Renal tubulo-interstitial diseases (N10-N16)
N10Acute pyelonephritis
› Acute infectious interstitial nephritis
› Acute pyelitis
› Acute tubulo-interstitial nephritis
› Hemoglobin nephrosis
› Myoglobin nephrosis
Use Additional Code: code (B95-B97), to identify infectious agent.
N11Chronic tubulo-interstitial nephritis
Includes: chronic infectious interstitial nephritis
› chronic pyelitis
› chronic pyelonephritis
Use Additional Code: code (B95-B97), to identify infectious agent.
N11.0Nonobstructive reflux-associated chronic pyelonephritis
› Pyelonephritis (chronic) associated with (vesicoureteral) reflux
Excludes 1: vesicoureteral reflux NOS (N13.70)
N11.1Chronic 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
Excludes 1: calculous pyelonephritis (N20.9)
› obstructive uropathy (N13.-)
N11.8Other chronic tubulo-interstitial nephritis
› Nonobstructive chronic pyelonephritis NOS
N11.9Chronic tubulo-interstitial nephritis, unspecified
› Chronic interstitial nephritis NOS
› Chronic pyelitis NOS
› Chronic pyelonephritis NOS
N12Tubulo-interstitial nephritis, not specified as acute or chronic
› Interstitial nephritis NOS
› Pyelitis NOS
› Pyelonephritis NOS
Excludes 1: calculous pyelonephritis (N20.9)
N13Obstructive and reflux uropathy
Excludes 2: 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 (Q62.11)
› obstructive pyelonephritis (N11.1)
N13.0Hydronephrosis with ureteropelvic junction obstruction
› Hydronephrosis due to acquired occlusion of ureteropelvic junction
Excludes 2: Hydronephrosis with ureteropelvic junction obstruction due to calculus (N13.2)
N13.1Hydronephrosis with ureteral stricture, not elsewhere classified
Excludes 1: Hydronephrosis with ureteral stricture with infection (N13.6)
N13.2Hydronephrosis with renal and ureteral calculous obstruction
Excludes 1: Hydronephrosis with renal and ureteral calculous obstruction with infection (N13.6)
N13.3Other and unspecified hydronephrosis
Excludes 1: hydronephrosis with infection (N13.6)
N13.30Unspecified hydronephrosis
N13.39Other hydronephrosis
N13.4Hydroureter
Excludes 1: congenital hydroureter (Q62.3-)
› hydroureter with infection (N13.6)
› vesicoureteral-reflux with hydroureter (N13.73-)
N13.5Crossing vessel and stricture of ureter without hydronephrosis
› Kinking and stricture of ureter without hydronephrosis
Excludes 1: Crossing vessel and stricture of ureter without hydronephrosis with infection (N13.6)
N13.6Pyonephrosis
› Conditions in N13.0-N13.5 with infection
› Obstructive uropathy with infection
Use Additional Code: code (B95-B97), to identify infectious agent.
N13.7Vesicoureteral-reflux
Excludes 1: reflux-associated pyelonephritis (N11.0)
N13.70Vesicoureteral-reflux, unspecified
› Vesicoureteral-reflux NOS
N13.71Vesicoureteral-reflux without reflux nephropathy
N13.72Vesicoureteral-reflux with reflux nephropathy without hydroureter
N13.721Vesicoureteral-reflux with reflux nephropathy without hydroureter, unilateral
N13.722Vesicoureteral-reflux with reflux nephropathy without hydroureter, bilateral
N13.729Vesicoureteral-reflux with reflux nephropathy without hydroureter, unspecified
N13.73Vesicoureteral-reflux with reflux nephropathy with hydroureter
N13.731Vesicoureteral-reflux with reflux nephropathy with hydroureter, unilateral
N13.732Vesicoureteral-reflux with reflux nephropathy with hydroureter, bilateral
N13.739Vesicoureteral-reflux with reflux nephropathy with hydroureter, unspecified
N13.8Other obstructive and reflux uropathy
› Urinary tract obstruction due to specified cause
Code First: , if applicable, any causal condition, such as:
› enlarged prostate (N40.1)
N13.9Obstructive and reflux uropathy, unspecified
› Urinary tract obstruction NOS
N14Drug- and heavy-metal-induced tubulo-interstitial and tubular conditions
Code First: poisoning due to drug or toxin, if applicable (T36-T65 with fifth or sixth character 1-4)
Use Additional Code: code for adverse effect, if applicable, to identify drug (T36-T50) with fifth or sixth character 5)
N14.0Analgesic nephropathy
N14.1Nephropathy induced by other drugs, medicaments and biological substances
N14.11Contrast-induced nephropathy
› Contrast medium, radiography nephropathy
Excludes 2: acute kidney failure (N17.-)
N14.19Nephropathy induced by other drugs, medicaments and biological substances
N14.2Nephropathy induced by unspecified drug, medicament or biological substance
N14.3Nephropathy induced by heavy metals
N14.4Toxic nephropathy, not elsewhere classified
N15Other renal tubulo-interstitial diseases
N15.0Balkan nephropathy
› Balkan endemic nephropathy
N15.1Renal and perinephric abscess
N15.8Other specified renal tubulo-interstitial diseases
N15.9Renal tubulo-interstitial disease, unspecified
› Infection of kidney NOS
Excludes 1: urinary tract infection NOS (N39.0)
N16Renal tubulo-interstitial disorders in diseases classified elsewhere
› Pyelonephritis
› Tubulo-interstitial nephritis
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)
Excludes 1: 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)