N13

N13: Obstructive and reflux uropathy

Non-billable headerICD-10-CM

N13 is a non-billable header ICD-10-CM code for obstructive and reflux uropathy. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2: not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

calculus of kidney and ureter without hydronephrosis (N20.-)
congenital obstructive defects of renal pelvis and ureter (Q62.0-Q62.3)
hydronephrosis with ureteropelvic junction obstruction (Q62.11)
obstructive pyelonephritis (N11.1)

Other codes that can never be billed with N13

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

M72.8Other fibroblastic disorders
N11.0Nonobstructive reflux-associated chronic pyelonephritis
N11.1Chronic obstructive pyelonephritis
N13.1Hydronephrosis with ureteral stricture, not elsewhere classified
N13.2Hydronephrosis with renal and ureteral calculous obstruction
N13.3Other and unspecified hydronephrosis
N13.4Hydroureter
N13.5Crossing vessel and stricture of ureter without hydronephrosis

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 N13

10 child codes. Green means billable.