Chapter XIV
Diseases of the genitourinary system
(N00-N99)

Urolithiasis
(N20-N23)

N20 Calculus of kidney and ureter

Incl.:
calculous pyelonephritis
Excl.:
with hydronephrosis ( N13.2)
N20.0 Calculus of kidney
Incl.:
Nephrolithiasis NOS
Renal calculus or stone
Staghorn calculus
Stone in kidney
N20.1 Calculus of ureter
Incl.:
Ureteric stone
N20.2 Calculus of kidney with calculus of ureter
N20.9 Urinary calculus, unspecified

N21 Calculus of lower urinary tract

Incl.:
with cystitis and urethritis
N21.0 Calculus in bladder
Incl.:
Calculus in diverticulum of bladder
Urinary bladder stone
Excl.:
staghorn calculus ( N20.0)
N21.1 Calculus in urethra
N21.8 Other lower urinary tract calculus
N21.9 Calculus of lower urinary tract, unspecified

N22* Calculus of urinary tract in diseases classified elsewhere

N22.0* Urinary calculus in schistosomiasis [bilharziasis] (B65.-†)
N22.8* Calculus of urinary tract in other diseases classified elsewhere

N23 Unspecified renal colic