ICD-10-CM Book 2024 Edition

Chapters  /  Chapter 14  /  N20-N23

Urolithiasis (N20-N23)

N20 Calculus of kidney and ureter
Calculous pyelonephritis
Excludes1 nephrocalcinosis (E83.59)
that with hydronephrosis (N13.2)
N20.0 Calculus of kidney
Nephrolithiasis NOS
Renal calculus
Renal stone
Staghorn calculus
Stone in kidney
N20.1 Calculus of ureter
Calculus of the ureteropelvic junction
Ureteric stone
N20.2 Calculus of kidney with calculus of ureter
N20.9 Urinary calculus, unspecified
N21 Calculus of lower urinary tract
Includes calculus of lower urinary tract with cystitis and urethritis
N21.0 Calculus in bladder
Calculus in diverticulum of bladder
Urinary bladder stone
Excludes2 staghorn calculus (N20.0)
N21.1 Calculus in urethra
Excludes2 calculus of prostate (N42.0)
N21.8 Other lower urinary tract calculus
N21.9 Calculus of lower urinary tract, unspecified
Excludes1 calculus of urinary tract NOS (N20.9)
N22 Calculus of urinary tract in diseases classified elsewhere
CodeFirst underlying disease, such as:
gout (M1A.-, M10.-)
schistosomiasis (B65.0-B65.9)
nonPrimary Yes
N23 Unspecified renal colic