N21.0

Billable

Calculus in bladder

N21.0 is the ICD-10-CM code for Calculus in bladder. 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

Includes

  • Calculus in diverticulum of bladder
  • Urinary bladder stone

Excludes2 — not included here

  • staghorn calculus (N20.0)

Frequently asked questions

What is ICD-10 code N21.0?
N21.0 is the ICD-10-CM code for "Calculus in bladder". It falls under N00-N99 Diseases of the genitourinary system.
Is N21.0 a billable code?
Yes — N21.0 is a billable, specific ICD-10-CM code valid for reimbursement.

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

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