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ICD-10 Guide
ICD-10 CodesL66.89

L66.89

Billable

Other cicatricial alopecia

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

Code Description

ICD-10 L66.89 is a billable code used to indicate a diagnosis of other cicatricial alopecia.

Key Diagnostic Point:

L66.89 refers to other cicatricial alopecia, a condition characterized by hair loss due to scarring of the scalp. This type of alopecia can arise from various underlying causes, including inflammatory diseases such as lichen planopilaris, discoid lupus erythematosus, or folliculitis decalvans. Clinically, patients may present with patches of hair loss, often accompanied by symptoms such as itching, burning, or tenderness in the affected areas. The anatomy involved primarily includes the hair follicles and the surrounding dermal tissue, where inflammation leads to fibrosis and scarring, ultimately resulting in irreversible hair loss. Disease progression can vary; some patients may experience rapid hair loss, while others may have a more chronic course. Diagnostic considerations include a thorough clinical examination, patient history, and often a scalp biopsy to confirm the diagnosis and rule out other causes of hair loss. Laboratory tests may also be warranted to identify any underlying systemic conditions contributing to the alopecia.

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 misclassifying cicatricial alopecia types.
  • Documentation gaps may arise if the underlying cause is not clearly stated.
  • Billing challenges can occur if the treatment plan is not well-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

Pathology

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

Cicatricial alopecia, including conditions coded under L66.89, can significantly impact patients' quality of life due to visible hair loss and associated psychological effects. Understanding the epidemiology of cicatricial alopecia is essential for healthcare providers, as it can inform population health strategies and improve patient outcomes. Increased awareness and timely intervention can reduce healthcare utilization patterns related to advanced disease stages.

ICD-9 vs ICD-10

Cicatricial alopecia, including conditions coded under L66.89, can significantly impact patients' quality of life due to visible hair loss and associated psychological effects. Understanding the epidemiology of cicatricial alopecia is essential for healthcare providers, as it can inform population health strategies and improve patient outcomes. Increased awareness and timely intervention can reduce healthcare utilization patterns related to advanced disease stages.

Reimbursement & Billing Impact

Reimbursement considerations include ensuring that the diagnosis is supported by clinical findings and that any procedures performed, such as biopsies, are appropriately coded. Common denials may arise from insufficient documentation or failure to link the diagnosis with the treatment provided. Best practices include maintaining thorough records of patient interactions and treatment plans to support claims.

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 L66.89?

L66.89 encompasses various forms of cicatricial alopecia not classified elsewhere, including those resulting from autoimmune disorders, infections, and trauma. Conditions such as lichen planopilaris, discoid lupus erythematosus, and folliculitis decalvans fall under this category.

When should L66.89 be used instead of related codes?

L66.89 should be used when the cicatricial alopecia does not fit the specific criteria of other codes like L66.0 or L66.1. It is essential to document the specific etiology of the alopecia to ensure accurate coding.

What documentation supports L66.89?

Documentation should include a detailed patient history, clinical findings, and results from any diagnostic tests, such as scalp biopsies. Clear identification of the underlying cause of the cicatricial alopecia is crucial for appropriate coding.