ICD-10-CM category
N13 Obstructive and reflux uropathy
N13 is a category, not a billable code. Report one of the 18 complete codes below.
Codes in N13
- N13.0Hydronephrosis with ureteropelvic junction obstruction
- N13.1Hydronephrosis with ureteral stricture, not elsewhere classified
- N13.2Hydronephrosis with renal and ureteral calculous obstruction
- N13.30Unspecified hydronephrosis
- N13.39Other hydronephrosis
- N13.4Hydroureter
- N13.5Crossing vessel and stricture of ureter without hydronephrosis
- N13.6Pyonephrosis
- N13.70Vesicoureteral-reflux, unspecified
- N13.71Vesicoureteral-reflux without reflux nephropathy
- N13.721Vesicoureteral-reflux with reflux nephropathy without hydroureter, unilateral
- N13.722Vesicoureteral-reflux with reflux nephropathy without hydroureter, bilateral
- N13.729Vesicoureteral-reflux with reflux nephropathy without hydroureter, unspecified
- N13.731Vesicoureteral-reflux with reflux nephropathy with hydroureter, unilateral
- N13.732Vesicoureteral-reflux with reflux nephropathy with hydroureter, bilateral
- N13.739Vesicoureteral-reflux with reflux nephropathy with hydroureter, unspecified
- N13.8Other obstructive and reflux uropathy
- N13.9Obstructive and reflux uropathy, unspecified
Outside the US? N13 in the international WHO ICD-10 lists its inclusion and exclusion notes.
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ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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