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ICD-10 Guide
ICD-10 CodesN01.5

N01.5

Billable

Rapidly progressive nephritic syndrome with diffuse mesangiocapillary glomerulonephritis

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

Code Description

ICD-10 N01.5 is a billable code used to indicate a diagnosis of rapidly progressive nephritic syndrome with diffuse mesangiocapillary glomerulonephritis.

Key Diagnostic Point:

Rapidly progressive nephritic syndrome (RPNS) is characterized by a swift decline in renal function, often leading to end-stage renal disease within weeks to months. This syndrome is associated with diffuse mesangiocapillary glomerulonephritis, which involves the proliferation of mesangial cells and thickening of the capillary walls, resulting in significant proteinuria and hematuria. Clinically, patients may present with symptoms such as edema, hypertension, and oliguria. Laboratory findings typically reveal elevated serum creatinine levels, significant proteinuria, and hematuria. A renal biopsy is crucial for diagnosis, showing mesangial proliferation and capillary wall changes. Management involves addressing the underlying cause, which may include immunosuppressive therapy, and supportive care such as blood pressure control and diuretics. Early intervention is critical to prevent irreversible kidney damage.

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.
  • Management may involve multiple specialties, complicating coding.
  • Potential for overlapping symptoms with nephrotic syndrome.

Audit Risk Factors

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

Specialty Focus

Medical Specialties

Nephrology

Documentation Requirements

Comprehensive documentation of clinical findings, lab results, and treatment plans.

Common Clinical Scenarios

Patients presenting with acute renal failure, significant proteinuria, and hematuria.

Billing Considerations

Ensure renal biopsy findings are clearly documented to support the diagnosis.

Pathology

Documentation Requirements

Detailed pathology reports describing histological findings.

Common Clinical Scenarios

Biopsy evaluations for suspected glomerulonephritis.

Billing Considerations

Pathology reports should include specific findings related to mesangiocapillary changes.

Coding Guidelines

Inclusion Criteria

Use N01.5 When
  • Follow official ICD
  • CM coding guidelines, ensuring accurate documentation of the clinical picture, including laboratory findings and treatment plans

Exclusion Criteria

Do NOT use N01.5 When
  • Exclude codes that do not reflect the specific type of nephritis

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

Biopsy report must be included in the patient's medical record.

Specialty Considerations

Nephrologists should ensure that the biopsy findings correlate 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 nephritic syndromes, improving the accuracy of diagnoses and treatment tracking. N01.5 provides a clear distinction from other nephritic and nephrotic conditions.

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. N01.5 provides a clear distinction from other nephritic and nephrotic conditions.

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. N01.5 provides a clear distinction from other nephritic and nephrotic conditions.

Resources

Clinical References

  • •
    American Academy of Nephrology

Coding & Billing References

  • •
    American Academy of Nephrology

Frequently Asked Questions

What is the primary treatment for N01.5?

The primary treatment involves addressing the underlying cause, which may include immunosuppressive therapy, along with supportive care for renal function.