ICD-10 Code for HydronephrosisNEC
Also indexed as (atrophic) (early) (functionless) (intermittent) (primary) (secondary)
The ICD-10-CM code for hydronephrosisnec is N13.30 — Unspecified hydronephrosis. This is the code the Alphabetic Index gives for hydronephrosisnec with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
N13.30 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which hydronephrosisnec code should you use?
The Alphabetic Index lists 9 codes under HydronephrosisNEC. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
HydronephrosisNEC with
| infection | N13.6 | Pyonephrosis | |
| ureteral stricture NEC | N13.1 | Hydronephrosis with ureteral stricture, not elsewhere classified | |
| obstruction › renal calculus | N13.2 | Hydronephrosis with renal and ureteral calculous obstruction | |
| obstruction › ureteral NEC | N13.1 | Hydronephrosis with ureteral stricture, not elsewhere classified | |
| obstruction › ureteropelvic junction | Q62.11 | Congenital occlusion of ureteropelvic junction | |
| ureteral stricture NEC › with infection | N13.6 | Pyonephrosis | |
| obstruction › renal calculus › with infection | N13.6 | Pyonephrosis | |
| obstruction › ureteral NEC › with infection | N13.6 | Pyonephrosis | |
| obstruction › ureteral NEC › calculus | N13.2 | Hydronephrosis with renal and ureteral calculous obstruction | |
| obstruction › ureteropelvic junction › acquired | N13.0 | Hydronephrosis with ureteropelvic junction obstruction | |
| obstruction › ureteral NEC › calculus › with infection | N13.6 | Pyonephrosis | |
| obstruction › ureteropelvic junction › acquired › with infection | N13.6 | Pyonephrosis |
HydronephrosisNEC congenital
| due to acquired occlusion of ureteropelvic junction | N13.0 | Hydronephrosis with ureteropelvic junction obstruction |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources