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ICD-10 Guide
ICD-10 CodesN03.5

N03.5

Billable

Chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis

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

Code Description

ICD-10 N03.5 is a billable code used to indicate a diagnosis of chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis.

Key Diagnostic Point:

Chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis is characterized by persistent inflammation of the glomeruli, leading to a combination of nephritic and nephrotic features. Patients typically present with symptoms such as hematuria, proteinuria, and hypertension. The diffuse mesangiocapillary glomerulonephritis is marked by an increase in mesangial cells and matrix, resulting in a thickened glomerular capillary wall. This condition can lead to progressive renal impairment and is often associated with systemic diseases such as lupus or infections. Diagnosis is confirmed through renal biopsy, which reveals mesangial proliferation and capillary wall changes. Management involves controlling blood pressure, reducing proteinuria, and addressing any underlying conditions. Immunosuppressive therapy may be indicated in cases with significant renal impairment or persistent nephrotic syndrome.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Differentiating between nephritic and nephrotic syndrome features
  • Understanding the underlying causes of mesangiocapillary glomerulonephritis
  • Interpreting renal biopsy findings accurately
  • Managing comorbid conditions that may complicate coding

Audit Risk Factors

  • Inadequate documentation of renal biopsy findings
  • Failure to specify the chronic nature of the condition
  • Misclassification of nephritic versus nephrotic features
  • Lack of clarity on associated systemic diseases

Specialty Focus

Medical Specialties

Nephrology

Documentation Requirements

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

Common Clinical Scenarios

Patients presenting with hematuria, proteinuria, and hypertension.

Billing Considerations

Ensure renal biopsy results are clearly documented and correlate with clinical findings.

Pathology

Documentation Requirements

Comprehensive reports on renal biopsy histology and immunofluorescence findings.

Common Clinical Scenarios

Evaluation of renal tissue for glomerular diseases.

Billing Considerations

Accurate description of mesangial proliferation and capillary changes is crucial.

Coding Guidelines

Inclusion Criteria

Use N03.5 When
  • Follow official ICD
  • CM guidelines for coding chronic conditions, ensuring to document the chronic nature and any associated complications
  • Include relevant lab results and biopsy findings to support the diagnosis

Exclusion Criteria

Do NOT use N03.5 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

Renal biopsy CPT codeCPT Code

Renal biopsy

Clinical Scenario

When a renal biopsy is performed to confirm diagnosis.

Documentation Requirements

Document indication for biopsy, findings, and any complications.

Specialty Considerations

Nephrologists must ensure biopsy results are correlated with clinical symptoms.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of chronic nephritic syndromes, improving the accuracy of data collection and reimbursement processes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of chronic nephritic syndromes, improving the accuracy of data collection and reimbursement processes.

Reimbursement & Billing Impact

reimbursement processes.

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 chronic nephritic syndrome?

Key symptoms include hematuria, proteinuria, hypertension, and renal impairment.

How is diffuse mesangiocapillary glomerulonephritis diagnosed?

Diagnosis is typically made through renal biopsy, which reveals characteristic histological changes.