N20

N20: Calculus of kidney and ureter

Non-billable headerICD-10-CM

N20 is a non-billable header ICD-10-CM code for calculus of kidney and ureter. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

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

Inclusion terms

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

Calculous pyelonephritis

Other codes that can never be billed with N20

Their own Excludes1 notes name this code, so the conflict is not listed above.

N11.1Chronic obstructive pyelonephritis
N12Tubulo-interstitial nephritis, not specified as acute or chronic
N21.9Calculus of lower urinary tract, unspecified
E79Disorders of purine and pyrimidine metabolism

Risk adjustment

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

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead N20

4 child codes. Green means billable.