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ICD-10 Guide
ICD-10 CodesL23.81

L23.81

Billable

Allergic contact dermatitis due to animal (cat) (dog) dander

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

Code Description

ICD-10 L23.81 is a billable code used to indicate a diagnosis of allergic contact dermatitis due to animal (cat) (dog) dander.

Key Diagnostic Point:

Allergic contact dermatitis due to animal dander, specifically from cats and dogs, is a hypersensitivity reaction that occurs when the skin comes into contact with allergens present in the dander of these animals. Clinically, patients may present with erythema, pruritus, and vesicular lesions at the site of exposure, which can progress to more widespread dermatitis if not managed. The anatomy involved primarily includes the epidermis and dermis, where the immune response is triggered by sensitized T-cells reacting to the allergenic proteins found in animal dander. Disease progression can vary; some individuals may experience acute symptoms that resolve with avoidance of the allergen, while others may develop chronic dermatitis characterized by lichenification and persistent itching. Diagnostic considerations include a thorough patient history, physical examination, and potentially patch testing to confirm the specific allergen responsible for the dermatitis. It is essential to differentiate this condition from other forms of dermatitis, such as atopic dermatitis or irritant contact dermatitis, to ensure appropriate management.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity: Requires differentiation from other dermatitis types.
  • Treatment complexity: May involve avoidance strategies, topical corticosteroids, and antihistamines.
  • Documentation requirements: Detailed patient history and clinical findings are necessary.
  • Coding specificity: Requires accurate identification of the allergen and symptoms.

Audit Risk Factors

  • Common coding errors: Misidentifying the allergen or using a more general dermatitis code.
  • Documentation gaps: Incomplete patient history or lack of allergy testing results.
  • Billing challenges: Potential denials if the documentation does not clearly support the diagnosis.

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

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

Allergic contact dermatitis due to animal dander is a significant clinical concern, particularly in populations with high exposure to pets. It can lead to decreased quality of life and increased healthcare utilization due to frequent visits for management of symptoms. Understanding the epidemiology of this condition helps in developing preventive strategies and improving patient education regarding allergen avoidance.

ICD-9 vs ICD-10

Allergic contact dermatitis due to animal dander is a significant clinical concern, particularly in populations with high exposure to pets. It can lead to decreased quality of life and increased healthcare utilization due to frequent visits for management of symptoms. Understanding the epidemiology of this condition helps in developing preventive strategies and improving patient education regarding allergen avoidance.

Reimbursement & Billing Impact

Reimbursement considerations may vary based on the payer, so it is essential to verify coverage policies. Common denials may arise from insufficient documentation or failure to demonstrate the medical necessity of the services provided. Coding best practices include using the most specific code available and ensuring that all relevant information is included in the medical record.

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 L23.81?

L23.81 specifically covers allergic contact dermatitis resulting from exposure to dander from cats and dogs. This includes localized skin reactions such as erythema, vesicles, and pruritus that occur after contact with these allergens.

When should L23.81 be used instead of related codes?

L23.81 should be used when the dermatitis is specifically due to cat or dog dander. If the allergen is not specified or is from another source, other codes such as L23.82 may be more appropriate.

What documentation supports L23.81?

Documentation should include a detailed patient history indicating exposure to cats or dogs, clinical findings of dermatitis, and any allergy testing results that confirm sensitivity to animal dander.