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ICD-10 Guide
ICD-10 CodesN05.7

N05.7

Billable

Unspecified nephritic syndrome with diffuse crescentic glomerulonephritis

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

Code Description

ICD-10 N05.7 is a billable code used to indicate a diagnosis of unspecified nephritic syndrome with diffuse crescentic glomerulonephritis.

Key Diagnostic Point:

Unspecified nephritic syndrome with diffuse crescentic glomerulonephritis is characterized by the presence of nephritic syndrome symptoms, including hematuria, proteinuria, and hypertension, alongside the histological finding of crescentic glomerulonephritis. This condition indicates a severe form of glomerular injury where crescent formations occur in the glomeruli, often leading to rapid progression to renal failure. Patients typically present with symptoms such as edema, oliguria, and elevated serum creatinine levels. The diagnosis is confirmed through renal biopsy, which reveals the presence of crescents in more than 50% of glomeruli. The etiology can be idiopathic or secondary to systemic diseases such as vasculitis or infections. Management often involves immunosuppressive therapy, including corticosteroids and cytotoxic agents, to reduce inflammation and prevent further renal damage. Close monitoring of renal function and regular follow-ups are essential to assess treatment efficacy and adjust management as needed.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Requires detailed clinical documentation to support diagnosis.
  • Differentiation from other types of glomerulonephritis is necessary.
  • Potential for overlapping symptoms with nephrotic syndrome complicates coding.
  • Need for accurate renal biopsy findings to substantiate the diagnosis.

Audit Risk Factors

  • Inadequate documentation of renal biopsy results.
  • Failure to specify the underlying cause of crescentic glomerulonephritis.
  • Misclassification of nephritic versus nephrotic syndrome.
  • Lack of follow-up documentation on renal function.

Specialty Focus

Medical Specialties

Nephrology

Documentation Requirements

Detailed clinical notes on symptoms, lab results, and renal biopsy findings.

Common Clinical Scenarios

Patients presenting with acute kidney injury and nephritic syndrome 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 the percentage of glomeruli affected.

Common Clinical Scenarios

Evaluation of renal biopsies in patients with suspected glomerulonephritis.

Billing Considerations

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

Coding Guidelines

Inclusion Criteria

Use N05.7 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the diagnosis is supported by clinical documentation and that the code is used only when the specific type of nephritic syndrome is confirmed

Exclusion Criteria

Do NOT use N05.7 When
  • Exclude conditions that do not meet the criteria for crescentic glomerulonephritis

Related ICD-10 Codes

Related CPT Codes

88172CPT Code

Renal biopsy, percutaneous, needle

Clinical Scenario

Used when a renal biopsy is performed to confirm crescentic glomerulonephritis.

Documentation Requirements

Document the indication for biopsy, findings, and any complications.

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 allows for more specific coding of nephritic syndromes, improving the accuracy of diagnoses and treatment tracking. N05.7 provides a clear classification for cases of crescentic glomerulonephritis, which was less specific in ICD-9.

ICD-9 vs ICD-10

The transition to ICD-10 allows for more specific coding of nephritic syndromes, improving the accuracy of diagnoses and treatment tracking. N05.7 provides a clear classification for cases of crescentic glomerulonephritis, which was less specific in ICD-9.

Reimbursement & Billing Impact

The transition to ICD-10 allows for more specific coding of nephritic syndromes, improving the accuracy of diagnoses and treatment tracking. N05.7 provides a clear classification for cases of crescentic glomerulonephritis, which was less specific in ICD-9.

Resources

Clinical References

  • •
    American Academy of Nephrology

Coding & Billing References

  • •
    American Academy of Nephrology

Frequently Asked Questions

What are the key symptoms of crescentic glomerulonephritis?

Key symptoms include hematuria, proteinuria, hypertension, and edema. Patients may also experience oliguria and signs of acute kidney injury.