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ICD-10 Guide
ICD-10 CodesN20.1

N20.1

Billable

Calculus of ureter

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

Code Description

ICD-10 N20.1 is a billable code used to indicate a diagnosis of calculus of ureter.

Key Diagnostic Point:

Calculus of the ureter, commonly referred to as ureteral stones, is a condition characterized by the formation of solid mineral deposits within the ureter, the tube that carries urine from the kidney to the bladder. These stones can vary in size and composition, often consisting of calcium oxalate, uric acid, or struvite. The presence of a calculus in the ureter can lead to significant clinical symptoms, including severe flank pain, hematuria (blood in urine), and urinary obstruction, which may result in hydronephrosis if left untreated. Diagnosis typically involves imaging studies such as ultrasound or CT scans, which can visualize the stones and assess any associated complications. Treatment options include conservative management, such as hydration and pain control, as well as more invasive procedures like lithotripsy, which uses shock waves to break up stones, or surgical stone removal in cases of larger stones or complications. Dietary modifications may also be recommended to prevent recurrence, focusing on hydration and dietary adjustments to reduce stone-forming substances. Understanding the clinical implications and management strategies for ureteral calculi is essential for effective patient care.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in stone composition and size
  • Differential diagnosis with other urinary tract conditions
  • Potential for multiple treatment modalities
  • Need for precise documentation of symptoms and imaging results

Audit Risk Factors

  • Inadequate documentation of stone size and location
  • Failure to document associated symptoms like hematuria
  • Incorrect coding of treatment procedures
  • Lack of follow-up documentation for recurrent stones

Specialty Focus

Medical Specialties

Urology

Documentation Requirements

Detailed imaging reports, treatment plans, and follow-up notes are essential for accurate coding.

Common Clinical Scenarios

Patients presenting with flank pain, hematuria, or urinary obstruction due to ureteral stones.

Billing Considerations

Urologists must document the size, location, and composition of stones, as well as any complications.

Emergency Medicine

Documentation Requirements

Emergency department notes should include initial assessment findings, imaging results, and treatment provided.

Common Clinical Scenarios

Patients presenting with acute renal colic or urinary retention due to ureteral obstruction.

Billing Considerations

Timely documentation is crucial for coding acute presentations and interventions.

Coding Guidelines

Inclusion Criteria

Use N20.1 When
  • According to official coding guidelines, N20
  • 1 should be used when a calculus is confirmed in the ureter
  • Coders must ensure that documentation supports the diagnosis and any associated procedures

Exclusion Criteria

Do NOT use N20.1 When
  • Exclusion criteria include conditions that do not involve calculi in the ureter

Related ICD-10 Codes

Related CPT Codes

50590CPT Code

Lithotripsy, extracorporeal shock wave

Clinical Scenario

Used for breaking up ureteral stones in outpatient settings.

Documentation Requirements

Pre-procedure imaging and post-procedure follow-up notes.

Specialty Considerations

Urologists must document the size and location of stones prior to the procedure.

52332CPT Code

Ureteroscopy with stone removal

Clinical Scenario

Performed for larger stones that cannot be treated with lithotripsy.

Documentation Requirements

Detailed operative notes and post-operative care documentation.

Specialty Considerations

Ensure that the indication for surgery is clearly documented.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of ureteral stones, improving the accuracy of data collection and reimbursement processes. This specificity aids in better tracking of treatment outcomes and resource utilization.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of ureteral stones, improving the accuracy of data collection and reimbursement processes. This specificity aids in better tracking of treatment outcomes and resource utilization.

Reimbursement & Billing Impact

reimbursement processes. This specificity aids in better tracking of treatment outcomes and resource utilization.

Resources

Clinical References

  • •
    American Urological Association Guidelines

Coding & Billing References

  • •
    American Urological Association Guidelines

Frequently Asked Questions

What are the common symptoms of ureteral calculi?

Common symptoms include severe flank pain, hematuria, and urinary urgency or frequency. Patients may also experience nausea and vomiting due to pain.

How are ureteral stones diagnosed?

Diagnosis typically involves imaging studies such as ultrasound or CT scans, which can visualize the stones and assess any complications.

What treatment options are available for ureteral stones?

Treatment options include conservative management with hydration and pain control, lithotripsy to break up stones, and surgical removal for larger stones or complications.