N21Non-billable (header)

Calculus of lower urinary tract

Related Codes· Urolithiasis (N20-N23)

N20Calculus of kidney and ureterN22Calculus of urinary tract in diseases classified elsewhereN23Unspecified renal colic

Sub-codes of N21(4)

N21 is a non-billable header. Select a sub-code to bill.

N21.0Calculus in bladder✓ BillableN21.1Calculus in urethra✓ BillableN21.8Other lower urinary tract calculus✓ BillableN21.9Calculus of lower urinary tract, unspecified✓ Billable

✓ 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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