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ICD-10 Guide
ICD-10 CodesN01.6

N01.6

Billable

Rapidly progressive nephritic syndrome with dense deposit disease

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

Code Description

ICD-10 N01.6 is a billable code used to indicate a diagnosis of rapidly progressive nephritic syndrome with dense deposit disease.

Key Diagnostic Point:

Rapidly progressive nephritic syndrome (RPNS) with dense deposit disease is characterized by a rapid decline in renal function, often leading to end-stage renal disease within weeks to months. This condition is associated with the presence of dense deposits in the glomerular basement membrane, which is indicative of a specific type of glomerulonephritis. Clinically, patients may present with symptoms of nephritis, including hematuria, proteinuria, and hypertension. Laboratory findings typically reveal significant proteinuria and elevated serum creatinine levels. A renal biopsy is crucial for diagnosis, showing characteristic dense deposits on electron microscopy, along with mesangial proliferation and possible crescent formation. Management often involves immunosuppressive therapy, including corticosteroids and other agents, to mitigate the inflammatory process and preserve renal function. Early recognition and treatment are essential to improve outcomes in affected patients.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Requires understanding of nephrology terminology and conditions.
  • Involves differentiating between various types of nephritic syndromes.
  • Documentation must support the diagnosis of dense deposit disease specifically.
  • Management protocols may vary significantly based on patient presentation.

Audit Risk Factors

  • Inadequate documentation of renal biopsy results.
  • Failure to specify the type of nephritic syndrome.
  • Misclassification of nephrotic syndrome versus nephritic syndrome.
  • Lack of evidence for rapid progression in clinical notes.

Specialty Focus

Medical Specialties

Nephrology

Documentation Requirements

Detailed clinical notes including symptoms, lab results, and biopsy findings.

Common Clinical Scenarios

Patients presenting with acute renal failure and nephritic symptoms.

Billing Considerations

Ensure that all relevant laboratory and imaging studies are documented to support the diagnosis.

Pathology

Documentation Requirements

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

Common Clinical Scenarios

Biopsy evaluations for patients suspected of having glomerulonephritis.

Billing Considerations

Pathology reports must clearly indicate the presence of dense deposits and any associated findings.

Coding Guidelines

Inclusion Criteria

Use N01.6 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the diagnosis is supported by clinical documentation
  • Include any relevant lab results and biopsy findings in the medical record

Exclusion Criteria

Do NOT use N01.6 When
  • Exclude codes that do not specify dense deposit disease

Related ICD-10 Codes

Related CPT Codes

88172CPT Code

Renal biopsy, percutaneous, needle

Clinical Scenario

Used when a renal biopsy is performed to confirm the diagnosis of N01.6.

Documentation Requirements

Document the indication for biopsy and findings.

Specialty Considerations

Nephrologists must ensure that the biopsy results are clearly linked to the diagnosis.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of nephritic syndromes, improving the accuracy of diagnoses and treatment tracking. N01.6 provides a distinct code for a complex condition that was less clearly defined in ICD-9.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of nephritic syndromes, improving the accuracy of diagnoses and treatment tracking. N01.6 provides a distinct code for a complex condition that was less clearly defined in ICD-9.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of nephritic syndromes, improving the accuracy of diagnoses and treatment tracking. N01.6 provides a distinct code for a complex condition that was less clearly defined in ICD-9.

Resources

Clinical References

  • •
    Kidney Disease: Improving Global Outcomes (KDIGO)

Coding & Billing References

  • •
    Kidney Disease: Improving Global Outcomes (KDIGO)

Frequently Asked Questions

What are the key symptoms of rapidly progressive nephritic syndrome?

Key symptoms include hematuria, proteinuria, hypertension, and rapid decline in renal function, often requiring immediate medical intervention.