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ICD-10 Guide
ICD-10 CodesL66.19

L66.19

Billable

Other lichen planopilaris

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

Code Description

ICD-10 L66.19 is a billable code used to indicate a diagnosis of other lichen planopilaris.

Key Diagnostic Point:

Lichen planopilaris (LPP) is a variant of lichen planus that primarily affects the hair follicles, leading to cicatricial alopecia. Clinically, it presents as a patchy or diffuse hair loss, often accompanied by pruritus and scalp tenderness. The condition is characterized by inflammation of the hair follicles, resulting in scarring and permanent hair loss if not treated promptly. The anatomy involved includes the scalp and hair follicles, where the inflammatory process disrupts normal hair growth. Disease progression can vary; some patients may experience stable disease, while others may have progressive hair loss. Diagnosis is typically made through clinical examination and may be supported by scalp biopsy, which reveals lichenoid tissue changes and follicular damage. Differential diagnoses include other forms of alopecia, such as alopecia areata and discoid lupus erythematosus, making accurate diagnosis crucial for effective management.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity: Requires clinical evaluation and possibly biopsy for confirmation.
  • Treatment complexity: Management may involve topical corticosteroids, systemic therapies, or phototherapy.
  • Documentation requirements: Detailed clinical notes and treatment plans are necessary.
  • Coding specificity: Requires precise coding to differentiate from other alopecias.

Audit Risk Factors

  • Common coding errors: Misclassification with other alopecia codes.
  • Documentation gaps: Incomplete clinical notes may lead to incorrect coding.
  • Billing challenges: Denials may occur if the diagnosis is not well-supported by documentation.

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

Primary Care

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

CPT Code

Clinical Scenario

Documentation Requirements

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

Lichen planopilaris can significantly impact patients' quality of life due to its effects on appearance and potential for permanent hair loss. Understanding its epidemiology is essential, as it may affect diverse populations differently. Effective management can improve patient outcomes and reduce healthcare utilization by preventing disease progression. Quality measures related to patient education and treatment adherence are vital for optimizing care in affected individuals.

ICD-9 vs ICD-10

Lichen planopilaris can significantly impact patients' quality of life due to its effects on appearance and potential for permanent hair loss. Understanding its epidemiology is essential, as it may affect diverse populations differently. Effective management can improve patient outcomes and reduce healthcare utilization by preventing disease progression. Quality measures related to patient education and treatment adherence are vital for optimizing care in affected individuals.

Reimbursement & Billing Impact

reimbursement. Providers should include detailed notes on the patient's history, clinical findings, and any treatments administered. Common denials may arise from insufficient documentation or misclassification of the diagnosis. To mitigate these risks, coders should ensure that the diagnosis is clearly supported by clinical evidence and that all relevant procedures are accurately coded. Familiarity with payer-specific guidelines can also enhance the billing process.

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 L66.19?

L66.19 covers other forms of lichen planopilaris that do not fall under more specific categories, including variants that may present with unique clinical features or atypical presentations.

When should L66.19 be used instead of related codes?

L66.19 should be used when the lichen planopilaris is not classified under more specific codes, such as L66.0 for alopecia areata or L66.1 for lichen planus. It is essential to ensure that the clinical presentation aligns with the criteria for L66.19.

What documentation supports L66.19?

Documentation should include a thorough clinical history, physical examination findings, and any diagnostic tests performed, such as scalp biopsies, to confirm the diagnosis of lichen planopilaris.