstitial nephritis

• chronic infectious interstitial nephritis
• chronic pyelitis
• chronic pyelonephritis

N11.0

Nonobstructive reflux-associated chronic pyelonephritis

• vesicoureteral reflux NOS (N13.70)

• Pyelonephritis (chronic) associated with (vesicoureteral) reflux

N11.1

Chronic obstructive pyelonephritis

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

• 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

N11.8

Other chronic tubulo-interstitial nephritis

• Nonobstructive chronic pyelonephritis NOS

N11.9

Chronic tubulo-interstitial nephritis, unspecified

• Chronic interstitial nephritis NOS
• Chronic pyelitis NOS
• Chronic pyelonephritis NOS