N10 Acute tubulo-interstitial nephritis
Includes: acute infectious interstitial nephritis acute pyelitis acute pyelonephritis acute tubular necrosis hemoglobin nephrosis myoglobin nephrosis Use additional code (B95-B97), to identify infectious agent.
N11 Chronic tubulo-interstitial nephritis
Includes: chronic infectious interstitial nephritis chronic pyelitis chronic pyelonephritis Use additional code (B95-B97), to identify infectious agent.
N11.0 Nonobstructive reflux-associated chronic pyelonephritis Pyelonephritis (chronic) associated with (vesicoureteral) reflux
Excludes1: vesicoureteral reflux NOS (N13.70)
N11.1 Chronic obstructive pyelonephritis
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.-)
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
N12 Tubulo-interstitial nephritis, not specified as acute or chronic Includes: interstitial nephritis NOS pyelitis NOS pyelonephritis NOS Excludes1: calculous pyelonephritis (N20.9)
N13 Obstructive and reflux uropathy
Excludes2: calculus of kidney and ureter without hydronephrosis (N20.-) congenital obstructive defects of renal pelvis and ureter (Q62.0-Q62.3) hydronephrosis with ureteropelvic junction obstruction (Q62.1) obstructive pyelonephritis (N11.1)
N13.1 Hydronephrosis with ureteral stricture, not elsewhere classified
Excludes1: Hydronephrosis with ureteral stricture with infection (N13.6)
N13.2 Hydronephrosis with renal and ureteral calculous obstruction Excludes1: Hydronephrosis with renal and ureteral calculous obstruction with infection (N13.6)
N13.3 Other and unspecified hydronephrosis
Excludes1: hydronephrosis with infection (N13.6)
N13.30 Unspecified hydronephrosis
N13.39 Other hydronephrosis
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