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ICD-10 Coding for Immunoglobulin A Glomerulonephritis(N02.B1, N02.B3)

Complete ICD-10-CM coding and documentation guide for Immunoglobulin A Glomerulonephritis. Includes clinical validation requirements, documentation requirements, and coding pitfalls.

Also known as:

IgA NephropathyBerger's Disease

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Related ICD-10 Code Ranges

Complete code families applicable to Immunoglobulin A Glomerulonephritis

N02.B1-N02.B6Primary Range

Codes for specific types of IgA nephropathy based on glomerular lesions

These codes specify the type of glomerular lesion present in IgA nephropathy, crucial for accurate diagnosis and treatment planning.

N18.x

Chronic kidney disease stages

Used to document the stage of chronic kidney disease associated with IgA nephropathy.

Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

CodeDescriptionWhen to UseKey Documentation
N02.B1IgA nephropathy with minimal change diseaseUse when biopsy confirms minimal change disease with IgA deposits.
  • Biopsy showing minimal change disease with IgA deposits
N02.B3IgA nephropathy with diffuse membranoproliferative glomerulonephritisUse when biopsy confirms diffuse membranoproliferative GN with IgA deposits.
  • Biopsy showing diffuse membranoproliferative GN with IgA deposits

Clinical Decision Support

Always review the patient's clinical documentation thoroughly. When in doubt, choose the more specific code and ensure documentation supports it.

Key Information: ICD-10 code for IgA nephropathy

Essential facts and insights about Immunoglobulin A Glomerulonephritis

The ICD-10 code for IgA nephropathy is determined by the specific glomerular lesion, such as N02.B1 for minimal change disease.

Primary ICD-10-CM Codes for immunoglobulin a glomerulonephritis

N02.B1
IgA nephropathy with minimal change disease
Billable Code

Decision Criteria

clinical Criteria

  • Biopsy confirms minimal change disease with IgA deposits.

Applicable To

  • Minimal change disease with IgA deposits

Excludes

Clinical Validation Requirements

  • Biopsy showing minimal change disease with IgA deposits

Code-Specific Risks

  • Misclassification if biopsy details are not specific.

Coding Notes

  • Ensure biopsy report specifies IgA deposits.
View Full Code Details

Ancillary Codes

Additional codes that should be used in conjunction with the main diagnosis codes when applicable.

Chronic kidney disease stage

N18.x
Use to specify the stage of CKD associated with IgA nephropathy.

Differential Codes

Alternative codes to consider when ruling out similar conditions to the primary diagnosis.

IgA vasculitis

D69.0
Presence of systemic symptoms like purpura and abdominal pain.

Chronic glomerulonephritis

N03.2
Absence of IgA deposits on biopsy.

Documentation & Coding Risks

Avoid these common documentation and coding issues when documenting Immunoglobulin A Glomerulonephritis to ensure proper reimbursement, maintain compliance, and reduce audit risk. These guidelines are particularly important when using ICD-10 code N02.B1.

Impact

Clinical: Potential misdiagnosis and inappropriate treatment., Regulatory: Failure to meet documentation standards., Financial: Denied claims due to lack of specificity.

Mitigation Strategy

Ensure biopsy details are included in documentation., Use specific terminology for glomerular lesions.

Impact

Reimbursement: Incorrect DRG assignment leading to potential underpayment., Compliance: Non-compliance with ICD-10 specificity requirements., Data Quality: Inaccurate clinical data affecting patient management.

Mitigation Strategy

Query provider for specific glomerular lesion type per biopsy.

Impact

Risk of using non-specific codes for IgA nephropathy.

Mitigation Strategy

Ensure biopsy reports are detailed and specific codes are used.

Documentation errors, coding pitfalls, and audit risks are interconnected aspects of medical coding and billing. Addressing all three areas helps ensure accurate coding, optimal reimbursement, and regulatory compliance.

Frequently Asked Questions

Common questions about ICD-10 coding for Immunoglobulin A Glomerulonephritis, with expert answers to help guide accurate code selection and documentation.

Documentation Templates for Immunoglobulin A Glomerulonephritis

Use these documentation templates to ensure complete and accurate documentation for Immunoglobulin A Glomerulonephritis. These templates include all required elements for proper coding and billing.

Biopsy-confirmed IgA nephropathy

Specialty: Nephrology

Required Elements

  • Biopsy results
  • Oxford classification
  • eGFR levels
  • Proteinuria quantification

Example Documentation

Patient with biopsy-proven IgA nephropathy (Oxford M1E0S1T2C0). Current eGFR 58 mL/min, proteinuria 1.2 g/day.

Examples: Poor vs. Good Documentation

Poor Documentation Example
Chronic glomerulonephritis
Good Documentation Example
IgA nephropathy with diffuse mesangial hypercellularity (M1) and 30% tubular atrophy (T2)
Explanation
The good example provides specific biopsy findings necessary for accurate coding.

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