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 721 Vesicoureteral-reflux with reflux nephropathy without hydroureter, unilateral
 * N13.722 Vesicoureteral-reflux with reflux nephropathy without hydroureter, bilateral
 * N13.729 Vesicoureteral-reflux with reflux nephropathy without hydroureter, unspecified
 * N13.73 Vesicoureteral-reflux with reflux nephropathy with hydroureter
 * N13.731 Vesicoureteral-reflux with reflux nephropathy with hydroureter, unilateral
 * N13.732 Vesicoureteral-reflux with reflux nephropathy with hydroureter, bilateral
 * N13.739 Vesicoureteral-reflux with reflux nephropathy with hydroureter, unspecified
 * N13.8 Other obstructive and reflux uropathy
 * Urinary tract obstruction due to specified cause
 * Code, if applicable, any causal condition first, such as:
 * enlarged prostate (N40.1)
 * N13.9 Obstructive and reflux uropathy, unspecified
 * Urinary tract obstruction NOS

N14 Drug- and heavy-metal-induced tubulo-interstitial and tubular conditions

 * Code first (T36-T65) to identify drug and toxic agent
 * N14.0 Analgesic nephropathy
 * N14.1 Nephropathy induced by other drugs, medicaments and biological substances
 * N14.2 Nephropathy induced by unspecified drug, medicament or biological substance
 * N14.3 Nephropathy induced by heavy metals
 * N14.4 Toxic nephropathy, not elsewhere classified

N15 Other renal tubulo-interstitial diseases

 * N15.0 Balkan nephropathy
 * Balkan endemic nephropathy
 * N15.1 Renal and perinephric abscess
 * N15.8 Other specified renal tubulo-interstitial diseases
 * N15.9 Renal tubulo-interstitial disease, unspecified
 * Infection of kidney NOS
 * Excludes1: urinary tract infection NOS (N39.0)

N16 Renal tubulo-interstitial disorders in diseases classified elsewhere

 * Includes: pyelonephritis
 * tubulo-interstitial nephritis
 * Code first underlying disease, such as:
 * brucellosis (