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N13 Obstructive and reflux uropathy

ICD-10-CM category N13 sits in Chapter 14 (Diseases of the genitourinary system, N00-N99). It contains 18 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Subcategories

N13.3 Other and unspecified hydronephrosisN13.7 Vesicoureteral-refluxN13.72 Vesicoureteral-reflux w reflux nephropathy w/o hydroureterN13.73 Vesicoureteral-reflux w reflux nephropathy with hydroureter

Billable codes in N13

CodeDescription
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

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