N21Non-billable (header)
Calculus of lower urinary tract
✓ Includes
- •calculus of lower urinary tract with cystitis and urethritis
Code Hierarchy
┌14Diseases of the genitourinary system (N00-N99)├N20-N23Urolithiasis (N20-N23)├N21Calculus of lower urinary tract
└N21Calculus of lower urinary tract
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