N13.4
BillableHydroureter
Hydroureter
Coding Notes
Includes
Conditions included under this code
- pyelonephritis
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •calculus of kidney and ureter without hydronephrosisN20
- •congenital obstructive defects of renal pelvis and ureterQ62.0-Q62.3
- •hydronephrosis with ureteropelvic junction obstructionQ62.11
- •obstructive pyelonephritisN11.1
Related Codes(9)
N13.0Hydronephrosis with ureteropelvic junction obstruction
N13.1Hydronephrosis w ureteral stricture, NEC
N13.2Hydronephrosis with renal and ureteral calculous obstruction
N13.3Other and unspecified hydronephrosis
N13.5Crossing vessel and stricture of ureter w/o hydronephrosis
N13.6Pyonephrosis
N13.7Vesicoureteral-reflux
N13.8Other obstructive and reflux uropathy
N13.9Obstructive and reflux uropathy, unspecified
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(44)
SNOMED CT
UMLS
- Dilatation of ureterC0521620
- Dilatation of ureter (disorder)C0521620
- Dilatation ureteralC0521620
- Dilated ureterC0521620
- Dilated uretersC0521620
- HydroureterC0521620
- Hydroureter (disorder)C0521620
- HydrouretersC0521620
- MegaloureterC0521620
- MegaureterC0521620
- Swelling of ureterC0521620
- Ureteral dilatationC0521620
- Ureteric dilatationC0521620
- Wide ureterC0521620
- dilatation ureterC0521620
- dilatation uretersC0521620
- hydroureterC0521620
- hydrouretersC0521620
- megaloureterC0521620
- megaureterC0521620
- megauretersC0521620
Clinical Terms
- Non-obstructive hydroureter
- hydroureters
- megaureters
- Megaloureter
- Wide ureter
- Dilatation of ureter (disorder)
- dilatation ureter
- Hydroureter (disorder)
- Dilatation ureteral
- Hydroureter due to necrotic papilla in ureter
- Megaureter
- Swelling of ureter
- Dilated ureter
- Dilatation of ureter
- Dilated ureters
- Ureteric dilatation
- Ureteral dilatation
- Obstructive hydroureter
- dilatation ureters
Frequently Asked Questions
What is the ICD-10 code for hydroureter?
The ICD-10-CM code for hydroureter is N13.4. The full clinical description is "Hydroureter". N13.4 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code N13.4 mean?
ICD-10-CM code N13.4 represents “Hydroureter”. It is classified under Chapter 14: Diseases of the Genitourinary System and is a billable/specific code that can be used on a claim.
Is N13.4 a billable code?
Yes, N13.4 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is N13.4 in?
N13.4 is in Chapter 14: Diseases of the Genitourinary System (codes N00-N99).
What codes cannot be used with N13.4?
N13.4 has Excludes1 notes indicating codes that cannot be used together with it, including: pyeloureteritis cystica (N28.85); congenital hydroureter (Q62.3-); hydroureter with infection (N13.6); and 1 more.
What SNOMED CT codes does N13.4 map to?
N13.4 maps to 4 SNOMED CT concepts: 69758005, 236601006, 236595003, 236594004. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for N13.4?
N13.4 is linked to 1 UMLS Concept Unique Identifier: C0521620. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does N13.4 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like hydroureter affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of N13.4?
N13.4 maps to the ICD-11 code: GB90.1 (Hydroureter).
Automate ICD-10 Coding With AI
Send clinical text to the AutoICD API and get back structured ICD-10 codes with confidence scores. Integrates into any EHR or billing system in minutes.
Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.