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v1.0.0
ICD-10 Guide
ICD-10 CodesN13.4

N13.4

Billable

Hydroureter

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/18/2025

Code Description

ICD-10 N13.4 is a billable code used to indicate a diagnosis of hydroureter.

Key Diagnostic Point:

Hydroureter refers to the dilation of the ureter due to the accumulation of urine, often resulting from an obstruction in the urinary tract. This condition can lead to significant complications, including hydronephrosis, which is the swelling of a kidney due to a build-up of urine. Hydroureter can be caused by various factors, including urinary tract infections (UTIs), kidney stones, tumors, or strictures. In cases of pyelonephritis, the infection can ascend from the bladder to the kidneys, causing inflammation and potentially leading to hydroureter. Interstitial nephritis, often drug-induced, can also contribute to urinary obstruction. Management typically involves addressing the underlying cause, which may include antibiotic therapy for infections, ureteral stenting, or surgical intervention to relieve the obstruction. Accurate diagnosis and timely treatment are crucial to prevent renal damage and preserve kidney function.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between hydroureter and hydronephrosis
  • Identifying underlying causes such as infections or obstructions
  • Documenting associated conditions like pyelonephritis or interstitial nephritis
  • Understanding the implications of drug-induced nephropathy

Audit Risk Factors

  • Inadequate documentation of the cause of obstruction
  • Failure to document associated conditions like UTIs or nephritis
  • Misclassification of hydroureter as hydronephrosis
  • Lack of clarity in treatment plans or management strategies

Specialty Focus

Medical Specialties

Urology

Documentation Requirements

Detailed history of urinary symptoms, imaging results, and treatment plans.

Common Clinical Scenarios

Patients presenting with flank pain, hematuria, or recurrent UTIs.

Billing Considerations

Ensure clear documentation of any surgical interventions or stenting procedures.

Nephrology

Documentation Requirements

Comprehensive renal function tests, history of kidney disease, and medication review.

Common Clinical Scenarios

Patients with chronic kidney disease presenting with acute changes in renal function.

Billing Considerations

Document any drug-induced nephropathy and its management thoroughly.

Coding Guidelines

Inclusion Criteria

Use N13.4 When
  • Follow official ICD
  • 10 coding guidelines, ensuring accurate documentation of the cause of hydroureter
  • Include any relevant clinical findings and treatment plans

Exclusion Criteria

Do NOT use N13.4 When
  • Exclude conditions that do not directly relate to urinary obstruction

Related ICD-10 Codes

Related CPT Codes

52332CPT Code

Ureteral stent placement

Clinical Scenario

Used in cases of obstructive hydroureter to relieve pressure.

Documentation Requirements

Document indication for stenting and any imaging studies performed.

Specialty Considerations

Urologists should ensure clear documentation of the procedure and follow-up care.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of conditions like hydroureter, improving the accuracy of diagnoses and treatment tracking.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like hydroureter, improving the accuracy of diagnoses and treatment tracking.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of conditions like hydroureter, improving the accuracy of diagnoses and treatment tracking.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

What are the common causes of hydroureter?

Common causes include urinary tract obstructions from stones, tumors, strictures, and infections.

How is hydroureter diagnosed?

Diagnosis typically involves imaging studies such as ultrasound or CT scans to visualize the urinary tract.

What treatments are available for hydroureter?

Treatment may include ureteral stenting, surgical intervention, and management of underlying infections.