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ICD-10 Guide
ICD-10 CodesL51.0

L51.0

Billable

Nonbullous erythema multiforme

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

Code Description

ICD-10 L51.0 is a billable code used to indicate a diagnosis of nonbullous erythema multiforme.

Key Diagnostic Point:

Nonbullous erythema multiforme is an acute, self-limiting skin condition characterized by the sudden onset of target-like lesions, typically affecting the extremities and mucous membranes. The condition primarily involves the epidermis and dermis, where immune-mediated responses lead to keratinocyte apoptosis and inflammation. Clinically, patients present with symmetrical, erythematous macules and papules that may evolve into target lesions, often accompanied by pruritus or burning sensations. The disease can be triggered by infections, particularly herpes simplex virus, medications, or other environmental factors. Disease progression is generally benign, with spontaneous resolution within weeks; however, recurrent episodes may occur. Diagnostic considerations include a thorough patient history, physical examination, and, when necessary, skin biopsy to rule out other dermatological conditions such as Stevens-Johnson syndrome or toxic epidermal necrolysis. Laboratory tests may be conducted to identify underlying infections or triggers.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity
  • Treatment complexity
  • Documentation requirements
  • Coding specificity

Audit Risk Factors

  • Common coding errors include misclassification with other skin disorders.
  • Documentation gaps may arise if the specific triggers or patient history are not well-documented.
  • Billing challenges can occur if the condition is not clearly defined in the medical record.

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

Allergy and Immunology

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 ICD-10 Codes

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

Nonbullous erythema multiforme, while often self-limiting, can significantly impact patient quality of life due to discomfort and the appearance of lesions. Understanding its epidemiology is crucial, as it may be triggered by common infections or medications, making it relevant in population health discussions. Effective management and accurate coding can improve healthcare utilization patterns and ensure appropriate resource allocation for affected patients.

ICD-9 vs ICD-10

Nonbullous erythema multiforme, while often self-limiting, can significantly impact patient quality of life due to discomfort and the appearance of lesions. Understanding its epidemiology is crucial, as it may be triggered by common infections or medications, making it relevant in population health discussions. Effective management and accurate coding can improve healthcare utilization patterns and ensure appropriate resource allocation for affected patients.

Reimbursement & Billing Impact

reimbursement.

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 L51.0?

L51.0 specifically covers nonbullous erythema multiforme, which is characterized by target lesions without the presence of blisters. It is important to differentiate it from bullous forms and other similar dermatological conditions.

When should L51.0 be used instead of related codes?

L51.0 should be used when the clinical presentation aligns with nonbullous erythema multiforme, particularly when target lesions are present without blistering. It is crucial to assess the patient's history for triggers to ensure accurate coding.

What documentation supports L51.0?

Documentation should include a detailed patient history, physical examination findings, and any relevant laboratory results. Descriptions of the lesions, their distribution, and any associated symptoms are essential for supporting the diagnosis of L51.0.