ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
ICD-10 CodesChapter 12: Diseases of the skin and subcutaneous tissueL52

L52

Billable

Erythema nodosum

Chapter 12:Diseases of the skin and subcutaneous tissue

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/06/2025

Code Description

ICD-10 L52 is a billable code used to indicate a diagnosis of erythema nodosum.

Key Diagnostic Point:

Erythema nodosum is a hypersensitivity reaction characterized by painful, erythematous nodules, typically located on the lower extremities. It is often associated with systemic conditions such as infections, inflammatory diseases, and certain medications. The pathophysiology involves a delayed hypersensitivity reaction, primarily affecting the subcutaneous fat tissue. Clinically, patients present with tender, raised lesions that can vary in size and may be accompanied by systemic symptoms such as fever and malaise. The diagnosis is primarily clinical, supported by a thorough history and physical examination, and may involve skin biopsy to rule out other conditions. Disease progression can vary; while some cases resolve spontaneously, others may require treatment of the underlying cause. Diagnostic considerations include identifying potential triggers such as streptococcal infections, sarcoidosis, or inflammatory bowel disease. Understanding the etiology is crucial for effective management and prevention of recurrence.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity: Requires thorough evaluation of potential underlying causes.
  • Treatment complexity: Management often involves addressing the underlying condition and symptomatic relief.
  • Documentation requirements: Comprehensive documentation of clinical findings and history is essential.
  • Coding specificity: Requires accurate coding to differentiate from other skin conditions.

Audit Risk Factors

  • Common coding errors: Misclassification with other skin disorders.
  • Documentation gaps: Incomplete history or lack of evidence for underlying causes.
  • Billing challenges: Potential denials if the underlying condition is not documented.

Specialty Focus

Medical Specialties

Dermatology

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Internal Medicine

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Related CPT Codes

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

Erythema nodosum can significantly impact patient quality of life due to pain and discomfort associated with the lesions. It is important for healthcare providers to recognize the condition as it may indicate underlying systemic diseases that require further evaluation and management. Understanding the epidemiology of erythema nodosum, including its association with infections and autoimmune conditions, can help in population health strategies and improve healthcare utilization patterns.

ICD-9 vs ICD-10

Erythema nodosum can significantly impact patient quality of life due to pain and discomfort associated with the lesions. It is important for healthcare providers to recognize the condition as it may indicate underlying systemic diseases that require further evaluation and management. Understanding the epidemiology of erythema nodosum, including its association with infections and autoimmune conditions, can help in population health strategies and improve healthcare utilization patterns.

Reimbursement & Billing Impact

Reimbursement considerations include ensuring that the diagnosis is clearly linked to the services provided. Common denials may arise from insufficient documentation of the underlying cause or lack of supporting evidence for the diagnosis. Best practices include thorough documentation of patient history, clinical findings, and any treatments administered, as well as ensuring that the coding accurately reflects the complexity of the condition.

Resources

Clinical References

  • •
    ICD-10 Official Guidelines for L00-L99
  • •
    Clinical Documentation Requirements

Coding & Billing References

  • •
    ICD-10 Official Guidelines for L00-L99
  • •
    Clinical Documentation Requirements

Frequently Asked Questions

What specific conditions are covered by L52?

L52 covers erythema nodosum, which can be triggered by infections (e.g., streptococcus), medications (e.g., sulfonamides), and systemic diseases (e.g., sarcoidosis, inflammatory bowel disease).

When should L52 be used instead of related codes?

L52 should be used when the clinical presentation aligns with erythema nodosum, particularly when there is evidence of underlying systemic disease or specific triggers, differentiating it from other erythematous conditions.

What documentation supports L52?

Documentation should include a detailed clinical history, physical examination findings, any relevant laboratory results, and notes on potential triggers or underlying conditions.