N13.4
N13.4: Hydroureter
Billable / specific codeICD-10-CM
N13.4 is a billable, specific ICD-10-CM code for hydroureter. It is valid for submission on a claim.
Check N13.4 with the rest of the claim: free scrubberExcludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
Excludes2 inherited from the categories above N13.4
Not part of this code, but both may be coded when both are present.
Other codes that can never be billed with N13.4
Their own Excludes1 notes name this code, so the conflict is not listed above.
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
N13.4 is named in 2 Medicare coverage policies: 2 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A55336Billing and Coding: Retroperitoneal Ultrasound
- A56421Billing and Coding: CT of the Abdomen and Pelvis
Alphabetic index entries that lead here
- Hydroureter
- Dilatation›ureter›due to obstruction
Code history
Unchanged in every release from FY2024 to FY2027.
Other codes under N13
- N13.0Hydronephrosis with ureteropelvic junction obstruction
- N13.1Hydronephrosis with ureteral stricture, not elsewhere classified
- N13.2Hydronephrosis with renal and ureteral calculous obstruction
- N13.3Other and unspecified hydronephrosis
- N13.5Crossing vessel and stricture of ureter without hydronephrosis
- N13.6Pyonephrosis
- N13.7Vesicoureteral-reflux
- N13.8Other obstructive and reflux uropathy
- N13.9Obstructive and reflux uropathy, unspecified