Urolithiasis - N20-N23

These ranges represents Categories of Urolithiasis. The "N20-N23" signifies that these are the diseases within this broad section.

Codes:

N20 - Calculus of kidney and ureter
N21 - Calculus of lower urinary tract
N22 - Calculus of urinary tract in diseases classified elsewhere
N23 - Unspecified renal colic

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