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N20-N23)=
N20 Calculus of kidney and ureter
- Calculous pyelonephritis
- Excludes1: nephrocalcinosis (E83.5)
- 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
- Ureteric stone
- N20.2 Calculus of kidney with calculus of ureter
- N20.9 Urinary calculus, unspecified
N21 Calculus of lower urinary tract
- Includes: that 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
- Code first underlying disease, such as:
- gout ( M1a-, M10.-)
- schistosomiasis (B65.0-B65.9)
N23 Unspecified renal colic
Other disorders of kidney and ureter (N25-N29)
- Excludes2: disorders of kidney and ureter with urolithiasis (N20-N23)
N25 Disorders resulting from impaired renal tubular function
- Excludes1: metabolic disorders classifiable to E70-E90
- N25.0 Renal osteodystrophy
- Azotemic osteodystrophy
- Phosphate-losing tubular disorders
- Renal rickets
- Renal
