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ICD-10 Guide
ICD-10 CodesN04.6

N04.6

Billable

Nephrotic syndrome with dense deposit disease

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

Code Description

ICD-10 N04.6 is a billable code used to indicate a diagnosis of nephrotic syndrome with dense deposit disease.

Key Diagnostic Point:

Nephrotic syndrome with dense deposit disease is a rare form of nephrotic syndrome characterized by the presence of dense deposits in the glomerular basement membrane. This condition is often associated with complement dysregulation, leading to glomerulonephritis and significant proteinuria. Patients typically present with symptoms such as edema, foamy urine due to proteinuria, and possible hematuria. Renal biopsy findings often reveal a characteristic pattern of dense deposits on electron microscopy, which distinguishes it from other forms of nephrotic syndrome. The pathophysiology involves the activation of the alternative complement pathway, resulting in inflammation and damage to the glomeruli. Management of nephrotic syndrome with dense deposit disease may include corticosteroids, immunosuppressive agents, and supportive care to control symptoms and prevent complications such as thromboembolism and infections. Regular monitoring of renal function and proteinuria is essential for assessing disease progression and treatment efficacy.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Requires understanding of nephrology terminology and disease mechanisms.
  • Differentiation from other types of nephrotic syndrome and glomerulonephritis.
  • Need for accurate documentation of renal biopsy findings.
  • Management may involve multiple specialties, complicating coding.

Audit Risk Factors

  • Inadequate documentation of renal biopsy results.
  • Failure to specify the type of nephrotic syndrome.
  • Misclassification of related conditions.
  • Lack of clear treatment plans in medical records.

Specialty Focus

Medical Specialties

Nephrology

Documentation Requirements

Detailed clinical notes on symptoms, lab results, and treatment plans.

Common Clinical Scenarios

Diagnosis and management of nephrotic syndrome, renal biopsies, and follow-up care.

Billing Considerations

Ensure clear documentation of proteinuria levels and renal function tests.

Pathology

Documentation Requirements

Comprehensive reports on renal biopsy findings, including histological and electron microscopy results.

Common Clinical Scenarios

Evaluation of renal biopsies for nephrotic syndrome and glomerulonephritis.

Billing Considerations

Accurate description of dense deposits and their implications for diagnosis.

Coding Guidelines

Inclusion Criteria

Use N04.6 When
  • Follow official ICD
  • 10 coding guidelines, ensuring accurate documentation of the diagnosis, treatment, and any related conditions
  • Include specific details from renal biopsy reports and laboratory findings to support the diagnosis

Exclusion Criteria

Do NOT use N04.6 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

88172CPT Code

Renal biopsy, percutaneous, needle

Clinical Scenario

Used when a renal biopsy is performed to confirm diagnosis.

Documentation Requirements

Document indication for biopsy, findings, and any complications.

Specialty Considerations

Nephrology specialists should ensure thorough documentation of the biopsy process.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of nephrotic syndrome, including dense deposit disease, which enhances the accuracy of patient records and treatment plans.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of nephrotic syndrome, including dense deposit disease, which enhances the accuracy of patient records and treatment plans.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of nephrotic syndrome, including dense deposit disease, which enhances the accuracy of patient records and treatment plans.

Resources

Clinical References

  • •
    Kidney Disease: Improving Global Outcomes (KDIGO)

Coding & Billing References

  • •
    Kidney Disease: Improving Global Outcomes (KDIGO)

Frequently Asked Questions

What are the common symptoms of nephrotic syndrome with dense deposit disease?

Common symptoms include significant edema, foamy urine due to proteinuria, and possible hematuria. Patients may also experience fatigue and weight gain due to fluid retention.