N13.3
ICD-10Non-billable categoryOther and unspecified hydronephrosis
Official ICD-10-CM descriptor (FY2026)
Other and unspecified hydronephrosis
N13.3 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- hydronephrosis with infection (N13.6)
ICD-10-CM FY2026 defines 2 codes beneath N13.3. See the ICD-10-CM index for what this site publishes.
Related codes in N13
- N13.0Hydronephrosis with ureteropelvic junction obstruction
- N13.1Hydronephrosis w ureteral stricture, NEC
- N13.2Hydronephrosis with renal and ureteral calculous obstruction
- N13.4Hydroureter
- N13.5Crossing vessel and stricture of ureter w/o hydronephrosis
- N13.6Pyonephrosis
- N13.7Vesicoureteral-refluxcategory
- N13.8Other obstructive and reflux uropathy
- N13.9Obstructive and reflux uropathy, unspecified
Where this code sits
- Parent code
- N13
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.