ICD-10-CM 2027
ICD-10 code for obstructive nephropathy
From the official ICD-10-CM alphabetic index entry “Nephropathy › obstructive”. Page updated September 29, 2026.
About coding obstructive nephropathy
The ICD-10-CM code for obstructive nephropathy is N13.8 (Other obstructive and reflux uropathy).
Within N13, choose N13.8 (Other obstructive and reflux uropathy) only when documentation doesn't support a more specific option: hydronephrosis with ureteropelvic junction obstruction (N13.0), hydronephrosis with ureteral stricture, not elsewhere classified (N13.1), hydronephrosis with renal and ureteral calculous obstruction (N13.2), other and unspecified hydronephrosis (N13.3), hydroureter (N13.4), Crossing vessel and stricture of ureter without hydronephrosis (N13.5), Pyonephrosis (N13.6), Vesicoureteral-reflux (N13.7) and 1 more.
Code first , if applicable, any causal condition, such as: enlarged prostate (N40.1).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
Common questions about obstructive nephropathy ICD-10 codes
What is the ICD-10 code for obstructive nephropathy?
- N13.8 — Other obstructive and reflux uropathy.
Is N13.8 billable?
- Yes. N13.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N13.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N13.8 as a principal diagnosis.
Is N13.8 a CC or MCC?
- N13.8 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.