N21.9

Billable

Calculus of lower urinary tract, unspecified

N21.9 is the ICD-10-CM code for Calculus of lower urinary tract, unspecified. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
N00-N99
Parent
N21
Edition
FY2026

N00-N99 Diseases of the genitourinary system

Excludes1 — not coded here

  • calculus of urinary tract NOS (N20.9)

Frequently asked questions

What is ICD-10 code N21.9?
N21.9 is the ICD-10-CM code for "Calculus of lower urinary tract, unspecified". It falls under N00-N99 Diseases of the genitourinary system.
Is N21.9 a billable code?
Yes — N21.9 is a billable, specific ICD-10-CM code valid for reimbursement.
What is excluded from N21.9?
Excludes1 (not coded here): calculus of urinary tract NOS (N20.9).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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