Is N21.8 a billable ICD-10 code?

Yes. N21.8 (Other lower urinary tract calculus) is billable and can be used for insurance claims. Always verify payer-specific requirements.

N21.8 ✓ Billable

Other lower urinary tract calculus

Q: What is ICD-10 code N21.8?

ICD-10-CM code N21.8 stands for "Other lower urinary tract calculus". It is a billable code in the Diseases of the Genitourinary System chapter, effective FY2026 (Oct 1, 2025 – Sep 30, 2026).

ICD-10-CM · FY2026 · Diseases of the Genitourinary System

Code

N21.8

System

ICD-10-CM

Billable

Yes — valid for submission

Effective

FY2026

Chapter

Diseases of the Genitourinary System

Source

CMS / CDC NCHS

⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Frequently asked questions

What is ICD-10 code N21.8?

ICD-10-CM code N21.8 represents Other lower urinary tract calculus. It is a billable diagnosis code in the Diseases of the Genitourinary System chapter, effective October 1, 2025 – September 30, 2026.

Is N21.8 billable?

Yes. N21.8 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.

What chapter is N21.8 in?

N21.8 belongs to the Diseases of the Genitourinary System chapter (N00–N99) of ICD-10-CM.

Related codes in the N21 category

N21 Calculus of lower urinary tract Non-billable N21.0 Calculus in bladder Billable N21.1 Calculus in urethra Billable N21.9 Calculus of lower urinary tract, unspecified Billable

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