N20.1

N20.1: Calculus of ureter

Billable / specific codeICD-10-CM

N20.1 is a billable, specific ICD-10-CM code for calculus of ureter. It is valid for submission on a claim.

Check N20.1 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Calculus of the ureteropelvic junction
Ureteric stone

Excludes1 inherited from the categories above N20.1

A category’s note binds every code beneath it.

Written on N20: Calculus of kidney and ureter

nephrocalcinosis (E83.59)
that with hydronephrosis (N13.2)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

N20.1 is named in 6 Medicare coverage policies: 6 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A55336Billing and Coding: Retroperitoneal Ultrasound
A56421Billing and Coding: CT of the Abdomen and Pelvis
A57718Billing and Coding: Vitamin D Assay Testing
A57736Billing and Coding: Vitamin D Assay Testing

Alphabetic index entries that lead here

Calculus, calculi, calculous›ureter(impacted) (recurrent)
Calculus, calculi, calculous›ureteropelvic junction
Ureteritis›due to calculus

Code history

Unchanged in every release from FY2024 to FY2027.