N13
ICD-10Non-billable categoryObstructive and reflux uropathy
Official ICD-10-CM descriptor (FY2026)
Obstructive and reflux uropathy
N13 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- 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)
More specific codes under N13
- N13.0Hydronephrosis with ureteropelvic junction obstruction
- N13.1Hydronephrosis w ureteral stricture, NEC
- N13.2Hydronephrosis with renal and ureteral calculous obstruction
- N13.3Other and unspecified hydronephrosiscategory
- N13.4Hydroureter
- N13.5Crossing vessel and stricture of ureter w/o hydronephrosis
- N13.6Pyonephrosis
- N13.7Vesicoureteral-refluxcategory
- N13.8Other obstructive and reflux uropathy
- N13.9Obstructive and reflux uropathy, unspecified
Where this code sits
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.